ON THE SOLUBILITY OF AQUEOUS-ELECTROLYTES

The existence of a high-density phase separation for molecular and con tinuum solvent models of ion-water solutions are demonstrated using th e DRISM/HNC theory. The molecular lever effects which influence solubi lity and the inability of continuum models to exhibit some of these ef fects are discussed. The general trends in experimental alkali halide solubilities are found to be consistent with the present model calcula tions. The dependence of the phase separation on ion size is found to be primarily entropic in nature.