Conductometric Study of Potassium Chloride in Ethanol - Water Mixtures

The molar conductivities of dilute solutions of potassium chloride in binary mixtures of ethanol and water were measured in the temperature range from 288.15 to 308.15 K at 5 K intervals. The experimental data were treated by the Lee-Wheaton conductivity equation and parameters. Lambda(o) and KA derived. The ionic limiting molar conductivities (lambda(o)) were obtained using the literature values of the cation limiting transference number t(o)(K+) from the same temperature range. The ionic Walden product. lambda(o)eta, thermodynamic quantities for the ion- association reaction (Delta G(o), Delta H-o and Delta S-o) and the activation enthalpy of the ionic movement Delta H-i* were calculated and discussed in terms of the ionic size, as well as solvent viscosity, permittivity, structure and basicity.