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

Abstract

Conductance measurements have been carried out on the mixed 2-methyoxyethanol (component 1)–water (component 2) solvent system for NaBPh₄ solutions at 19 temperatures ranging from –10 to +80 °C, and for six binary solvent mixtures covering the 0.1865 ⩽x₁⩽ 1 mole fraction range. The experimental data were processed by the more general Fuoss-Hsia equation, which provides the limiting molar conductance (Λ₀). 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), Λ₀=A₀(T/T_s– 1)^γ, with a singular temperature T_s for each binary mixture, where A₀ and γ 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.