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.