Conductivity of the Mixed Organic Electrolyte Containing Propylene Carbonate and 1,2‐Dimethoxyethane

Electrolytic conductivity of the organic solution dissolving has been studied at 30°C in the mixed system of propylene carbonate and 1,2‐dimethoxyethane. The variation of the conductivity with the solvent composition was explained on the basis of the changes in the dielectric constant and the viscosity of the solvent. With increasing the concentration of 1,2‐dimethoxyethane, the viscosity of the solvent lowers and then the ionic mobility increases, while the decrease in the dielectric constant tends to cause ion association. The critical distance for ion‐pair formation in Bjerrum's model was calculated for the mixed system, and the degree of ion association was estimated for each solution of the different solvent compositions. The mixing effect of the solvents on the conductivity was substantially accounted for by these parameters. It was also pointed out that ion‐solvent and solvent‐solvent interactions contribute to the improvement of the conductance to some extent.