The solubility of Na2MoO4.2H2O in (Na(+) + MoO4(2-) + SO4(2-)) system was carried out using a dynamic method within the temperature range from 293.15 K to 343.15 K. The new model was established via regression of the published and the determined values to predict the solubility. From the results, the solubility of sodium molybdate increases with the temperature increase, however, it decreases with the increasing concentration of sodium sulfate. The Pitzer parameters and the solubility product constant of sodium sulfate and sodium molybdate in aqueous solution were obtained using the literature data. The solubilities of the sodium molybdate in the sodium sulfate solution as well as the thermodynamic parameters were calculated based on the experimental values obtained. The new model was also applied to estimate the solubility of the sodium molybdate under various conditions. The calculated values agree well with the experiment results.
Compounds
#
Formula
Name
1
Na2O4S
sodium sulfate
2
MoNa2O4
sodium molybdate
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
2
3
1
Molality, mol/kg - 2 ; Liquid
Temperature, K; Liquid
Molality, mol/kg - 1; Liquid
Pressure, kPa; Liquid
Liquid
Crystal of intercomponent compound 1
plasma-optical emission spectrometry and ion chromotography
65
POMD
2
3
Molality, mol/kg - 2 ; Liquid
Temperature, K; Liquid
Pressure, kPa; Liquid
Liquid
Crystal of intercomponent compound 1
plasma-optical emission spectrometry and ion chromotography