Density and viscosity of the system Ca(NO3)2-H2O-dimethyl sulphoxide

Abstract

The density and viscosity of the ternary system Ca(NO3)2-H2O-dimethyl sulphoxide were measured over the temperature range 0 < t < 60 °C, with the mole fraction of the salt in the system varied in the range 0.05 < x < 0.16. The temperature and concentration dependences of density and viscosity have been described by empirical equations. The viscosity data show a pronounced dependence on the solvent composition. Maximum deviations of viscosity from the ideal additive behaviour of the two salt-solvent binary systems occur at a mole fraction of DMSO in the mixed solvent of 0.3. The observed dependence is discussed in relation to the structure of the solution.