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Solving Chemical Equilibria
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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.
Keywords (Audience):
Second-Year UndergraduateKeywords (Domain):
Analytical ChemistryKeywords (Subject):
EquilibriumTools
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History
- Received: August 03, 2009
ACS
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