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

Mean Activity Coefficients of NaCl in the NaCl + SrCl2 + H2O Ternary System at 278.15 K by the Cell Potential Method

Ge, Q.[Qi], Liu, X.[Xing], Sang, S.-H.[Shi-Hua], Wu, Z.-Z.[Zhong-Zhong]
J. Chem. Eng. Data 2019, 64, 12, 5282-5287
ABSTRACT
In this paper, the research of thermodynamic mean activity coefficients about the ternary system (NaCl-SrCl2-H2O) have been made. A cell without liquid junction can be expressed as Sodium ISE Sodium Chlorine (mA), Strontium Chloride (mB)ChlorineISE.It is used to research the activity coefficients in this mixtures at 278.15 K by EMF method. Then (total ionic strengths) I=0.0100-3.0000 mol*kg-1 and different yB (ionic strength fractions) = (0.0, 0.2, 0.4, 0.6, and 0.8). The diagrams between NaCl ( mean activity coefficient of NaCl) and yB (ionic strength fraction) were plotted. The mixed interaction parameters of Pitzer equations Na, Sr and Na, Sr, Cl of this system at 278.15 K were fitted by using multiple regression, respectively. In addition, those obtained parameters were also used to calculate SrCl2 (mean activity coefficients of SrCl2) by the Pitzer equation. Accordingly, osmotic coefficients, water activity and excess Gibbs free energy in mixtures were studied.
Compounds
# Formula Name
1 ClNa sodium chloride
2 Cl2Sr strontium 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
  • cell potential measurements
  • 40
  • POMD
  • 1
  • 3
  • Mean ionic activity coefficient - 1 ; Liquid
  • Molality, mol/kg - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • cell potential measurements
  • 8