Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

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

Ma, Xu-Chun, Li, Xiao-Ping, He, Xiao-Feng, Sang, Shi-Hua, Lei, Ning-Fei, Nie, Zhen
J. Chem. Eng. Data 2019, 64, 1, 90-97
ABSTRACT
In this work, we investigated some thermodynamic properties of the NaClCuCl2-H2O ternary system. We designed a cell without liquid junction as follows: Na-ISE | NaCl (m1), CuCl2 (m2) | Cl-ISE, which was used to study the mean activity coefficients of NaCl in the NaCl-CuCl2-H2O system at 298.15 K by the electromotive force method. In this system, the total ionic strength I ranging from 0.01 mol*kg-1 up to 1.00 mol*kg-1 for different ionic strength fractions yb of CuCl2, i.e., yb = (0.0, 0.2, 0.4, 0.6, 0.8). The results show that the Na-ISE and Cl-ISE have good Nernst effect. The mean activity coefficients of NaCl in the ternary system were calculated using Nernst equation. The Pitzer ion interaction parameters Na, Cu and Na, Cu, Cl were fitted with experimental results in this work. In addition, the osmotic coefficient, the solvent activity and the excess Gibbs free energy of the ternary system were also calculated.
Compounds
# Formula Name
1 ClNa sodium chloride
2 Cl2Cu copper chloride
3 H2O water
Datasets
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
  • 1
  • 2
  • 3
  • Mean ionic activity coefficient - 1 ; Liquid
  • Molality, mol/kg - 1; Liquid
  • Molality, mol/kg - 2; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Calculated from EMF cell potential
  • 60
  • POMD
  • 1
  • 3
  • Mean ionic activity coefficient - 1 ; Liquid
  • Molality, mol/kg - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Calculated from EMF cell potential
  • 12