Abstract
Transference numbers in concentrated copper(II) chloride solutions at 25°C are obtained by (i) a modified moving boundary method using other solutions to isolate both electrodes from the CuCl2 solution, and (ii) the e.m.f. method using cells with transference with gaseous chlorine electrodes. Conductance and density measurements are also reported. The transference results support the more recent Russian work against the earlier measurements of Denham; there is no evidence of negative cation constituent transference numbers, and it is concluded that anionic chloro complexes are not a major constituent of the concentrated solutions. In this respect copper(II) chloride differs from the halides of cadmium and zinc.
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