AbstractThe equations which have been derivedJ. P. W. A. van Braam Houckgeest, Thesis, Leiden 1939.J. P. W. A. van Braam Houckgeest, Rec. trav. chim.59, 560 (1940).for the dissociation equilibrium and the solubility of an electrolyte contain a series of energy quantities, the values of which must be known in order to enable comparison between theory and experiment. In this article the evaluation of these energy terms is given.