Application of the new perturbation method to predict densities of single electrolyte aqueous solutions

A new perturbation method for electrolyte solutions is given in our recent paper (Wu, J.Z., Lu, J.F. and Li, Y.G., 1994. Fluid Phase Equilibria). Here we apply this model to pure water and real electrolyte solutions. Equations of state for water and electrolyte solutions are further developed. The parameters of water are obtained by fitting the saturated vapor pressure and liquid density experimental data simultaneously over a wide range of temperature. With these parameters of water and Pauling radii of ions, the densities of single electrolyte aqueous solutions can be predicted for the concentration range up to saturation at temperature of 25°C without any adjustable parameters.