The Diffusion Transfer of Several Kinds of Chlorides through Anion-exchange Membranes

Studies on Ion-exchange Transfer (8)

Abstract

In order to study an influence which non-counter ions exert by their kinds on the diffusion transfer of electrolytes ion-exchange membranes, the authors measured the diffusion velocity of several kinds of chlorides through the anion-exchange membranes. The results obtained were summerized as follows:
1. The diffusion velocity of chlorides increased as the concentration of the original solution became higher, but no linear relationship was found between the velocity and the concentration.
2. The velocity of hydrogen chloride was especially higher than that of the other kinds of chlorides.
3. The velocity of bivalent chlorides was lower than that of monovalent chlorides, and the order of the latter was as follows:
KCl>LiCl>NaCl
4. The amount of cations adsorbed by the membrane increased in proportion to the concentration of the original solution, and no big difference was found between these chlorides.
5. From the relationship between the amount adsorbed and the diffusion velocity of chlorides, it was presumed that the mobility of monovalent cation in the anion-exchange membrane decreased in the order mentioned below:
K⁺>Na⁺>Li⁺