THERMODYNAMICS OF THE AQUEOUS SODIUM AND MAGNESIUM BROMIDE SYSTEM AT THE TEMPERATURES 273.15 K AND 298.15 K

A thermodynamic approach based on the Pitzer model has been used for p lotting the theoretical solubility isotherms of the NaBr-MgBr2-H2O sys tem at the temperatures T=273.15 K and T=298.15 K. The thermodynamic f unctions (osmotic coefficients, binary parameters of interionic intera ction and thermodynamic solubility products) needed for simulation at T = 273.15 K of the corresponding binary solutions have been calculate d using empirical approximating equations which express the dependence of osmotic coefficients and binary parameters on temperature. The ter nary Pitzer parameters are calculated using experimental data on the s olubility of the saturated ternary solution. Good agreement between ex perimental and calculated solubilities has been found.