The solubility of MgSO4*7H2O in the H2SO4 H2O and Ti(SO4)2 H2SO4 H2O systems was investigated from (278.2 to 308.2) K with initial H2SO4 concentrations of (0 to 5.5) mol*kg 1 by dynamic method. It was found that the solubility of MgSO4*7H2O in the H2SO4 H2O system gradually decreased and then slightly increased with the concentration of H2SO4. Each solubility curve has its own minimum which is temperature dependent. For the MgSO4 Ti(SO4)2 H2SO4 H2O system, the solubility of MgSO4*7H2O decreased sharply with increasing concentrations of H2SO4 and Ti(SO4)2 throughout the entire range investigated. A new chemical model was developed by regression of the experimental data for MgSO4*7H2O solubility to obtain new middle range interaction parameters for the mixed-solvent electrolyte (MSE) model. The model, with the newly obtained parameters, was applied to predict the speciation, water activity, and ionic activity coefficients in the MgSO4 H2SO4 H2O and MgSO4 Ti(SO4)2 H2SO4 H2O systems.
Compounds
#
Formula
Name
1
MgO4S
magnesium sulfate
2
H2O4S
sulfuric acid
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.