Summary.
A method is proposed that permits the proper extrapolation of thermodynamic quantities represented by the Pitzer equations from 25°C to other temperatures. The new method, which assumes temperature independent heat capacities, was tested for the NaCl*H2O system and found very satisfactory. A new evaluation of the Na2CO3*H2O system according to the CALPHAD method is presented, and solubilities for the quaternary Na2CO3*NaCl*NaOH*H2O and its ternary subsystems are predicted. Limitations of (i) these predictions and of (ii) the Pitzer model regarding extrapolations to high molalities are discussed.
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Received April 20, 2001. Accepted May 2, 2001
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Königsberger, E. Prediction of Electrolyte Solubilities from Minimal Thermodynamic Information. Monatshefte fuer Chemie 132, 1363–1386 (2001). https://doi.org/10.1007/s007060170022
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DOI: https://doi.org/10.1007/s007060170022