| Journal Articles: 13 results |
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A Web-Based Interactive Module to Teach Acid–Base Principles of Drug Action Maria A. Hernandez and Jolanta Czerwinska
Describes interactive compressed video teleconferencing as the distance learning format for an entry-level doctor of pharmacy program.
Hernandez, Maria A.; Czerwinska, Jolanta. J. Chem. Educ. 2008, 85, 1704.
Acids / Bases |
Drugs / Pharmaceuticals
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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
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Unified Approximations: A New Approach for Monoprotic Weak Acid–Base Equilibria Harry L. Pardue, Ihab N. Odeh, and Teweldemedhin M. Tesfai
This article describes a new approach to approximate calculations for monoprotic acidbase equilibria in otherwise pure water. The new approach, identified herein as unified approximations, uses a simple decision criterion to select between situations that should be treated as deprotonation and protonation reactions. The remaining treatment takes account of changes in concentrations of conjugate acidbase pairs for all situations and ignores autoprotolysis only for situations for which the analytical concentration of either the conjugate acid or conjugate base will always be larger than zero.
Pardue, Harry L.; Odeh, Ihab N.; Tesfai, Teweldemedhin M. J. Chem. Educ. 2004, 81, 1367.
Acids / Bases |
Equilibrium |
Chemometrics
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Correction to Chemical Laboratory Information Profile: Anthracene (re J. Chem. Educ. 2002, 79, 553)
Response to the question "Can an indicator solution change color upon dilution?"
J. Chem. Educ. 2002, 79, 1071.
Acids / Bases
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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
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Comparisons and Demonstrations of Scientific Calculators Myung-Hoon Kim, Suw-Young Ly, and Tae-Kee Hong
Scientific calculators are compared in terms of their capacities, featuring many advantages of the graphic calculator over simple nongraphic calculators. Applications in this paper include a simulation of acid-base titration curves, and graphic display of a time course of concentrations of reactants and products for a chemical reaction with first-order kinetics.
Kim, Myung-Hoon; Ly, Suw-Young; Hong, Tae-Kee. J. Chem. Educ. 2000, 77, 1367.
Acids / Bases |
Kinetics |
Titration / Volumetric Analysis
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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
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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
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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
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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
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Acid-base half-reactions - A useful formalism for review lessons Atkinson, G. F.
An effective way to draw analogies between acid-base and redox effects while reviewing both.
Atkinson, G. F. J. Chem. Educ. 1979, 56, 238.
Oxidation / Reduction |
Reactions |
Acids / Bases |
Enrichment / Review Materials
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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
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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
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