Thermodynamic studies of (RbF + RbCl + H2O) and (CsF + CsCl + H2O) ternary systems from potentiometric measurements at T = 298.2 K

• Thermodynamic properties of RbF + RbCl + H2O and CsF + CsCl + H2O ternary systems were determined.
• The Pitzer model and the Harned rule were used to correlate the experimental data.
• The mean activity coefficients, osmotic coefficients, and the excess Gibbs free energy were also obtained.

Thermodynamic properties of (RbF + RbCl + H2O) and (CsF + CsCl + H2O) systems were determined by the potentiometric method for different ionic strength fractions yB of RbCl/CsCl at 298.2 K. The Pitzer model and the Harned rule were used to fit the experimental values. The Pitzer mixing parameters and the Harned coefficients were evaluated. In addition, the mean ionic activity coefficients of RbF/CsF and RbCl/CsCl, the osmotic coefficients, and the excess Gibbs energies of the systems studied were calculated.

Thermodynamic properties, such as mean activity coefficients, osmotic coefficients and excess Gibbs free energies, of the RbF + RbCl + H2O and CsF + CsCl + H2O ternary systems were determined from potentiometric measurement at 298.2 K. The Pitzer model and the Harned rule were used to fit the experimental data.Figure optionsDownload high-quality image (135 K)Download as PowerPoint slide