Abstract
Electrical conductance data at 25°C for K2SO4, Na2SO4, and MgCl2 solutions are reported at concentrations up to 0.01 eq-liter−1 and as a function of pressure up to 2000 atm. The molal dissociation constants are as follows:
withP in atmospheres. These values cannot be chosen solely on the basis of minimizing errors in fitting conductance data to theoretical equations. For the values cited above, the Bjerrum distances for 1–2 (or 2-1) and 1-1 salts were used. However, the conductance fits for KSO −4 and NaSO −4 were equally good for half-Bjerrum distances and resulted in higher dissociation constants. Ultrasonic data are used to argue in favor of the lower dissociation values derived by using Bjerrum distances. Our results for MgCl+ disagree with those of Havel and Högfeldt.
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Contribution of the Scripps Institute of Oceanography, new series.
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Fisher, F.H., Fox, A.P. KSO −4 , NaSO −4 , and MgCl+ ion pairs in aqueous solutions up to 2000 atm. J Solution Chem 6, 641–650 (1977). https://doi.org/10.1007/BF00645881
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DOI: https://doi.org/10.1007/BF00645881