Journal of Solution Chemistry

, Volume 17, Issue 10, pp 909–924 | Cite as

Thermodynamics of electrolyte mixtures. Activity and osmotic coefficients consistent with the higher-order limiting law for symmetrical mixing

  • Jia-zhen Yang
  • Kenneth S. Pitzer


The parameters for symmetrical mixing of ions of the same sign in the virial-coefficient (Pitzer) system are evaluated from literature data for 25°C in a manner consistent with the higher-order limiting law of Friedman. Twenty-four systems involve cation mixing with a common anion and fourteen involve anion mixing with a common cation. Heat of mixing data were similarly treated in a recent publication; the results give the temperature coefficients of some of these same parameters. The combined results yield the mixing parameters as functions of temperature on a basis both self-consistent and in accord with the limiting law. The results also yield, for a few systems without a common ion, predicted values in good agreement with experimental data.

Key words

Thermodynamics electrolyte mixtures activity coefficients osmotic coefficients Pitzer equations 


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Copyright information

© Plenum Publishing Corporation 1988

Authors and Affiliations

  • Jia-zhen Yang
    • 1
  • Kenneth S. Pitzer
    • 1
  1. 1.Department of Chemistry and Lawrence Berkeley LaboratoryUniversity of CaliforniaBerkeley

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