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ERIC Number: EJ820759
Record Type: Journal
Publication Date: 2007-Mar
Pages: 6
Abstractor: As Provided
Reference Count: 16
ISSN: ISSN-0021-9584
Predominance Diagrams, a Useful Tool for the Correlation of the Precipitation-Solubility Equilibrium with Other Ionic Equilibria
Pereira, Constantino Fernandez; Alcalde, Manuel; Villegas, Rosario; Vale, Jose
Journal of Chemical Education, v84 n3 p520-525 Mar 2007
The four types of ionic equilibria--acid-base, redox, precipitation, and complexation--have certain similarities, which has led some authors to develop a unified treatment of them. These authors have highlighted the common aspects and tried to find a systemization of the equilibria that would facilitate learning them. In this unified treatment, ionic reactions are interpreted as particle exchanges--involving protons, electrons, or ligands--between a donor and an acceptor of two conjugate pairs. The unified treatment proposes a graphic solution to the equilibria problems, using diagrams that employ the logarithm of the concentration of the exchanged particle as the variable. This paper presents the application of the precipitation-solubility equilibrium and describes the usefulness of such diagrams for solving solubility problems. (Contains 2 tables, 1 figure, and 2 notes.)
Division of Chemical Education of the American Chemical Society. Subscription Department, P.O. Box 1267, Bellmawr, NJ 08099-1267. Tel: 800-691-9846; Tel: 856-931-5825; Fax: 856-931-4115; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Brazil