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

Mean Activity Coefficients of NaCl in NaCl CdCl2 H2O Ternary System at 298.15 K by Potential Difference Method

Wang, D.[Dan], Yang, Y.-Y.[Yu-Yan], Zhang, X.-P.[Xue-Ping], Sang, S.-H.[Shi-Hua]
J. Chem. Eng. Data 2016, 61, 9, 3027-3033
ABSTRACT
In this work, in ternary mixed-electrolyte system (NaCl CdCl2 H2O), the mean activity coefficients of NaCl were measured with the potential difference method of the cell: Na ion-selective electroed (ISE)|NaCl(m1), CdCl2(m2)|Cl ion-selective electroed (ISE) at 298.15 K. Also, we chose the total ionic strength I range from 0.0100 to 1.0000 mol*kg 1 for different ionic strength fractions yb of CdCl2 with yb = (0.8, 0.6, 0.4, 0.2, 0). The experimental results gave that the mean activity coefficients of NaCl can be interpreted well by the Pitzer models, Na-ISE and Cl-ISE had a good Nernst response. Furthermore, the mixing Pitzer ion interaction parameters of Na,Cd and Na,Cd,Cl were fitted from Pitzer s equation, and the two parameters were applied to compute the values of the mean activity coefficients of CdCl2.
Compounds
# Formula Name
1 ClNa sodium chloride
2 H2O water
3 CdCl2 cadmium chloride
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 - 3; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Calculated from EMF cell potential
  • 60
  • POMD
  • 1
  • 2
  • Mean ionic activity coefficient - 1 ; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Calculated from EMF cell potential
  • 12