Summary of the Pitzer Model

We have presented the Pitzer equations describing activity and osmotic coefficients of multi-component salt solutions, but probably no brief summary will suffice to get you started if you actually want to use these equations to model real systems. The most useful summaries are probably Pitzer (in Pytkowicz (1979) and in Carmichael and Eugster (1987)) and Weare (in Carmichael and Eugster (1987)). 

The truly remarkable thing about the Pitzer equations (17.40) to (17.42) is that the above parameters derived from one- and two-salt systems can be used with extraordinary success to predict behavior in systems containing many more ionic components. Use of the Pitzer equations to predict activities in very complex salt solutions requires data for the single-salt parameters f MX I MX C mx for possible com- 

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