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 mol·kg-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 ±1.7 μmolμkg-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.
ASJC Scopus subject areas
- Chemical Engineering(all)