Viscosities of concentrated solutions of sodium and potassium acetates in aqueous solutions of d-glucose

Abstract

The relative viscosities (η r) of concentrated solutions of sodium and potassium acetates in 0.5 m d-glucose solution at 25, 30, 35, and 40° are reported. Viscosity data have been analyzed using Vand's, Thomas's, Bresslau and Miller's, Moulik's, and a generalized treatment, at higher electrolytic concentrations. The molar volumes ( V̄), ionic B-coefficients (B ±), and hydration numbers (n B) of ions were computed, and structural aspects of sodium and potassium acetates in aqueous d-glucose solutions have been interpreted by taking into account the magnitude of various parameters obtained. The temperature-dependence of B-coefficients has also been discussed. In aqueous d-glucose solutions, Na + and K + are found to act as net structure-breakers, whereas a significant structure-making trend is shown by acetate ion.