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

Activity of Water in Aqueous Solutions of Sodium Citrate and in Aqueous Solutions of (An Inorganic Salt and Citric Acid) at 298.15 K

Schunk, A.[Andreas], Maurer, G.[Gerd]
J. Chem. Eng. Data 2004, 49, 4, 944-949
ABSTRACT
Modeling the reactive extraction of carboxylic acids in the presence of inorganic salts requires experimental data for the thermodynamic properties of aqueous solutions of the single salts as well as of aqueous solutions of (salt + carboxylic acid) mixtures. The activity of water in such solutions was determined by isopiestic measurements at 298.15 K for the binary mixture (water + sodium citrate) and the ternary mixtures of (water + citric acid + salt) for the salts sodium chloride, sodium nitrate, sodium sulfate, and sodium citrate. The experimental data are correlated with Pitzer?s Gibbs excess energy model for aqueous electrolyte solutions.
Compounds
# Formula Name
1 C6H10O8 2-hydroxy-1,2,3-propanetricarboxylic acid monohydrate
2 NNaO3 sodium nitrate
3 ClNa sodium chloride
4 Na2O4S sodium sulfate
5 C6H5Na3O7 trisodium citrate
6 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
  • 5
  • 6
  • (Relative) activity - 6 ; Liquid
  • Molality, mol/kg - 5; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • OTHER
  • 11
  • POMD
  • 1
  • 3
  • 6
  • (Relative) activity - 6 ; Liquid
  • Molality, mol/kg - 3; Liquid
  • Molality, mol/kg - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • OTHER
  • 37
  • POMD
  • 1
  • 2
  • 6
  • (Relative) activity - 6 ; Liquid
  • Molality, mol/kg - 2; Liquid
  • Molality, mol/kg - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • OTHER
  • 35
  • POMD
  • 5
  • 1
  • 6
  • (Relative) activity - 6 ; Liquid
  • Molality, mol/kg - 5; Liquid
  • Molality, mol/kg - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • OTHER
  • 106
  • POMD
  • 1
  • 6
  • 4
  • (Relative) activity - 6 ; Liquid
  • Molality, mol/kg - 4; Liquid
  • Molality, mol/kg - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • OTHER
  • 33