where M water and M CnAm are respectively the molar mass of water and electrolyte and x water and x CnAm are the mass fraction of water and electrolyte in solution. In Figures and, we plot v CnAm water (P ) for monovalent (LiCl, NaCl, KCl) and divalent (MgCl 2 , CaCl 2 ) electrolytes up to molalities of 5 mol/kg as well as partial molar volume of pure water extracted from NIST data. It is clear from experiment that the partial molar volume of water in electrolyte solutions is the same as the partial molar volume of pure water, irrespective of concentration and valency of electrolyte, which is in agreement with Figure .