Certain inorganic salts are known to promote the development of charge separations during the linear freezing of their dilute solutions. These same salts strongly influence the morphology, the aggregation, and the secondary ice nucleation characteristics of growing single ice crystals in laboratory cloud chamber experiments. To explain these cloud chamber results, a mechanism for the development of the charge separations is proposed in which hydronium and hydroxyl ions are shown to be the potential-determining ions in a pH-dependent process. Electrochemical double layers are postulated to occur on the growing single crystal faces with anions or cations present as counterions in the double layers. This mechanism obviates the requirement for the inclusion of a wide range of chemically different anions and cations in the ice phase as advocated in previous publications.