Conductances of sodium tetraphenylborate in 2-methoxyethanol - water binary solvent mixtures

Conductance measurements have been carried out on the mixed 2-methoxyethanol (component 1)-water (component 2) solvent system for NaBPh4 solutions at 19 temperatures ranging from - 10 to + 80-degrees-C, and for six binary solvent mixtures covering the 0.1865 less-than-or-equal-to x1 less-than-or-equal-to 1 mole fraction range. The experimental data were processed by the more general Fuoss-Hsia equation, which provides the limiting molar conductance (LAMBDA0). This quantity is well fitted to the function proposed by Speedy and Angell (R. J. Speedy and C. A. Angell, J. Chem. Phys., 1976, 65, 851), LAMBDA0 = LAMBDA0(T/T(s) - 1)gamma, with a singular temperature T(s) for each binary mixture, where A0 and gamma are constants. Furthermore, the activation energy for the limiting equivalent conductivity has been evaluated on the basis of an Arrhenius equation and discussed in terms of the structural solvent-cosolvent complex adduct formation.