Ionic Interactions of Calcium Sulfate Dihydrate in Aqueous Calcium Chloride Solutions: Solubilities, Densities, Viscosities, and Electrical Conductivities at 30°C

Abstract

Different physicochemical properties such as solubilities, densities, viscosities, and electrical conductivities of calcium sulfate dihydrate in aqueous calcium chloride solutions have been measured at 30°C to examine the ionic interactions in the system. Density values have been used to calculate the mean apparent molar volumes of ternary mixtures. Viscosity values have been analyzed using different empirical equations and the experimental values of viscosity were combined with conductivity values to get the Walden product. The experimental data have been fitted by a polynomial equation for least-squares analysis to obtain the coefficients and the standard errors. Results have been examined in the light of the “structure making” or “structure breaking” effect of the various ions present in the solution.