Viscometric and conductometric studies for CaCl2 solutions in water–propan-1-ol mixtures at 25 °C

Abstract

Viscosity, density and conductivity measurements for CaCl₂ solutions in the water–propan-1-ol system containing up to 70 mol% of alcohol at 25 °C have been performed. The modified Jones–Dole equation was used for the analysis of viscosity data of the associated electrolyte. From the limiting ionic conductivity data, measured by us previously, the A coefficients in these systems were calculated. Conductivity results were analysed by the Fuoss–Edelson method. The limiting conductivity values of CaCl₂ are given.

Based on the analysis of conductivity results, it has been found that there is practically no ionic association in CaCl₂ solutions containing up to 10 mol% of propan-1-ol. Ionic association was taken into account in solutions containing > 10 mol% of propanol and the values of B coefficients were calculated: B₁=B_CaCl⁺+B_Cl^– and B₂=B_Ca²⁺+ 2B_Cl^–. The calculated values of the B₂ coefficients of the modified Jones–Dole equation are considerably higher than those of the uncorrected B coefficients.