Abstract
Bjerrum has recently outlined an electrostatic theory of solubility applicable only to substances existing in the solid state as ionic lattices and completely dissociated in solution. The fundamental assumption is that the solubility of such a salt is chiefly dependent on the electrostatic forces between the solute ions and the solvent molecules. This is precisely the contention of Hildebrand if one remembers that other factors such as melting points, "molecular" weights and specific crystalline structure are at least very closely related to these electrostatic forces. In fact there is every reason to assume that such properties are actually determined by these electrostatic forces. Therefore, in view of the absence of any evidence to the contrary, one seems justified in assuming that solubility of salts within the limits of the present study, is an electrostatic phenomenon.