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  Home > JCE Print > Journal of Chemical Education > Issues > 1998  > September  >
In the Classroom
Solving Chemical Equilibria
David Uribe
I.E.S. Antonio Gala, Avda de la Cañada 44, 28820 Coslada (Madrid), SPAIN
Cover
September 1998
Vol. 75 No. 9
p. 1177
Abstract
In this work, a method is described to solve chemical equilibria and to obtain the equilibrium concentrations. The technique is based on considering exclusively the variations of the concentrations of the species participating in the equilibria mixture, so that a number of algebraic equations (and unknowns) is obtained that is equal to the number of equilibrium equations. This represents a decrease in the number of algebraic equations compared with the conventional method for which, besides the equilibrium constants, the charge and mass balances must be considered. Besides, approximations that allow an easier solution of the problem can be frequently found. The treatment is presented in a clear and understandable form, and it is intended for teachers as well as for students. Two fully developed examples are proposed in order to illustrate the method. A reference to the conventional method is included, in both examples, for comparison purposes.
More Information
*  Citation
 Uribe, David. J. Chem. Educ. 1998 75 1177.
*  Keywords
 analytical chem, equilibrium, stoichiometry, aqueous solution chem
*  History
 Created:
Last Updated:		 June 21, 1999
June 24, 2005
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