Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The densities and viscosities of some thiocyanate compounds, viz., ammonium thiocyanate, sodium thiocyanate, and potassium thiocyanate, in 10 %, 20 %, and 30 % by mass of 1,3-dioxolane + water mixtures have been determined at T ) (298.15, 308.15, and 318.15) K and p ) 0.1 MPa. The speeds of sound of the thiocyanate compounds in 10 %, 20 %, and 30 % by mass of 1,3-dioxolane + water mixtures have also been determined at 298.15 K. Apparent molar volumes (Vo), viscosity B-coefficients, and adiabatic compressibility ( ) of these electrolytes were obtained from their densities, viscosities, and speed of sound data. The limiting apparent molar volumes (Vo o) and experimental slopes (Sv*) derived from the Masson equation and the obtained parameters have been interpreted in terms of ion-solvent and ion-ion interactions, respectively. The viscosity data were evaluated by using the Jones-Dole equation. The structure making/ breaking capacities of the electrolytes have been inferred from the sign of (a2oV o/aT2)p and dB/dT. The activation parameters of viscous flow for the ternary solutions studied were also calculated and explained by the application of transition state theory.