Title: Thermodynamic Study of the Ternary System KCl–CuCl<sub>2</sub>–H<sub>2</sub>O at 298.15 K by the Electromotive Force Method
Abstract: The mean activity coefficients of KCl in the ternary system KCl–CuCl2–H2O were experimentally determined at a temperature of 298.15 K by the EMF method (electromotive force measurement) via a battery cell without a liquid junction, K-ISE|KCl (m1), CuCl2 (m2) |Cl-ISE (ISE = ion selective electrode), in the range of total ionic strength from 0.01 to 1.00 mol·kg−1 at different ionic strength fractions of CuCl2 with yb = 0.20, 0.40, 0.60, and 0.80. The results show that K-ISE and Cl-ISE have a good Nernst response in this work, and the mean activity coefficients of KCl in the KCl–CuCl2–H2O mixture solutions were calculated using the Nernst equation. Mixing interaction parameters θK,Cu and ψK,Cu,Cl in Pitzer's equation were evaluated from the present measurements of the mean activity coefficients of KCl. In addition, the osmotic coefficients, water activity, and the excess Gibbs energy of this system were calculated by Pitzer's equations.
Publication Year: 2019
Publication Date: 2019-10-03
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 5
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