Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

Electrolytic conductivities of some alkali metal halides, MX (M+ = Li+, Na+, and K+; X = Cl , Br , and I ), NaBPh4 and Bu4NBr have been investigated in (20, 40, and 60) mass% {dimethyl sulfoxide (DMSO) in DMSO + acetonitrile} at T = 298.15 K. The conductance results have been analyzed by the Fuoss-conductance- concentration equation in terms of the limiting molar conductance K the association constant KA and the association diameter R. The ionic contributions to the limiting molar conductance have been estimated using Bu4NBPh4 as the reference electrolyte . The association constant KA tends to increase in the order mass percent 20 less than 40 less than 60 DMSO in (DMSO + acetonitrile) which is explained by the thermodynamic parameter DG and Walden product K g. The results have been interpreted in terms of ion solvent interactions and structural changes in the mixed solvents.