Electrochemical studies of molten salts. III. E.M.F.'s of concentration cells with transference and diffusion potentials for PbCl₂+CsCl mixtures

Abstract

The e.m.f.'s of concentration cells with transference containing PbC1₂ + CsCl molten mixtures have been measured as functions of temperature and electrolyte composition. Graphs of cell e.m.f. against temperature are sets of intersecting straight lines, as are graphs of cell e.m.f. against the negative logarithm of the mole fraction of PbCl₂. Diffusion potentials for junctions between pure molten PbCl₂ and molten PbCl₂ + CsCl mixtures have been determined, as functions of temperature and mixture composition. The results are interpreted to indicate the existence of complex lead-chloride ionic species in the mixtures.