Viscosities and Densities of Some Multicharged Electrolytes in Water-Tert Butyl Alcohol

Abstract

Viscosity and density data for aluminium ammonium sulphate and potassium aluminium sulphate in tert-butyl alcohol-water (tert. BuOH–H₂O) solutions [5, 10, 15 and 20 wt%] at different concentrations and temperatures are presented. The viscosity data have been analysed by means of Jones-Dole equation. The activation parameters of viscous flow were obtained by means of the application of transition state theory in order to estimate the mechanism of the viscous flow. The density data have been analysed by using the Masson’s equation. The limiting apparent molar volume φ_v⁰, and the experimental slope S_v, have been interpreted in terms of solute-solvent and solute-solute interactions, respectively. The φ_v⁰ values vary with temperature as a power series of temperature. Structure making/breaking capacities of the multicharged electrolytes have also been inferred from the sign of (∂²φ_v⁰⁄∂T²). Both the electrolytes behave as structure makers/promotors.