Guggenheims Method for Multicomponent Solutions

Guggenheim s (1, 2) expression for the mean activity coefficient is applicable to multicomponent solutions. For the mean activity coefficient of an electrolyte of cation c and anion a. the equation is  

Expressions for the mean aotivity coeffioients rf ions can be derived from equations (5.1) and (5.1a). From (5.1a). the activity coefficient of cation c is  

As indicated in the previous chapter, Guggenheim s method for single electrolytes is accurate only to about an ionic strength of. 1 molal this limitation cannot be expected to improve for multicomponent solutions. 

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