Thermodynamics Research Center, ThermoML : Journal of Chemical and Engineering Data

Thermodynamic Study of the Ternary System KCl-CuCl2-H2O at 298.15 K by the Electromotive Force Method

Wei, X.-Q.[Xue-Qi], Sang, S.-H.[Shi-Hua], Ma, X.-C.[Xu-Chun], Gao, Y.-Y.[Yun-Yun], Lei, N.-F.[Ning-Fei]
J. Chem. Eng. Data 2019, 64, 12, 5349-5355
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*kg1 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 K,Cu and K,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.
# Formula Name
1 H2O water
2 ClK potassium chloride
3 Cl2Cu copper chloride
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 2
  • 3
  • 1
  • Mean ionic activity coefficient - 2 ; Liquid
  • Molality, mol/kg - 2; Liquid
  • Molality, mol/kg - 3; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • cell potential
  • 48