Thermodynamics of Some Potassium Salts in Methanol and Water Mixture at 30° to 40° C: A Theoretical Approach

In the present study, the conductivities of five potassium salts in methanol + water have been determined and compared with the data of ethanol + water [1] and dioxane + water [2] mixtures between 30 and 40 C. The ionsolvent interactions of five potassium salts in methanol + water, as well as conductance data from ethanol + water and dioxane + water, were compared at 10, 20, and 30% (w/w) solvent composition throughout the temperature range 30400. The K (dissociation constant) G8 1(el) (change in free energy transfer due to electrical contribution) and G8 1(el) (change in free energy transfer due to electrical contribution) G8 (oh) (change in free energy transfer due to electrical contribution) have been calculated and ion-solvent interactions are inferred. Dioxane is more basic and less acidic than that of pure water, because of electron releasing tendency of the methylene group in the molecule. A waster molecule which is hydrogen bonded with oxygen atom of a dioxane molecule also becomes more basic and less acidic than that of pure water.