The solubility of oxygen in equilibrium with air has been measured in aqueous solutions of KCl, K2SO4, and CaCl2 from 5 to 45 C with molalities from 0.1 mol7kg-1 to saturation. The solubilities have been fitted to a Setschenow type equation. The adjustable parameters of the Setschenow equation were determined by a least-squares fit of the data over the temperature range measured. The standard errors of the fits of the molality of O2 are less than 11.7 mol7kg-1 for all the salts. The limiting values of the salting coefficient, kS, for the solutions have been determined from the fits. The results were also examined using the Pitzer equation. The coefficients determined for K+, Ca2+, Cl-, and SO42- are in reasonable agreement with the tabulations of Clegg and Brimblecombe.
Compounds
#
Formula
Name
1
O2
oxygen
2
ClK
potassium chloride
3
K2O4S
potassium sulfate
4
CaCl2
calcium chloride
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.