In this paper, the potentiometric method was carried out to investigate the thermodynamic properties of the RbF + Rb2SO4 + H2O and CsF + Cs2SO4 + H2O ternary systems over total ionic strengths from (0.01 to 0.70) mol*kg-1 for different ionic strength fractions yB of Rb2SO4/Cs2SO4 with yB = 0.00, 0.30, 0.60 and 0.90, at 298.2 K. The Harned rule and the Pitzer model were used to correlate the experimental data. The Harned coefficients and the Pitzer mixing parameters were evaluated by multiple linear regression technique. Moreover, the mean ionic activity coefficients of RbF/CsF and Rb2SO4/Cs2SO4, the osmotic coefficients, and the excess Gibbs energies of the studied systems were calculated, respectively.
Compounds
#
Formula
Name
1
FRb
rubidium fluoride (RbF)
2
O4Rb2S
rubidium sulfate
3
CsF
cesium fluoride (CsF)
4
Cs2O4S
cesium sulfate
5
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.