HYDROLYSIS OF MOLTEN ALKALI CHLORIDES, BROMIDES AND IODIDES.

Article abstract of DOI:10.1016/S0013-4686(98)80007-8

An electrochemical technique has been developed for studying equilibrium of the hydrolytic reactions of molten alkali chlorides, bromides, and iodides with exception of lithium salts. It consists of measuring the emf of the cells with gaseous electrodes. The equilibrium hydrolytic constant has been determined as a function of temperature. Expressions are obtained for its temperature dependence, this increases as temperature rises and the ionic potential of alkali cations decreases in the series from Na** plus to Cs** plus . Other things being equal, the hydrolysability of molten alkali halides diminishes in going from chlorides to iodides. The solutions of MOH in molten MX are shown to be close to a perfect mixture.