The solubility of sodium tungstate dihydrate and sodium molybdate dihydrate in the (Na2MoO4 + Na2WO4 + Na2SO4 + H2O) system was studied using experimental and calculated methods. The osmotic coefficient of sodium tungstate was fitted to calculate the thermodynamics parameters of (Na2WO4 + H2O) system. The solubility of sodium tungstate dihydrate was determined using the dynamic method in Na2WO4 Na2SO4 H2O to establish the new model which can provide an estimate the solubility of sodium tungstate dihydrate in various conditions, combined with the data published, the solubility of sodium tungstate dihydrate and the sodium molybdate dihydrate in quaternary system of (Na2MoO4 + Na2WO4 + Na2SO4 + H2O) was estimated using the parameters of the two ternary systems of (Na2WO4 + Na2SO4 + H2O) and (Na2MoO4 + Na2SO4 + H2O). The results show that the AARD is always small and the calculated value is basically consistent with the experimental values for the system studied.
Compounds
#
Formula
Name
1
Na2O4W
sodium tungstate
2
Na2O4S
sodium sulfate
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.