Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Water activities of sodium molybdate solutions at different temperatures

Jimenez, Yecid P., Coronas, Alberto, Hernandez-Luis, Felipe
Fluid Phase Equilib. 2018, 476, 131-138
ABSTRACT
The water activities of sodium molybdate in aqueous solutions at T = (303.15, 313.15, 323.15 and 333.15) K were determined, using vapor pressure osmometry. The range of salt concentration was from 0.06 to 2.2 mol kg-1. The results show that sodium molybdate has a significant effect on the water activity. Values of the vapor pressure, osmotic and activity coefficient of the solutions were determined from the activity data. Finally, the studied system was modeled with the Pitzer model which allowed correlating the properties of these aqueous solutions obtaining a good agreement between the experimental data and the correlated values.
Compounds
# Formula Name
1 MoNa2O4 sodium molybdate
2 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
  • (Relative) activity - 2 ; Liquid
  • Temperature, K; Liquid
  • Molality, mol/kg - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Osmometer
  • 56