A Study of the Use of Solubility Isotherms to Obtain Information about Ion Hydration and Ion Pairing in Concentrated Solutions of Electrolytes

Abstract

Computational analysis of solubility isotherms in ternary systems consisting of water and two solutes having a common ion was suggested and the respective software was developed. This hydration analysis was applied to model systems NH4CNS - NaCNS - H2O at 5, 25 and 50 °C and NaX - KX - H2O (X = Cl, Br, I) at 25 °C. The results obtained are discussed and the way in which the hydration analysis gives information on ionic processes in saturated electrolyte solutions is demonstrated.