Jürgen Geerlings, Joachim Richter, Lisbeth Rørmark, Harald A. Øye
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Activity coefficients and solubilities of the system (Ag/Cs)NO3-H2O from vapour pressure measurements
Vapour pressures of water over (Ag/Cs)NO3-H2O (0, 40, 60, and 100% AgNO3) are reported at three temperatures: 152,179, and 218 °C. The water activities derived from these data are fitted with equations for multicomponent electrolyte solutions developed by Van Laar and Pitzer (three models: Van Laar model, Pitzer-Van Laar model, Pitzer-Simonson model). With these models the mean activity coefficients of the salts and the solubilities of the pure salt components (AgNO3 or CsNO3) in the ternary mixture are calculated. The advantages of the Pitzer-Simonson model are underlined.
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