| Journal Articles: 23 results |
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Titration of a Solid Acid Monitored By X-Ray Diffraction Keenan E. Dungey and Paul Epstein
Presents a solid-state laboratory in which students react fixed amounts of zirconium phosphate with increasing equivalents of NaOH(aq). From X-ray diffraction patterns, students calculate the interplanar spacings before and after the reaction. The spacings increase until the molar equivalence point is reached, indicating incorporation of the sodium ion into the crystal.
Dungey, Keenan E.; Epstein, Paul. J. Chem. Educ. 2007, 84, 122.
Acids / Bases |
Crystals / Crystallography |
Materials Science |
Solid State Chemistry |
X-ray Crystallography |
Titration / Volumetric Analysis
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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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Predicting Acid-Base Titration Curves without Calculations Dennis W. Barnum
In this paper a qualitative and systematic method for sketching titration curves is presented. Even the more complex cases such as salts or polyprotic acids and bases are treated just as easily as simple monoprotic acids. Having students predict the shape of titration curves from known equilibrium constants helps to focus attention on the general principles without distraction by the mathematics.
Barnum, Dennis W. J. Chem. Educ. 1999, 76, 938.
Acids / Bases |
Quantitative Analysis |
Water / Water Chemistry |
Equilibrium |
Learning Theories |
Titration / Volumetric Analysis |
Chemometrics
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Acid-Base Chemistry of the Aluminum Ion in Aqueous Solution Edward Koubek
A demonstration of the amphoteric behavior of aluminum is given based on an older report that was given many years ago.
Koubek, Edward. J. Chem. Educ. 1998, 75, 60.
Coordination Compounds |
Equilibrium |
Acids / Bases |
Aqueous Solution Chemistry
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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
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Chemical equilibrium: III. A few math tricks Gordus, Adon A.
The third article in a series on chemical equilibrium that considers a few math "tricks" useful in equilibrium calculations and approximations.
Gordus, Adon A. J. Chem. Educ. 1991, 68, 291.
Acids / Bases |
Equilibrium |
Chemometrics |
Titration / Volumetric Analysis
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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
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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
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Chemical principles for the introductory laboratory, CHM 384 (Johnson, James F.) Wegner, Carol
A comprehensive review of the title program which overviews basic techniques and concepts presented in introductory laboratory courses. Topics include: titration, equilibrium, Ksp, solubility, Beer's law, coordination complexes and first-order rates of reaction.
Wegner, Carol J. Chem. Educ. 1988, 65, A47.
Acids / Bases |
Titration / Volumetric Analysis |
UV-Vis Spectroscopy |
Equilibrium |
Solutions / Solvents |
Coordination Compounds |
Kinetics
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Chemistry: Stoichiometry and Chemistry: Acids and Bases ( Frazin, J. and partners) Bendall, Victor I.; Roe, Robert, Jr.
Two reviews of a software package that contains drill and practice programs that are suitable for beginning students of chemistry.
Bendall, Victor I.; Roe, Robert, Jr. J. Chem. Educ. 1986, 63, A204.
Stoichiometry |
Acids / Bases
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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
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The preparation of acid-base titration curves McClendon, Michael
A simple technique for generating mechanically plotted titration curves using an electron pH meter and a low-voltage chart recorder.
McClendon, Michael J. Chem. Educ. 1984, 61, 1022.
Acids / Bases |
Titration / Volumetric Analysis |
Laboratory Equipment / Apparatus |
Quantitative Analysis
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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
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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
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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
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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
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Acid-base titration and distribution curves Waser, Jurg
Presents an alternative method for the calculation of acid-base titration curves.
Waser, Jurg J. Chem. Educ. 1967, 44, 274.
Acids / Bases |
Titration / Volumetric Analysis |
Quantitative Analysis |
Aqueous Solution Chemistry
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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
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The ionization of polyhydric acids: Numerical results for phosphoric acid Cooke, S. L., Jr.
Presents calculated ionization values for phosphoric acid across the normal aqueous pH range.
Cooke, S. L., Jr. J. Chem. Educ. 1965, 42, 620.
Acids / Bases |
Equilibrium
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Computer program for the calculation of acid-base titration curves Emery, Allan R.
Describes the development of a computer program for the calculation of acid-base titration curves.
Emery, Allan R. J. Chem. Educ. 1965, 42, 131.
Titration / Volumetric Analysis |
Acids / Bases |
Aqueous Solution Chemistry |
Chemometrics
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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
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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
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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
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