Thermodynamic and transport properties of aqueous trisodium citrate system at 298.15 K

In this work, we report density, viscosity, refractive index and water activity data for the aqueous trisodium citrate (C6H5Na3O7) system at 298.15 K. The parameters of the Pitzer ion-interaction model are evaluated from isopiestic water activity data. The apparent molar volume at infinite dilution was calculated from density data and a new value for the conventional partial molar volume of citrate ion (Cit3−) was derived. The experimental viscosity data have been fitted to the Kumar equation. Using this equation, the hydration number (h) and ion-solvent interaction parameter (B) for trisodium citrate were obtained.