THERMODYNAMIC BEHAVIOR OF SOME ELECTROLYTES IN ETHANE-1,2-DIOL FROM-10 TO +80-DEGREES-C

Conductivities of the electrolytes NaBr, NaPi, HPi, NaBPh4, and Ph4PBr in ethane- 1, 2-diol were determined in the - 10 less-than-or-equal-to t less-than-or-equal-to + 80-degrees-C temperature range. The experimental data were analyzed by the Fuoss-Hsia equation, which provides further informative parameters such as the dissociation constant (K) of the ion pairs formed in solution, the limiting equivalent conductivity (LAMBDA0), and the ion-size parameter (a). Thermodynamic behaviour of these electrolytes was derived from analysis of the K values. Single-ion conductivities were evaluated on the basis of the assumption of Ph4PBPh4 as reference electrolyte.