Ion−Solvent Interactions of Some Alkali Halides in Glycerol from Density and Viscosity Data

Abstract

This paper presents the results of density and viscosity measurements for glycerol solutions of KCl, NaCl, KBr, and KI at 25 °C. The apparent and partial molar volumes (VΦ and V1) were calculated from the density data. The Debye−Huckel limiting law was assumed to be valid at low concentrations, and values of the molar volumes at infinite dilution were obtained by extrapolation. The viscosity data were analyzed by means of the Jones−Dole equation. The Kaminsky method, based on BK+ = BCl-, developed for the separation of the B-coefficients in aqueous solutions was used in glycerol. The ionic B-coefficients are discussed in terms of structure-making and structure-breaking properties of ions in glycerol. A comparison of molar volume data with viscosity data in glycerol shows that, as in aqueous solutions, the salt (NaCl) having the highest B-coefficient exhibits the smallest limiting apparent molar volume . Finally, the similarities of ion−solvent interactions in pure water with those in glycerol and the effe...