Ion-solvent and ion-ion interactions of sodium molybdate and sodium tungstate in mixtures of acetonitrile and water at 298.15, 308.15, and 318.15 K

The apparent molar volumes (V _ϕ) and viscosity B-coefficients of sodium molybdate and sodium tungstate in aqueous binary mixtures of acetonitrile were determined from solution density and viscosity measurements at 298.15, 308.15 and 318.15 K and various electrolyte concentrations. The experimental density and viscosity data were evaluated by the Masson and Jones-Dole equations, respectively, and the parameters derived were interpreted in terms of ion-solvent and ion-ion interactions. The activation parameters of viscous flow were also determined and discussed using transition state theory. The article is published in the original.