Abstract
In this paper, the results relating to the thermodynamic properties of (KCl+proline+water) system using the potentiometric method are reported. The electromotive force (emf) measurements were performed on the galvanic cell of the type: Ag|AgCl|KCl (m), proline (w%), H2O (1−w)%|K-ISE, in various mixed solvent systems containing 0, 2.5, 5.0, 7.5, 10.0 and 12.5% mass fraction of proline over ionic strength ranging from 0.0010 to 3.9578mol.kg−1 at T=(298.2 and 303.2)K. The modeling of this ternary system was made based on the Pitzer ion-interaction model. The resulting values of the mean activity coefficients, the osmotic coefficients and the excess Gibbs free energy together with Pitzer ion-interaction parameters (β(0), β(1) and Cφ) for the series under investigated system are reported.
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