Solution Properties of Tetraalkylammonium Halide and Alkali-Metal Halide Ion Pairs. The Relationship Between Dissociation Constants and Solubility Products

Abstract

An empirical relation describing the effect of solvent on the dissociation constant ( K_d ) of ion pairs is described. An equation of the form pK_d = apK_so + bD^-1 + c ( K_so and D stand for the solubility product of a given salt and for the electric permittivity of a solvent, respectively) has been tested with 13 sets of experimental data for salts containing tetraalkylammonium and alkali-metal cations. A successful correlation was obtained in 100% of the cases considered.