Activity coefficients for salts in water–methanol mixed solvent solutions

The approach tested in this work consists in adapting the Pitzer model, initially designed for aqueous electrolyte solutions, to the case of solutions with a mixed solvent. This modified model was applied to KCl, LiCl, CsCl, RbCl, HCl, NaCl and NaBr in methanol–water mixtures at 25°C. The results show that the calculated mean activity coefficients of the electrolytes studied are in good agreement with experimental values obtained from the literature.