TIGER

Journal Articles: 167 results
Magnetized Water: Science or Fraud?  L. Lahuerta Zamora, G. M. Antón-Fos, P. A. Alemán López, and R. V. Martin Algarra
Commercial water magnetizers provide a unique opportunity to help university and secondary students develop appropriate skepticism against extraordinary claims and use testing as the basis for their scientific evaluation.
Lahuerta Zamora, L.; Antón-Fos, G. M.; Alemán López, P. A.; Martin Algarra, R. V. J. Chem. Educ. 2008, 85, 1416.
Aqueous Solution Chemistry |
Magnetic Properties |
pH |
Titration / Volumetric Analysis |
Water / Water Chemistry
Phenolphthalein—Pink Tornado Demonstration  Bruce R. Prall
This demonstration uses the vortex generated by a spinning magnetic stir bar to demonstrate Le Châtelier's principle as it applies to the phenolphthalein equilibrium in water and provides an excellent opportunity to discuss limiting and excess reagents.
Prall, Bruce R. J. Chem. Educ. 2008, 85, 527.
Acids / Bases |
Equilibrium |
Kinetics |
pH
Chemical Speciation and Calculation of pH of a Sport Drink  José L. Guiñón Segura
A recently published laboratory procedure allows students to see that the pointer function has a minimum value at the solution pH. However, the resolution of the pointer function requires the plotting the logarithmic concentration diagram, which is time-consuming and tedious.
Segura, José L Guiñón. J. Chem. Educ. 2008, 85, 371.
Acids / Bases |
Aqueous Solution Chemistry |
Consumer Chemistry |
Food Science |
Mathematics / Symbolic Mathematics |
pH |
Quantitative Analysis
Scientific–Chemical Viewpoints Regarding Smoking: A Science Laboratory for All  Ron Blonder
This article describes a lab that examines the acidity of cigarette smoke as well as solid particles and vapor phase substances found therein, and simulates the effects of smoking on the lungs. The aim of this activity is to expose adolescents to the scientific aspects of smoking and the relevance of chemistry in everyday life.
Blonder, Ron. J. Chem. Educ. 2008, 85, 248.
Acids / Bases |
Consumer Chemistry |
Gases |
Laboratory Equipment / Apparatus |
pH |
Applications of Chemistry |
Student-Centered Learning
The Chemistry of Paper Preservation  Henry A. Carter
This article examines the applications of chemistry to paper preservation. The acid-catalyzed hydrolysis of cellulose accounts for the deterioration of paper in library books and other written records. To combat this threat to our written heritage, new permanent papers have been developed that are relatively chemically stable and undergo a very slow rate of deterioration.
Carter, Henry A. J. Chem. Educ. 2007, 84, 1937.
Acids / Bases |
Applications of Chemistry |
Aqueous Solution Chemistry |
Free Radicals |
Gas Chromatography |
HPLC |
pH |
Kinetics |
Rate Law
Imidazole as a pH Probe: An NMR Experiment for the General Chemistry Laboratory  William J. Hagan, Jr., Dennis L. Edie, and Linda B. Cooley
An experiment is described that employs the 1H-NMR signal of aqueous imidazole to determine the pH of an unknown solution. The procedure involves the preparation of a calibration curve, which is then used for the analysis of the unknown(s).
Hagan, William J., Jr.; Edie, Dennis L.; Cooley, Linda B. J. Chem. Educ. 2007, 84, 1188.
Acids / Bases |
Aqueous Solution Chemistry |
Aromatic Compounds |
Calibration |
NMR Spectroscopy |
pH
Defining and Teaching pH  Richard F. Burton
At an elementary level, pH and the algebra of equilibria can be simply and correctly taught, without logarithms, in terms of the modern, operationally-defined pH scale that underlies laboratory measurement and relates to activities.
Burton, Richard F. J. Chem. Educ. 2007, 84, 1129.
Acids / Bases |
pH |
Aqueous Solution Chemistry
The Chemistry of Swimming Pool Maintenance  Carl Salter and David L. Langhus
This paper examines the key ideas behind swimming pool chemistry -- the central importance of pH and its effect on chlorine sanitation and calcium carbonate solubility. The paper also reviews the analytical procedures and common practices used to monitor and control pool chemistry or correct problems.
Salter, Carl; Langhus, David L. J. Chem. Educ. 2007, 84, 1124.
Acids / Bases |
Applications of Chemistry |
Aqueous Solution Chemistry |
Dyes / Pigments |
pH |
Photochemistry |
Precipitation / Solubility |
Water / Water Chemistry
pHantastic Fluorescence  Mark Muyskens
Students easily extract a fluorescent substance from shavings of a wood called narra. The fluorescence is dramatically pH dependent and can be turned on and off repeatedly using commonly available acid and base solutions.
Muyskens, Mark. J. Chem. Educ. 2006, 83, 768A.
Fluorescence Spectroscopy |
Natural Products |
Nucleophilic Substitution |
pH |
Solutions / Solvents |
UV-Vis Spectroscopy
Negative pH Does Exist  Kieran F. Lim ()
The misconception that pH lies between 0 and 14 has been perpetuated in popular-science books, textbooks, revision guides, and reference books.
Lim, Kieran F. (). J. Chem. Educ. 2006, 83, 1465.
Acids / Bases |
Aqueous Solution Chemistry |
pH
The Fluorescence of Lignum nephriticum: A Flash Back to the Past and a Simple Demonstration of Natural Substance Fluorescence  Mark Muyskens
This article describes a simple but visually striking demonstration of fluorescence from the aqueous extract of the tropical hardwood Pterocarpus indicus.
Muyskens, Mark. J. Chem. Educ. 2006, 83, 765.
Acids / Bases |
Fluorescence Spectroscopy |
Natural Products |
pH |
Solutions / Solvents |
UV-Vis Spectroscopy
pH Paradoxes: Demonstrating That It Is Not True That pH ≡ -log[H+]  Christopher G. McCarty and Ed Vitz
Six demonstrations highlighting paradoxes that arise if pH is incorrectly defined as -log[H+] are presented as justification for the recommendation that pH should be correctly defined as pH = -log aH+ in textbooks.
McCarty, Christopher G.; Vitz, Ed. J. Chem. Educ. 2006, 83, 752.
Acids / Bases |
Aqueous Solution Chemistry |
Ion Selective Electrodes |
pH |
Quantitative Analysis
Linking Laboratory Experiences to the Real World: The Extraction of Octylphenoxyacetic Acid from Water  Jorge E. Loyo-Rosales, Alba Torrents, Georgina C. Rosales-Rivera, and Clifford P. Rice
A known quantity of the sodium salt of octylphenoxyacetic acid is dissolved in water, transformed to the acid (insoluble) form, and extracted using dichloromethane. These changes can be followed visually owing to conspicuous changes in solution turbidity.
Loyo-Rosales, Jorge E.; Torrents, Alba; Rosales-Rivera, Georgina C.; Rice, Clifford P. J. Chem. Educ. 2006, 83, 248.
Acids / Bases |
Applications of Chemistry |
Aqueous Solution Chemistry |
pH |
Stoichiometry |
Nonmajor Courses |
Water / Water Chemistry
Determination of Hypochlorite in Bleaching Products with Flower Extracts To Demonstrate the Principles of Flow Injection Analysis  Luiz Antônio Ramos, Kátia Roberta Prieto, Éder Tadeu Gomes Cavalheiro, and Carla Cristina Schmitt Cavalheiro
Proposes the use of crude flower extracts and a bleaching reaction between hypochlorite and anthocyanins to teach the principles of flow injection procedures.
Ramos, Luiz Antônio; Prieto, Kátia Roberta; Cavalheiro, Éder Tadeu Gomes; Cavalheiro, Carla Cristina Schmitt. J. Chem. Educ. 2005, 82, 1815.
Dyes / Pigments |
Natural Products |
pH |
Quantitative Analysis |
UV-Vis Spectroscopy |
Aromatic Compounds
Using Visible Spectrophotometers and pH Measurements To Study Speciation in a Guided-Inquiry Laboratory   William H. Otto, Cynthia K. Larive, Susan L. Mason, Janet B. Robinson, Joseph A. Heppert, and James D. Ellis
A collective-effort, guided-inquiry laboratory investigation was developed for the second-semester general chemistry laboratory for the purpose of increasing student conceptual understanding of equilibrium and speciation phenomena. This investigation required students to employ the chemical indicator phenol red in phosphate buffer solution, computer interfaced pH probes, and visible spectrophotometers. Through a combination of potentiometric and visible absorption measurements, the students determined the pH conditions that alter equilibrium concentrations of multiple species (colored and transparent) in solution.
Otto, William H.; Larive, Cynthia K.; Mason, Susan L.; Robinson, Janet B.; Heppert, Joseph A.; Ellis, James D. J. Chem. Educ. 2005, 82, 1552.
Acids / Bases |
UV-Vis Spectroscopy |
Equilibrium |
pH |
Water / Water Chemistry |
Dyes / Pigments
Teaching pH Measurements with a Student-Assembled Combination Quinhydrone Electrode  Fritz Scholz, Tim Steinhardt, Heike Kahlert, Jens R. Pörksen, and Jürgen Behnert
A combination pH electrode that can be assembled by the student is described. It consists of a glass holder and two sensors in the form of rubber stoppers that contain quinhydrone and graphite. The combination electrode is suitable to teach potentiometric measurements, pH measurements, and the interplay of acidbase and redox equilibria. The electrode meets highest safety standards and overcomes the troubles associated with the use of the conventional quinhydrone electrode.
Scholz, Fritz; Steinhardt, Tim; Kahlert, Heike; Pörksen, Jens R.; Behnert, Jürgen. J. Chem. Educ. 2005, 82, 782.
Acids / Bases |
pH |
Laboratory Equipment / Apparatus |
Electrochemistry
Color Changes in Indicator Solutions  Addison Ault
Addresses the question "Can an indicator solution change color upon dilution?"
Ault, Addison. J. Chem. Educ. 2002, 79, 1070.
Acids / Bases |
pH
Microscale pH Titrations Using an Automatic Pipet  Edward B. Flint, Carrie L. Kortz, and Max A. Taylor
A technique for microscale pH titrations using 1-5 mL of analyte and titrant.
Flint, Edward B.; Kortz, Carrie L.; Taylor, Max A. J. Chem. Educ. 2002, 79, 705.
Acids / Bases |
Instrumental Methods |
Microscale Lab |
pH |
Titration / Volumetric Analysis
pH of Sodium Acetate Solutions  Guy Schmitz
Example of buffering power in deviations of the pH of sodium acetate from calculated values.
Schmitz, Guy. J. Chem. Educ. 2002, 79, 29.
Acids / Bases |
Carboxylic Acids |
pH
Response to Potential-Energy-Only Models (re J. Chem. Educ. 2000, 77, 155-156)  Frank Rioux and Roger L. DeKock
Example of buffering power in deviations of the pH of sodium acetate from calculated values.
Rioux, Frank; DeKock, Roger L. J. Chem. Educ. 2002, 79, 29.
Acids / Bases |
Carboxylic Acids |
pH |
Atomic Properties / Structure |
Quantum Chemistry |
Theoretical Chemistry
A Comparative Study of Microscale and Standard Burets  Mono M. Singh, Cynthia B. McGowan, Zvi Szafran, and R. M. Pike
This paper describes a comparative study of the performance of microscale titrations using 2-mL microscale burets with those using Beral pipets and normal 50- and 10-mL burets. The usefulness of a microburet in general and analytical chemistry is demonstrated by presenting results from acid-base, oxidation-reduction, precipitation, complexometric, and pH titrations.
Singh, Mono M.; McGowan, Cynthia B.; Szafran, Zvi; Pike, Ronald M. J. Chem. Educ. 2000, 77, 625.
Acids / Bases |
Aqueous Solution Chemistry |
Laboratory Equipment / Apparatus |
Microscale Lab |
Quantitative Analysis |
Oxidation / Reduction |
Titration / Volumetric Analysis |
pH |
Precipitation / Solubility
Environmental Chemistry Using Ultrasound  Belinda K. Wilmer, Edward Poziomek, and Grazyna E. Orzechowska
In this demonstration, we describe a simple method for presenting the usefulness of sonication in environmental chemistry. When an aqueous solution of carbon tetrachloride is sonicated, it degrades to produce HCl and HOCl. These products cause a reduction of pH, which can be observed visually with a pH indicator.
Wilmer, Belinda K.; Poziomek, Edward; Orzechowska, Grazyna E. J. Chem. Educ. 1999, 76, 1657.
Acids / Bases |
Aqueous Solution Chemistry |
pH
Using Chemistry and Color To Analyze Household Products: A 10-12 Hour Laboratory Project at the General Chemistry Level  Wayne B. Bosma
A sequence of experiments using a UV-Vis spectrometer to identify food colorings and to measure the pH of soft drinks allowing qualitative and quantitative measurements to be made.
Bosma, Wayne B. J. Chem. Educ. 1998, 75, 214.
Consumer Chemistry |
Spectroscopy |
UV-Vis Spectroscopy |
Dyes / Pigments |
pH |
Qualitative Analysis |
Quantitative Analysis
From Christmas Ornament to Glass Electrode  Rogério T. da Rocha, Ivano G. R. Gutz, and Claudimir L. do Lago
Instructions and use of a homemade glass electrode for pH measurements/titrations.
Da Rocha, Rogerio T.; Gutz, Ivano G. R.; do Lago, Claudimir L. J. Chem. Educ. 1995, 72, 1135.
Laboratory Equipment / Apparatus |
Electrochemistry |
Titration / Volumetric Analysis |
Ion Selective Electrodes |
Aqueous Solution Chemistry |
Acids / Bases |
Laboratory Management |
pH
Preparing "Chameleon Balls" from Natural Plants: Simple Handmade pH Indicator and Teaching Material for Chemical Equilibrium  Naoki Kanda, Takayuki Asano, Toshiyuki Itoh, and Makoto Onoda
Description of preparation and use of polysaccharide beads containing anthocyanins to teach students about chemical equilibrium under different pH conditions.
Kanda, Naoki; Asano, Takayuki; Itoh, Toshiyuki; Onoda, Makota. J. Chem. Educ. 1995, 72, 1131.
Acids / Bases |
Plant Chemistry |
Equilibrium |
Dyes / Pigments |
pH
From Titration Data to Buffer Capacities: A Computer Experiment for the Chemistry Lab or Lecture  Roy W. Clark, Gary D. White, Judith M. Bonicamp, and Exum D. Watts
Provides titration curve data that students can plot and analyze using spreadsheets to develop student understanding of pH, derivatives, buffer capacity, and the behavior of dilute buffers; includes sample graphs and analysis.
Clark, Roy W.; White, Gary D.; Bonicamp, Judith M.; Watts, Exum D. J. Chem. Educ. 1995, 72, 746.
Acids / Bases |
pH |
Titration / Volumetric Analysis |
Chemometrics
A Digital pH-mV Meter for Overhead Projection  DuPre, Donald B.; Just, Warren E.
A commercially available and relatively inexpensive pH-mV meter may be readily modified for display on an overhead projector.
DuPre, Donald B.; Just, Warren E. J. Chem. Educ. 1994, 71, 1081.
pH |
Laboratory Equipment / Apparatus
Teaching the Truth about pH  Hawkes, Stephen J.
-log[H+] is only an approximation to pH; how to teach pH to avoid misleading students.
Hawkes, Stephen J. J. Chem. Educ. 1994, 71, 747.
pH |
Acids / Bases |
Aqueous Solution Chemistry |
Equilibrium
Fruit Anthocyanins: Colorful Sensors of Molecular Milieu  Curtright, Robert D.; Rynearson, James A .; Markwell, John
Provides background and references as a starting point for the further exploration of anthocyanins.
Curtright, Robert D.; Rynearson, James A .; Markwell, John J. Chem. Educ. 1994, 71, 682.
Dyes / Pigments |
Acids / Bases |
Equilibrium |
pH
Student's Models of Matter in the Context of Acid-Base Chemistry  Nakhleh, Mary B.
Secondary students' understandings of acids, bases, and pH which emerged in semi-structured interviews conducted as part of a larger study of the effects of three levels of instrumentation on students' understandings of acids, bases, and pH.
Nakhleh, Mary B. J. Chem. Educ. 1994, 71, 495.
Acids / Bases |
pH
Pictorial Analogies XI: Concentrations and Acidity of Solutions  Fortman, John J.
Visual analogies of the concentration of a solution, strength of a solution, super saturated solution, conjugate acid-base pairs, and inverse relationship between pH and [H+] and pOH and [OH-].
Fortman, John J. J. Chem. Educ. 1994, 71, 430.
Solutions / Solvents |
Aqueous Solution Chemistry |
Acids / Bases |
pH
LIMSport (V): pH Data Acquisition: An Inexpensive Probe and Calibration Software  Vitz, Ed; Betts, Thomas A.
161. Construction and use of a "software pH meter".
Vitz, Ed; Betts, Thomas A. J. Chem. Educ. 1994, 71, 412.
pH |
Instrumental Methods |
Laboratory Computing / Interfacing
A recipe for the preparation of a pH 7.00 calibration buffer  Jackman, Donald C.
Simple recipe for preparation of a pH 7.00 calibration buffer based on the NIST standard.
Jackman, Donald C. J. Chem. Educ. 1993, 70, 853.
Acids / Bases |
Laboratory Management |
pH
The determination of "apparent" pKa's: An experiment for liberal arts or science students  Cawley, John J.
An experiment with two different "conclusions" to be reached: one for liberal arts students, one for science students.
Cawley, John J. J. Chem. Educ. 1993, 70, 596.
Acids / Bases |
Nonmajor Courses |
pH
A study of the pH of perspiration from male and female subjects exercising in the gymnasium: A practical challenge for students in the nonscience major class  Doran, Daniel; Tierney, John; Varano, Mary; Ware, Susan
An engaging activity is developed out of an authentic inquiry posed by students. This article presents the debate behind the title question, a procedure, sample data, results, and discussion.
Doran, Daniel; Tierney, John; Varano, Mary; Ware, Susan J. Chem. Educ. 1993, 70, 412.
Acids / Bases |
Applications of Chemistry |
Nonmajor Courses |
pH
An inexpensive parallel interface to a digital pH meter   McMahon, John J.; Braca, Paul R.
The authors have designed an experiment in which the students build their own parallel interface "card" from inexpensive components.
McMahon, John J.; Braca, Paul R. J. Chem. Educ. 1992, 69, A156.
Laboratory Equipment / Apparatus |
pH
A 39-drop pH scale   Silberman, Robert G.
The author discusses a system which can be used to prepare a solution of any pH 2-12.
Silberman, Robert G. J. Chem. Educ. 1992, 69, A42.
pH |
Microscale Lab |
Laboratory Management
The acid-base package  Ramette, Richard W.; Holmes, Jon L.
Software that will calculate theoretical titration curve data and the pH for any mixture of acids and/or bases.
Ramette, Richard W.; Holmes, Jon L. J. Chem. Educ. 1992, 69, 1010.
Acids / Bases |
pH |
Titration / Volumetric Analysis
Red, white, blue, and yellow chemistry  Dewar, Phyllis D.
Producing a colored U.S. flag using Congo red.
Dewar, Phyllis D. J. Chem. Educ. 1992, 69, 572.
Acids / Bases |
pH
A low-cost pH meter for the classroom.  Harris, David L.; Harris, Daniel C.
Design of an inexpensive yet precise pH meter for classroom use.
Harris, David L.; Harris, Daniel C. J. Chem. Educ. 1992, 69, 563.
Laboratory Equipment / Apparatus |
pH |
Acids / Bases
The pH range of the Mohr titration for chloride ion can be usefully extended to 4-10.5  Finlayson, A. C.
The pH ranges found in textbooks for this titration are misleading because of inadequate explanations for their basis.
Finlayson, A. C. J. Chem. Educ. 1992, 69, 559.
pH |
Titration / Volumetric Analysis |
Quantitative Analysis
An AC-adapter for battery operated pH meters  Mercer, Gary D.
Directions for creating an AC adapter for pH meters that are battery operated.
Mercer, Gary D. J. Chem. Educ. 1992, 69, 402.
pH |
Laboratory Equipment / Apparatus |
Laboratory Management
An MS-DOS microcomputer controlled titration system  Stangeland, Leiv Jonn; Anjo, Dennis M.
136. In this experiment the computer is employed to control the addition rate of titrant based on the change in pH of the analyte system.
Stangeland, Leiv Jonn; Anjo, Dennis M. J. Chem. Educ. 1992, 69, 296.
Titration / Volumetric Analysis |
pH |
Laboratory Computing / Interfacing
Algorithm for plotting titration curves (author response).  Rodrigues de Moura, Daniel.
Our model, contrary to Jackman's statement, can be applied to redox systems that are pH-dependant.
Rodrigues de Moura, Daniel. J. Chem. Educ. 1992, 69, 257.
pH |
Oxidation / Reduction |
Titration / Volumetric Analysis
Algorithm for plotting titration curves.  Jackman, Donald C.
de Moura's algorithm for plotting redox titration curves seems to be good for systems that are not dependent on pH or product concentration, but is not applicable to those situations that is student is more likely to encounter.
Jackman, Donald C. J. Chem. Educ. 1992, 69, 257.
Oxidation / Reduction |
Titration / Volumetric Analysis |
pH
Demonstrations with red cabbage indicator   Fortman, John J.; Stubbs, Katherine M.
This paper extends the use of the red cabbage extract into demonstrations that illustrate the acidic or basic nature of solutions of gases and gives suggestions for modifications to project the beautiful range of colors and shades for better viewing in large lecture halls.
Fortman, John J.; Stubbs, Katherine M. J. Chem. Educ. 1992, 69, 66.
Acids / Bases |
pH |
Gases
Chemical equilibrium: VIII. Precipitates   Gordus, Adon A.
The final article in a series (see previous months this year): This article focuses on ionic precipitates in water and how buffered solutions allow easier calculation of solubilities.
Gordus, Adon A. J. Chem. Educ. 1991, 68, 927.
Acids / Bases |
Equilibrium |
pH |
Precipitation / Solubility |
Aqueous Solution Chemistry |
Water / Water Chemistry
Advanced titration plots using spreadsheet scripting  Currie, James O., Jr.; Whiteley, Richard V., Jr.
131. A spreadsheet aids in student understanding of acid/base titration calculations.
Currie, James O., Jr.; Whiteley, Richard V., Jr. J. Chem. Educ. 1991, 68, 923.
Acids / Bases |
Titration / Volumetric Analysis |
pH |
Laboratory Computing / Interfacing |
Equilibrium
Demonstration properties of sulfur dioxide   Brouwer, H.
Demonstrations of properties of sulfur dioxide are timely, given current debates between Canada and the United States regarding acid rain.
Brouwer, H. J. Chem. Educ. 1991, 68, 417.
Acids / Bases |
Green Chemistry |
pH
Using the Apple game port to measure pH  Kelly, Edward
A circuit that measures electrical potential using the pushbutton and annunciator connections at the Apple game port.
Kelly, Edward J. Chem. Educ. 1990, 67, A254.
Laboratory Computing / Interfacing |
pH
A pH-monitoring and control system for teaching laboratories  Ibez, Jorge G.; Tavera, Luis; Rodriguez, Alberto; Gomez del Campo, Enrique
The authors describe a simple microcomputer apparatus that can be used to monitor the pH change that occurs during the course of a chemical reaction, to maintain a constant pH in a chemical reactor, and to perform an automated titration.
Ibez, Jorge G.; Tavera, Luis; Rodriguez, Alberto; Gomez del Campo, Enrique J. Chem. Educ. 1990, 67, A74.
pH |
Titration / Volumetric Analysis |
Laboratory Computing / Interfacing
A short program for the automatic calculation of pH in solutions having many acids or bases  Campanario, Juan Miguel; Ballesteros, Reyes
121. Bits and pieces, 45. A computer program for calculating the pH of mixtures having many acids or bases.
Campanario, Juan Miguel; Ballesteros, Reyes J. Chem. Educ. 1990, 67, 1036.
Acids / Bases |
pH
A modified graphical method for acid-base equilibria  Nakagawa, Kuniaki
A method based on logarithmic diagrams for finding the pH values for various systems in acid-base equilibria.
Nakagawa, Kuniaki J. Chem. Educ. 1990, 67, 673.
Acids / Bases |
Equilibrium |
pH
Development of a new design for multipurpose meter: "Calo-pH Meter"   Paris, Michel R.; Aymes, Daniel J.; Poupon, Rene; Gavasso, Roland
The purpose of this article is to describe the design of a common box that can be turned into a simple voltmeter, a pH meter, or a calorimeter.
Paris, Michel R.; Aymes, Daniel J.; Poupon, Rene; Gavasso, Roland J. Chem. Educ. 1990, 67, 507.
Laboratory Equipment / Apparatus |
Electrochemistry |
pH |
Calorimetry / Thermochemistry
The pH of any mixture of monoprotic acids and bases  Herman, D. P.; Booth, K. K.; Parker, O. J.; Breneman, G. L.
115. Bits and pieces, 44. The pH of any mixture of monoprotic weak and strong acids and bases can be calculated. A curve can also be plotted for the titration of the mixture by any monoportic weak or strong acid or base.
Herman, D. P.; Booth, K. K.; Parker, O. J.; Breneman, G. L. J. Chem. Educ. 1990, 67, 501.
Acids / Bases |
Titration / Volumetric Analysis |
pH
Acid content of beverages: A general chemistry experiment involving the resolution of apparent anomalies  Fuchsman, William H.; Garg, Sandhya
The authors connect the chemistry of strong and weak acids not only to the world outside the laboratory but also to the kinds of problem solving that engages real scientists.
Fuchsman, William H.; Garg, Sandhya J. Chem. Educ. 1990, 67, 67.
Acids / Bases |
Food Science |
pH
Colorimetric determination of pH  Tucker, Sheryl; Robinson, Rebecca; Keane, Charlene; Boff, Margaret; Zenko, Michelle; Batish, Sanjay; Street, Kenneth W., Jr.
Advantages and application of colorimeter to pH measurements.
Tucker, Sheryl; Robinson, Rebecca; Keane, Charlene; Boff, Margaret; Zenko, Michelle; Batish, Sanjay; Street, Kenneth W., Jr. J. Chem. Educ. 1989, 66, 769.
pH |
Spectroscopy |
Dyes / Pigments
Digitizing circuit for measuring voltage with the Apple II game port  Tang, Tong B.; Lee, Albert W. M.; Chan, Sebastian H. T.
102. Bits and pieces, 40. The authors have designed and tested a 10-bit analog-to-digital circuit that makes use of the Apple II+ game port and is very cheap.
Tang, Tong B.; Lee, Albert W. M.; Chan, Sebastian H. T. J. Chem. Educ. 1989, 66, 410.
pH |
Laboratory Computing / Interfacing
The formaldehyde-sulfite clock reaction revisited  Warneck, Peter
The purpose of this present note is to discuss the mechanism and the change of pH during the reaction.
Warneck, Peter J. Chem. Educ. 1989, 66, 334.
Mechanisms of Reactions |
pH |
Rate Law
Tools of the trade   Bruno, Michael J.
High school teachers can never have too many visual aids when teaching chemistry. This author shares some demonstrations in equilibrium that often produce "oohs" and "aaaahs" from his students.
Bruno, Michael J. J. Chem. Educ. 1988, 65, 698.
Equilibrium |
pH
pH measurements on the overhead projector  Solomon, Sally; High, Nancy
Universal indicator solution and a corresponding pH indicator chart are used to make pH measurements of an overhead projector where the results are visible to all students in a large lecture hall.
Solomon, Sally; High, Nancy J. Chem. Educ. 1987, 64, 964.
pH |
Acids / Bases |
Dyes / Pigments
Buffer capacity: An undergraduate laboratory experiment  Russo, Steven O.; Hanania, George I. H.
A quantitative experiment that can demonstrate buffer action and the measurement of buffer capacity, for a given buffer system, over a range of pH.
Russo, Steven O.; Hanania, George I. H. J. Chem. Educ. 1987, 64, 817.
Acids / Bases |
pH |
Aqueous Solution Chemistry
The effect of pH and chloride ion concentration on the mobilities of various cations in soil  Brown, Melody; Sutherland, Mary; Leharne, Stephen
Measuring the mobilities of cations (particularly of toxic metals) in soils using soil thin layer chromatography.
Brown, Melody; Sutherland, Mary; Leharne, Stephen J. Chem. Educ. 1987, 64, 448.
pH |
Agricultural Chemistry |
Metals |
Thin Layer Chromatography
Demonstration of the pH changes during the electrolysis of water  Habich, A.; Hausermann, H. R.
Demonstration of the pH changes around the anode and cathode during the electrolysis of water.
Habich, A.; Hausermann, H. R. J. Chem. Educ. 1987, 64, 171.
Electrochemistry |
pH
The electrolysis of water: An improved demonstration procedure   Heideman, Stephen
The usual use of sulfuric acid as the electrolyte in the demonstration of the electrolysis of water does not allow students to observe the accompanying pH changes at the electrodes.
Heideman, Stephen J. Chem. Educ. 1986, 63, 809.
Water / Water Chemistry |
pH |
Electrochemistry
Density gradient columns for chemical displays  Guenther, William B.
An important advantage of these demonstrations of complex chemistry is that students can observe them over a period of time as they grasp concepts of solution equilibria.
Guenther, William B. J. Chem. Educ. 1986, 63, 148.
Acids / Bases |
pH |
Coordination Compounds |
Metals
Buffer demonstration  Ophardt, Charles E.
Emphasizes the difference in properties between strong and weak acids and that only a weak acid or base and its salt are a buffer.
Ophardt, Charles E. J. Chem. Educ. 1985, 62, 608.
Acids / Bases |
pH |
Dyes / Pigments
To buffer or not to buffer, that is the question  Mancott, A.
Question involves the preparation of a buffer solution by a chemical reaction but does not have the resultant solution act as a buffer.
Mancott, A. J. Chem. Educ. 1985, 62, 606.
Acids / Bases |
pH
An invitation to experiment with an experiment  Phanstiel, Otto
Students are asked to develop an experiment in which they isolate an acid / base indicator from a flower and determine the pH at which it changes color.
Phanstiel, Otto J. Chem. Educ. 1985, 62, 522.
Acids / Bases |
Dyes / Pigments |
pH
Visualization of buffer action and the acidifying effect of CO2  Schonbeck, Niels D.
Includes a discussion of the physiological buffering of CO2 in the human body.
Schonbeck, Niels D. J. Chem. Educ. 1985, 62, 436.
Acids / Bases |
pH
A simple demonstration of buffer action  Duerst, Marilyn D.
A simple yet impressive visual demonstration of buffer action.
Duerst, Marilyn D. J. Chem. Educ. 1985, 62, 435.
Acids / Bases |
pH
An alternative method for the determination of pKa  Castillo S., Carlos; Micolta S., Germania; Grajales T., Mario
Determining pKa from the titration curve of a weak acid or base.
Castillo S., Carlos; Micolta S., Germania; Grajales T., Mario J. Chem. Educ. 1984, 61, 1067.
Acids / Bases |
pH |
Aqueous Solution Chemistry |
Solutions / Solvents
An inexpensive, very high impedance digital voltmeter for selective electrodes  Caceci, Marco S.
Design and construction of an instrument that exceeds in accuracy and input impedance most expensive commercial pH meters and potentiometers.
Caceci, Marco S. J. Chem. Educ. 1984, 61, 935.
Laboratory Equipment / Apparatus |
Electrochemistry |
pH
Why teach solution equilibrium?  Butler, James N.
What are the most important aspects of solution equilibrium to teach at the elementary level?
Butler, James N. J. Chem. Educ. 1984, 61, 784.
Equilibrium |
Solutions / Solvents |
Acids / Bases |
pH
The rainbow connection  Hutton, Bill
Demonstrates how the color of certain acid-base indicators can be influenced in a reversible manner by changes in pH.
Hutton, Bill J. Chem. Educ. 1984, 61, 172.
Acids / Bases |
pH |
Dyes / Pigments
Sequential color reactions: School colors and a red-white-and-blue demonstration   Lambert, Jack L.; Chejlava, Michael J.; Fina, Gary T.; Luce, Nina L.
Many school colors can be generated using the directions for acid-base demonstrations in this article.
Lambert, Jack L.; Chejlava, Michael J.; Fina, Gary T.; Luce, Nina L. J. Chem. Educ. 1983, 60, 141.
pH |
Acids / Bases |
Dyes / Pigments
A pocket calculator program for the solution of pH problems via the method of successive approximations   Guida, Wayne C.
37. Bits and pieces, 14. A description of a pocket calculator program for the solution of pH problems via the method of successive approximations .
Guida, Wayne C. J. Chem. Educ. 1983, 60, 101.
pH |
Acids / Bases |
Chemometrics
A tutorial program for pH calculation   Palmer, Glenn E.
37. Bits and pieces, 14. These authors describe a calculator program that can be used to help students drill pH calculations.
Palmer, Glenn E. J. Chem. Educ. 1983, 60, 101.
pH |
Titration / Volumetric Analysis
pH meter revisions  Eisnor, Charles R.
Two modifications to an earlier published design for an electronic pH meter.
Eisnor, Charles R. J. Chem. Educ. 1982, 59, 240.
Laboratory Equipment / Apparatus |
pH
The construction of inexpensive digital pH meters  Warner, Brian D.; Boehme, Gerhard; Pool, Karl L.
Parts list and circuit diagram for a low-cost pH meter.
Warner, Brian D.; Boehme, Gerhard; Pool, Karl L. J. Chem. Educ. 1982, 59, 65.
Laboratory Equipment / Apparatus |
pH |
Acids / Bases |
Quantitative Analysis
Soil analysis for high school chemistry students  Eisenmann, Mary A.
Students examine the solubility of nitrate ions, the insolubility of iron hydroxide and iron carbonate, and the reaction between acid and carbonates.
Eisenmann, Mary A. J. Chem. Educ. 1980, 57, 897.
Agricultural Chemistry |
Plant Chemistry |
Applications of Chemistry |
Geochemistry |
Acids / Bases |
pH |
Oxidation / Reduction |
Precipitation / Solubility |
Aqueous Solution Chemistry
An extra function for the manual temperature compensation control on pH meters  Eilbeck, W. John
The manual temperature compensation control on pH meters changes the RT/F slope.
Eilbeck, W. John J. Chem. Educ. 1980, 57, 834.
Laboratory Equipment / Apparatus |
pH
An acid or a base?  Uriarte, Richard J.
Does a diluted acid remain acidic?
Uriarte, Richard J. J. Chem. Educ. 1980, 57, 806.
Acids / Bases |
pH |
Solutions / Solvents |
Aqueous Solution Chemistry
Apple dunking  O'Connor, Rod
Question regarding the ratio between ions of p-nitrophenylhydrazone in reducing the pH of basic effluent.
O'Connor, Rod J. Chem. Educ. 1980, 57, 598.
Acids / Bases |
Aqueous Solution Chemistry |
Solutions / Solvents |
pH |
Industrial Chemistry
Significant digits: Numbers and their logarithms  Clever, H. Lawrence
The number of digits to report in a base 10 logarithm is an unresolved problem for many students.
Clever, H. Lawrence J. Chem. Educ. 1979, 56, 824.
Chemometrics |
pH
Chemistry tutorial programs on display terminals  Heit, M.; Jones, W. E.; Wasson, John

Heit, M.; Jones, W. E.; Wasson, John J. Chem. Educ. 1979, 56, 787.
Acids / Bases |
pH
Thermal buffers: An illustrative analogy  Macomber, Roger S.
An analogy between acid-base buffer behavior and the thermal behavior of a two-phase (solid and liquid) system.
Macomber, Roger S. J. Chem. Educ. 1979, 56, 710.
Acids / Bases |
pH
Isoenzymes  Daugherty, N. A.
The separation, identification, and measurement of isoenzymes is an appropriate topic for a special lecture in general chemistry.
Daugherty, N. A. J. Chem. Educ. 1979, 56, 442.
Enzymes |
Proteins / Peptides |
pH |
Electrophoresis |
Separation Science |
Electrochemistry |
Applications of Chemistry
Titration curve for a programmable pocket calculator  Williams, Howard P.
A titration curve program written for a TI-58 or TI-59 programmable pocket calculator.
Williams, Howard P. J. Chem. Educ. 1979, 56, 237.
Acids / Bases |
pH |
Titration / Volumetric Analysis |
Quantitative Analysis
Comparison of strong acid and weak acid titration curves  Schultz, C. W.; Spannuth, S. L.
Allows comparison of mechanically reproduced titration curves of strong acid and one or more weak acids versus strong base on the same piece of paper.
Schultz, C. W.; Spannuth, S. L. J. Chem. Educ. 1979, 56, 194.
Acids / Bases |
Titration / Volumetric Analysis |
Quantitative Analysis |
pH
The standardization of pH meters: A comparison of procedures for different types of instruments  Lund, Walter
Discusses the various approaches to the standardization of pH meters and the limitations of the various procedures.
Lund, Walter J. Chem. Educ. 1979, 56, 129.
Instrumental Methods |
pH |
Laboratory Equipment / Apparatus |
Laboratory Management |
Calibration |
Acids / Bases
The pH concept  Kolb, Doris
Reviews pH, the pH scale, pH calculations, buffered solutions, and measuring pH.
Kolb, Doris J. Chem. Educ. 1979, 56, 49.
pH |
Aqueous Solution Chemistry |
Acids / Bases
Buffer effect demonstration on the overhead projector  Hobe, Paul G., Jr.
Illustrates that one drop of dilute acid or base will change the pH of water by a large amount while larger amounts can be added to a buffer solution before any change is noted.
Hobe, Paul G., Jr. J. Chem. Educ. 1979, 56, 47.
Acids / Bases |
pH
Conjugate acid-base mixtures in the general chemistry laboratory. A comprehensive buffer experiment  Wiger, George R.; de la Camp, Ulrich
A very exact and detailed procedure for a comprehensive buffer experiment is presented in this paper.
Wiger, George R.; de la Camp, Ulrich J. Chem. Educ. 1978, 55, 401.
Acids / Bases |
pH
Determination of the percent Na4EDTA in bathroom cleaners  Kump, K. I.; Palocsay, F. A.; Gallaher, T. N.
There has been much publicity recently about the importance and virtues of relevant experiments in chemistry lab courses. This experiment is for the general chemistry student involving the analysis of bathroom cleaners and determining the concentration of active ingredients.
Kump, K. I.; Palocsay, F. A.; Gallaher, T. N. J. Chem. Educ. 1978, 55, 265.
Titration / Volumetric Analysis |
pH |
Consumer Chemistry |
Quantitative Analysis
Determination of pKa using the half-volume method: A laboratory experiment  Stephens, S. Jane; Jonich, Michael J.
The equivalence point of an unknown acid is found; the value of pKa is read directly from the titration curve using the "half-volume" method.
Stephens, S. Jane; Jonich, Michael J. J. Chem. Educ. 1977, 54, 711.
pH |
Titration / Volumetric Analysis |
Quantitative Analysis
Questions [and] Answers  Campbell, J. A.
330-333. Four questions and their answers; includes comments made by readers on earlier questions 130, 153, 154, 171, 172, 181.
Campbell, J. A. J. Chem. Educ. 1977, 54, 678.
Enrichment / Review Materials |
Atmospheric Chemistry |
Applications of Chemistry |
Electrochemistry |
Electrolytic / Galvanic Cells / Potentials |
Metals |
pH
Emphasis on acids and bases  J. Chem. Educ. Staff
Considers the acidity or basicity in soils and natural waters; the acid-base balance in body chemistry; acidic and basic foods; the approximate pH values of common fluids; examples of acidic, basic, and neutral drugs; and the commercial preparation of nitric acid.
J. Chem. Educ. Staff J. Chem. Educ. 1977, 54, 626.
Acids / Bases |
Water / Water Chemistry |
Food Science |
Applications of Chemistry |
pH |
Drugs / Pharmaceuticals
pH of hair shampoos. A topical high school experiment  Griffin, John J.; Corcoran, Robert F.; Akana, Kenn K.
Investigates the pH of hair shampoos and the effect of pH on cleansing hair.
Griffin, John J.; Corcoran, Robert F.; Akana, Kenn K. J. Chem. Educ. 1977, 54, 553.
pH |
Consumer Chemistry
Lecture demonstration digital multimeter  Myers, Gardiner H.; Dugan, Robert J.
Plans for a Lecture Demonstration Digital Multimeter used to measure and display electric potential, current, temperature, pressure, and pH.
Myers, Gardiner H.; Dugan, Robert J. J. Chem. Educ. 1977, 54, 495.
Laboratory Equipment / Apparatus |
pH |
Electrochemistry
Adapting a pH meter for lecture demonstrations: Construction of an auxiliary scale for overhead projectors  Stanko, Joseph A.; Haas, Charles G.; Lotz, John R.
A pH meter adopted for display on an overhead.
Stanko, Joseph A.; Haas, Charles G.; Lotz, John R. J. Chem. Educ. 1977, 54, 365.
Acids / Bases |
pH
The effects of HCl and aspirin on the stomach: An equilibrium review  DeLorenzo, Ronald
The chemical effect and medical implications of taking aspirin.
DeLorenzo, Ronald J. Chem. Educ. 1977, 54, 306.
Equilibrium |
Acids / Bases |
pH |
Drugs / Pharmaceuticals |
Medicinal Chemistry |
Applications of Chemistry
Effect of Ionic Strength on Equilibrium Constants  Seymour, M. D.; Fernando, Quintus
Involves the determination of the acid dissociation constant of bromcresol green by a spectrophotometric method; using a graphing calculator, each student can perform the laboratory work and obtain his own data set.
Seymour, M. D.; Fernando, Quintus J. Chem. Educ. 1977, 54, 225.
Acids / Bases |
Aqueous Solution Chemistry |
Equilibrium |
pH
Separation of an APC mixture. A quantitative analysis experiment  Haddad, Paul; Rasmussen, Malcolm
In this paper the well known technique of pH, controlled extractive separation of a mixture of an acidic, basic, and neutral organic substance has been applied to separation and analysis of a mixture of the drugs aspirin, caffeine, and phenacetin.
Haddad, Paul; Rasmussen, Malcolm J. Chem. Educ. 1976, 53, 731.
Drugs / Pharmaceuticals |
pH |
Acids / Bases |
Separation Science
An Effective demonstration of the behavior of indicators and biochemicals in buffers   Lerman, Charles L.
The author has found this demonstration of buffers useful for both freshman level courses and as a refresher in biochemistry.
Lerman, Charles L. J. Chem. Educ. 1976, 53, 634.
Acids / Bases |
pH
A new buffer demonstration  Friedman, Norman
An Alka-Seltzer tablet in water is used as a buffer system and its resistance to changes in pH are compared to solutions of buffered aspirin and aspirin.
Friedman, Norman J. Chem. Educ. 1975, 52, 605.
Acids / Bases |
pH |
Consumer Chemistry
Protective cover for glass electrodes  DeWitt, H. D.
Slipping a piece of perforated vinyl tubing over the end of a glass electrode.
DeWitt, H. D. J. Chem. Educ. 1975, 52, 498.
Laboratory Equipment / Apparatus |
pH |
Acids / Bases
Questions [and] Answers  Campbell, J. A.
193-197. Five biochemical questions and their answers.
Campbell, J. A. J. Chem. Educ. 1975, 52, 457.
Enrichment / Review Materials |
pH |
Isotopes |
Water / Water Chemistry
Questions [and] Answers  Campbell, J. A.
180-183. Four biochemistry questions and their answers.
Campbell, J. A. J. Chem. Educ. 1975, 52, 241.
Enrichment / Review Materials |
Photochemistry |
Photosynthesis |
Acids / Bases |
pH
A new chemistry program for nursing and allied health students  Stanitski, Conrad L.; Sears, Curtis T., Jr.
Outlines and discusses the topics considered in a chemistry program for nursing and allied health students.
Stanitski, Conrad L.; Sears, Curtis T., Jr. J. Chem. Educ. 1975, 52, 226.
Nonmajor Courses |
Applications of Chemistry |
Medicinal Chemistry |
Oxidation / Reduction |
Catalysis |
Acids / Bases |
pH |
Metabolism |
Drugs / Pharmaceuticals
An easily fabricated pH cell  Hendrixson, R. R.
A pH cell for use in titration experiments where the solution should be protected from the air.
Hendrixson, R. R. J. Chem. Educ. 1975, 52, 109.
Laboratory Equipment / Apparatus |
pH |
Quantitative Analysis |
Acids / Bases |
Titration / Volumetric Analysis
A computer program for the analysis of titration data  Scholler, D. M.; Lyndrup, M. L.
A computer program to analyze titration data for monoprotic and diprotic acids.
Scholler, D. M.; Lyndrup, M. L. J. Chem. Educ. 1975, 52, 106.
Titration / Volumetric Analysis |
Quantitative Analysis |
Acids / Bases |
pH
A simple, effective demonstration of titration curves and indicator selection  Nathan, Lawrence C.
The concepts of acid-base titration curves and selection of the appropriate indicator for an acid-base titration can be easily and effectively demonstrated by use of a potentiometric titration.
Nathan, Lawrence C. J. Chem. Educ. 1973, 50, 262.
Acids / Bases |
Dyes / Pigments |
Titration / Volumetric Analysis |
pH |
Quantitative Analysis
Questions [and] Answers  Campbell, J. A.
Five questions requiring an application of chemical principles and their solutions.
Campbell, J. A. J. Chem. Educ. 1973, 50, 128.
Enrichment / Review Materials |
Proteins / Peptides |
pH |
Carbohydrates |
Molecular Properties / Structure
pH range -47 to +47?  Pilar, Frank L.
The author of the cited article corrects a mistake in his original manuscript.
Pilar, Frank L. J. Chem. Educ. 1972, 49, 851.
Acids / Bases |
pH |
Aqueous Solution Chemistry
Preparation of solutions in the pH range of approximately -47 to +47  Pilar, Frank L.
By adding more and more water to an acidic solution, one can produce as high a pH as desired.
Pilar, Frank L. J. Chem. Educ. 1972, 49, 776.
pH |
Acids / Bases |
Aqueous Solution Chemistry
An interactive program for teaching pH and logarithms  Eskinazi, Jak; Macero, Daniel J.
A computer program written in APL for teaching students logarithms and pH calculations.
Eskinazi, Jak; Macero, Daniel J. J. Chem. Educ. 1972, 49, 571.
pH |
Acids / Bases |
Chemometrics
Measurement of pH of distilled water  Youmans, Hubert L.
Resolving the problem of pH meters giving readings for the pH of distilled water that differ significantly from 7.
Youmans, Hubert L. J. Chem. Educ. 1972, 49, 429.
Water / Water Chemistry |
pH |
Quantitative Analysis
Programmable calculators. Simulated experiments  Runquist, O.; Olsen, Rodney; Snadden, Bruce
Describes how titration and reaction rate experiments can be simulated on a programmable calculator.
Runquist, O.; Olsen, Rodney; Snadden, Bruce J. Chem. Educ. 1972, 49, 265.
Acids / Bases |
Titration / Volumetric Analysis |
Quantitative Analysis |
Rate Law |
Kinetics |
pH
Pain: A chemical explanation  Plumb, Robert C.; Lindahl, Olov
In sensing pain the nervous system acts like a pH meter.
Plumb, Robert C.; Lindahl, Olov J. Chem. Educ. 1972, 49, 179.
pH |
Acids / Bases |
Applications of Chemistry |
Medicinal Chemistry
The hydrolysis of 4-nitrophenol phosphate. A freshman class investigation  Hopkins, Harry P., Jr.; Mather, Jane H.
A study of the hydrolysis of 4-nitrophenol phosphate is made the basis of a biochemistry-oriented quarter in freshman chemistry; after completing the simple hydrolysis studies, the student proceeds to investigate the enzymatic hydrolysis of 4-nitrophenol phosphate.
Hopkins, Harry P., Jr.; Mather, Jane H. J. Chem. Educ. 1972, 49, 126.
Reactions |
pH |
Esters |
Enzymes |
Catalysis
Acid-base reaction parameters  Freiser, Henry
The author demonstrates how the combined algebraic graphical approach can be extended to acid-base titration curve calculations as well as to buffer and sharpness index formulation.
Freiser, Henry J. Chem. Educ. 1970, 47, 809.
Acids / Bases |
pH |
Titration / Volumetric Analysis |
Chemometrics
Ratio diagrams: A simple graphical representation of complicated equilibria  de Levie, R.
Introduces and demonstrates the usefulness and general applicability of ratio diagrams as the simplest graphical representation of equilibria involving mononuclear species.
de Levie, R. J. Chem. Educ. 1970, 47, 187.
Equilibrium |
Acids / Bases |
pH |
Aqueous Solution Chemistry |
Precipitation / Solubility
Hydrolysis of sodium carbonate  Nakayama, F. S.
Presents a procedure for obtaining the ion concentrations of the various component species produced by the hydrolysis of sodium carbonate.
Nakayama, F. S. J. Chem. Educ. 1970, 47, 67.
Aqueous Solution Chemistry |
Chemometrics |
pH
Component concentrations in solutions of weak acids  Goldish, Dorothy M.
presents a new approach to teaching the subject of weak acid equilibria and its associated calculations.
Goldish, Dorothy M. J. Chem. Educ. 1970, 47, 65.
Acids / Bases |
Aqueous Solution Chemistry |
Equilibrium |
Chemometrics |
pH
Computer programs for calculating pH  Schlessinger, Gert G.
A brief note on the availability of a Fortran II program for calculating the pH of weak acids and bases and salts of these species in aqueous solution.
Schlessinger, Gert G. J. Chem. Educ. 1969, 46, 680.
Acids / Bases |
pH |
Aqueous Solution Chemistry
A versatile reagent for general chemistry  Dauphinee, G. A.; Heit, M. L.
This short note lists seven general chemistry experiments on various aspects of potassium hydrogen oxalate.
Dauphinee, G. A.; Heit, M. L. J. Chem. Educ. 1969, 46, 660.
Acids / Bases |
pH |
Titration / Volumetric Analysis |
Qualitative Analysis
Graphical method for acidity constants  Heck, Ludwig
The author presents a graphical method for the determination of acidity constants of very weak acids.
Heck, Ludwig J. Chem. Educ. 1969, 46, 535.
Acids / Bases |
Aqueous Solution Chemistry |
pH
Monoprotic or diprotic?  Goldman, James A.
The author demonstrates that the results of an earlier article are not altogether unexpected.
Goldman, James A. J. Chem. Educ. 1969, 46, 123.
Acids / Bases |
Aqueous Solution Chemistry |
pH
Chemical queries. Especially for introductory chemistry teachers  Young, J. A.; Malik, J. G.
(1) Is there such a thing as a negative pH value? Or one above 14? (2) What is entropy, in terms a beginner may understand? (3) On calculating the molecular weight of a solute from concentration and freezing point depression.
Young, J. A.; Malik, J. G. J. Chem. Educ. 1969, 46, 36.
Acids / Bases |
Aqueous Solution Chemistry |
pH |
Thermodynamics |
Molecular Properties / Structure
Circular slide rule conversion of pH to [H+]  Grimm, Larry C.
This short note discusses the use of a circular slide rule to convert pH to [H+].
Grimm, Larry C. J. Chem. Educ. 1969, 46, 22.
Chemometrics |
Acids / Bases |
pH |
Aqueous Solution Chemistry
Carbon and its inorganic compounds. C. Carbon dioxide   Colo, August J.; Klug, Evangeline B.; Alyea, Hubert N.
Demonstrations include rising mothballs with CO2, dry ice into limewater, and producing school colors: CO2 changing pH.
Colo, August J.; Klug, Evangeline B.; Alyea, Hubert N. J. Chem. Educ. 1968, 45, A517.
pH
Errors in calculating hydrogen ion concentration  House, J. E., Jr.; Reiter, R. C.
The possibility of avoiding the full quadratic calculation in determining hydrogen ion concentration depends on both the dissociation constant and the concentration of the acid or base.
House, J. E., Jr.; Reiter, R. C. J. Chem. Educ. 1968, 45, 679.
Acids / Bases |
Aqueous Solution Chemistry |
pH
Corrections for simple equations for titration curves of monoprotic acids  Cortelyou, W. P.
Presents corrections for simple equations for titration curves of monoprotic acids and their derivations.
Cortelyou, W. P. J. Chem. Educ. 1968, 45, 677.
Acids / Bases |
Titration / Volumetric Analysis |
pH |
Aqueous Solution Chemistry
Is a weak acid monoprotic? A new look at titration curves  Sturrock, Peter E.
It is suggested that experimental values of ?pH may be employed as a simple, yet sensitive, criterion to determine whether an unknown acid is monoprotic.
Sturrock, Peter E. J. Chem. Educ. 1968, 45, 258.
Acids / Bases |
Aqueous Solution Chemistry |
Titration / Volumetric Analysis |
pH
The acid base calculator  Flack, Arnold
This short note describes an acid base calculator designed to assist in the teaching of logarithmic relationships.
Flack, Arnold J. Chem. Educ. 1967, 44, 466.
Acids / Bases |
pH
A pH scaler  Alpern, D. K.
Describes a convenient pocket size scale made using log paper and a linear graph sheet.
Alpern, D. K. J. Chem. Educ. 1967, 44, 330.
pH |
Acids / Bases |
Aqueous Solution Chemistry
Simple equipment for automatic potentiometric pH titrations  Olsen, Eugene D.
This paper describes a simple yet versatile apparatus employing a siphon pipet to deliver titrant solution automatically and accurately during the course of a titration.
Olsen, Eugene D. J. Chem. Educ. 1966, 43, 310.
pH |
Titration / Volumetric Analysis |
Electrochemistry |
Aqueous Solution Chemistry |
Quantitative Analysis |
Laboratory Equipment / Apparatus
Letter to the editor  Roberts, N. K.
Discusses the action of buffer solutions to resist changes in pH.
Roberts, N. K. J. Chem. Educ. 1966, 43, 108.
Acids / Bases |
pH |
Aqueous Solution Chemistry
A computer program for use in teaching chemical equilibrium  Zajicek, O. T.
Describes a computer program for use in teaching chemical equilibrium.
Zajicek, O. T. J. Chem. Educ. 1965, 42, 622.
Equilibrium |
Acids / Bases |
pH
Slide rule conversion of [H+] to pH  Irby, Bobby N.
Describes a method for the conversion of [H+] to pH using a slide rule.
Irby, Bobby N. J. Chem. Educ. 1965, 42, 546.
pH
Teaching ionic equilibrium: Use of log chart transparencies  Freiser, Henry; Fernando, Quintus
The use of graphical methods brings the problem of significance of various terms in complicated expressions into proper focus. Furthermore, a pictorial representation permits the student to see at a glance how the concentrations of various species in a system at equilibrium change with conditions.
Freiser, Henry; Fernando, Quintus J. Chem. Educ. 1965, 42, 35.
Aqueous Solution Chemistry |
Equilibrium |
Acids / Bases |
pH |
Chemometrics |
Brønsted-Lowry Acids / Bases
Solubility and pH Calculations (Butler, James N.)  Ramette, R. W.

Ramette, R. W. J. Chem. Educ. 1964, 41, A970.
Aqueous Solution Chemistry |
Precipitation / Solubility |
pH |
Acids / Bases |
Chemometrics |
Enrichment / Review Materials
Overhead projection with the pH meter  Hoff, Darrel B.
Describes a means of projecting an image of a pH meter.
Hoff, Darrel B. J. Chem. Educ. 1964, 41, 662.
pH |
Acids / Bases |
Aqueous Solution Chemistry |
Titration / Volumetric Analysis
The hydration of carbon dioxide: A double clock experiment  Jones, P.; Haggett, Max L.; Longridge, Jethro L.
This extension of the "Soda Water Clock" experiment provides a quantitative kinetics investigation.
Jones, P.; Haggett, Max L.; Longridge, Jethro L. J. Chem. Educ. 1964, 41, 610.
Reactions |
Rate Law |
Kinetics |
pH |
Acids / Bases |
Aqueous Solution Chemistry
Automatic titrimetry in introductory college chemistry  Zajicek, O. T.
The experiment described here employs an automatic pH titrator as a tool for the teaching of a detailed treatment of simultaneous equilibria.
Zajicek, O. T. J. Chem. Educ. 1964, 41, 554.
Titration / Volumetric Analysis |
pH |
Aqueous Solution Chemistry |
Acids / Bases |
Equilibrium
A versatile and inexpensive pH recording electrometer  Malmstadt, H. V.
Presents the design and operation of a modular pH unit with automatic temperature compensation.
Malmstadt, H. V. J. Chem. Educ. 1964, 41, 148.
pH |
Acids / Bases |
Aqueous Solution Chemistry
Development of the pH concept: A historical survey  Szabadvary, Ferenc; Oesper, Ralph E., trans.
Traces the historical development of the following: a recognition of the importance of hydrogen ion concentration; an understanding of buffer solutions; and the concept and measurement of pH.
Szabadvary, Ferenc; Oesper, Ralph E., trans. J. Chem. Educ. 1964, 41, 105.
pH |
Acids / Bases |
Aqueous Solution Chemistry
An easily prepared wide range buffer series  Carmody, W. R.
Provides suggestions for research to accompany earlier published articles.
Carmody, W. R. J. Chem. Educ. 1963, 40, A386.
Undergraduate Research |
Acids / Bases |
pH |
Aqueous Solution Chemistry
Effect of chloride ion on precipitation of cadmium sulfide  O'Donnell, T. A.
Adding NaCl or KCl to suspended CdS causes the suspension to disappear.
O'Donnell, T. A. J. Chem. Educ. 1963, 40, A313.
Precipitation / Solubility |
pH |
Equilibrium
Precipitation from homogeneous solution  Gordon, L.; Salesin, E. D.
Suggests research questions based on an earlier published article.
Gordon, L.; Salesin, E. D. J. Chem. Educ. 1963, 40, A306.
Undergraduate Research |
Solutions / Solvents |
Precipitation / Solubility |
pH
Making baking powder biscuits: A practical experiment on hydrolysis of salts  Rainey, R. C.
A "take home" experiment tying together the topics of the hydrolysis of salts and their effects on the pH of water solutions.
Rainey, R. C. J. Chem. Educ. 1962, 39, 363.
Consumer Chemistry |
pH
Laboratory group exercises in acid-base theory  Zuehlke, R. W.
An experiment to introduce the topic of acid-base titrimetry and illustrate the properties of acids and bases.
Zuehlke, R. W. J. Chem. Educ. 1962, 39, 354.
Acids / Bases |
Titration / Volumetric Analysis |
pH
Demonstrations for the overhead projector  Spiegler, K. S.; Gruenberg, J.; Trattner, Adriana; Weiss, W.
Demonstrations include the production of iron, potentiometric titration, photography, and the measurement of pH by indicators.
Spiegler, K. S.; Gruenberg, J.; Trattner, Adriana; Weiss, W. J. Chem. Educ. 1962, 39, 86.
Titration / Volumetric Analysis |
pH |
Aqueous Solution Chemistry |
Acids / Bases
Easily prepared wide range buffer series  Carmody, Walter R.
A series of buffers with pH values ranging from 2.0 to 12.0 that requires the preparation of only two stock solutions and requires only three common chemicals.
Carmody, Walter R. J. Chem. Educ. 1961, 38, 559.
Aqueous Solution Chemistry |
Acids / Bases |
pH |
Laboratory Management
Is there an alternative to pH?  Crane, Francis E., Jr.
Provides some alternatives to the traditional definition of pH that introductory students may find more intuitive and less confusing.
Crane, Francis E., Jr. J. Chem. Educ. 1961, 38, 365.
pH |
Acids / Bases |
Nomenclature / Units / Symbols
pH meters (continued)  Lewin, S. Z.
Considers the standardization, calibration, and testing of pH meters, as well as Beckman pH meters.
Lewin, S. Z. J. Chem. Educ. 1959, 36, A595.
Instrumental Methods |
pH |
Acids / Bases |
Aqueous Solution Chemistry |
Calibration
pH meters  Lewin, S. Z.
Examines the operation and individual components of pH meters.
Lewin, S. Z. J. Chem. Educ. 1959, 36, A477.
Laboratory Equipment / Apparatus |
pH |
Acids / Bases
Exact colorimetric pH determination  Stedman, D. F.
Various combinations of three dyes - brom cresol green, methyl red, and brom phenol blue - are used to determine pH values from 4.3 to 5.8.
Stedman, D. F. J. Chem. Educ. 1958, 35, 456.
pH |
Dyes / Pigments |
Aqueous Solution Chemistry
Research project for general chemistry laboratory  Schwolow, Jean
In order to modify the routine experiment in which students know the answers before ever entering the laboratory, freshmen were presented with a simulated research project connected with acids, bases, and pH measurements.
Schwolow, Jean J. Chem. Educ. 1958, 35, 416.
Undergraduate Research |
Acids / Bases |
pH |
Aqueous Solution Chemistry
Universal indicator for pH 1-13  Richardson, F. R.
Describes a mixture of indicators that serves as a universal indicator for pH 1-13.
Richardson, F. R. J. Chem. Educ. 1956, 33, 517.
Dyes / Pigments |
Acids / Bases |
pH |
Aqueous Solution Chemistry
Indicators and the basis for their use  Gorin, George
Describes the method for selecting appropriate indicators and the teaching of this subject.
Gorin, George J. Chem. Educ. 1956, 33, 318.
Dyes / Pigments |
Titration / Volumetric Analysis |
Acids / Bases |
Aqueous Solution Chemistry |
Quantitative Analysis |
pH
Amphoteric molecules, ions and salts  Davidson, David
It is the aim of this paper to call attention to the splendid opportunity amphoteric substances afford for the teaching of acid-base principles.
Davidson, David J. Chem. Educ. 1955, 32, 550.
Molecular Properties / Structure |
Acids / Bases |
pH |
Aqueous Solution Chemistry
Pocket slide rule for pH calculations  Pitzer, Edgar C.
A pocket slide rule may be used for direct conversion from hydrogen-ion activity to pH, or vice versa, without the need for arithmetical computation.
Pitzer, Edgar C. J. Chem. Educ. 1955, 32, 300.
pH |
Aqueous Solution Chemistry |
Chemometrics
A general equation for approximate hydronium ion calculations  Drenan, James W.
Presents a general equation for simplifying calculations of the hydronium ion.
Drenan, James W. J. Chem. Educ. 1955, 32, 36.
Acids / Bases |
Aqueous Solution Chemistry |
pH |
Chemometrics
A log table for pH problems  Condon, Francis E.
Provides a readily remembered log table suitable for computing pH from hydronium-ion concentration and the reverse.
Condon, Francis E. J. Chem. Educ. 1954, 31, 323.
pH |
Chemometrics |
Acids / Bases |
Aqueous Solution Chemistry
pH approximations  McBay, Arthur J.
Describes the use of data from tables to approximate pH values.
McBay, Arthur J. J. Chem. Educ. 1952, 29, 526.
pH |
Acids / Bases |
Aqueous Solution Chemistry