Activity Coefficients in Mixed Electrolytes

A practical problem frequently encountered by the analytical chemist is that of maintaining as nearly as possible a constant ionic environment while varying the concentration of one component of a mixture of electrolytes. For example, in evaluating the successive formation constants of halide complexes of a metal ion, it is necessary to vary the halide ion concentration over wide limits. The practice generally 

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Next, predictive equations for activity coefficients in mixed electrolyte solutions, based upon results in simpler ones, will be mentioned. The work of Brjlnsted (12) and of Guggenheim (13) led to the specific interaction equation... 

Reilly, P. J., Wood, R. H., and Robinson, R. A. The prediction of osmotic and activity coefficients in mixed-electrolyte solutions. Phys. Chem. 75, 1305-1315 (1971). 

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