Conductometric Study of Some Metal Halides in Glycerol + Water Mixtures

Electrolytic conductivities of potassium halides, KX (X = Cl−, Br− , I−) have been investigated in 10, 20, and 30 mass% glycerol + H2O mixtures at 298.0, 308.0, and 318.0 K. The conductance data have been analyzed by the Fuoss-conductance–concentration equation in terms of the limiting molar conductance ( 0), the association constant ( KA), and the distance of closest approach of ion (R). The association constant (KA) tends to increase in the order: 10 mass% < 20 mass% < 30 mass% glycerol + water mixtures, while it decreases with temperature. Thermodynamic parameters H0, G0, and S0 are obtained and discussed. Also, Walden products ( 0η) are reported. The results have been iInterpreted in terms of ion–solvent iInteractions and structural changes in the mixed solvents.