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  Home > JCE Print > Journal of Chemical Education > Issues > 2001  > May  >
In the Classroom
Evaluating Solubility of Sparingly Soluble Diprotic Acid Salts
Jean M. Nigretto
UFR Sciences et Techniques, Université de Cergy-Pontoise, 5 Mail Gay Lussac - Neuville sur Oise, 95031 Cergy-Pontoise Cedex, France
Cover
May 2001
Vol. 78 No. 5
p. 631
Abstract
Students often feel it is arduous to conduct solubility calculations owing to the apparent difficulty of dealing with the presence of a solid phase that is ignored in the mass balance. This is especially true when they have to calculate the pH of solutions containing sparingly soluble diprotic acid salts in pure water because the forms of the soluble acid-base predominating species depend on this pH. The use of logarithmic concentration diagrams provides a convenient tool for finding approximate solutions to such problems. An application of this method based on a series of carbonate salts is presented.
More Information
*  Citation
 Nigretto, Jean M. J. Chem. Educ. 2001 78 631.
*  Keywords
 AcidÐBase Chemistry; Analytical Chemistry; Aqueous Solution Chemistry; CER Problem Solving; Equilibrium; Solutions / Solvents; Teaching / Learning Aids
*  History
 Created:
Last Updated:		 March 22, 2001
August 31, 2005
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