Conductances, densities, and viscosities of concentrated solutions of lithium chlorate and of sodium chlorate in water–dioxane mixtures, at 25°

Abstract

The conductances, densities, and viscosities of sodium chlorate and of lithium chlorate in the solvents 44.5% dioxane–55.5% water and 64.5% dioxane–35.5% water were determined, at 25 °C, almost up to saturation. The apparent molal volume of the electrolytes, calculated from the density data, was found to be greater in the dioxane–water solvents than it is in water, indicating a decrease in solvation in the mixed solvents. The relative viscosity increased as the dioxane content of the solvent increased, showing a larger ordering effect of the electrolytes as the solvent became less hydrogen bonded and less ordered. The equivalent conductance of both electrolytes was greatly reduced as the dioxane content of the solvent was increased, in accord with predictions based on solvent viscosity and dielectric properties. Also, sodium chlorate was found to be more associated than lithium chlorate in the mixed solvents.