For two-phase liquid systems with two components, the following expression was found valid :where for liquids A and B respectively, SA and SB are the mutual solubilities expressed in volume of solute per volume of solvent and p, E, X, V, are the dipole moment, dielectric constant, specific magnetic susceptibility and molar volume, respectively.Within the precision of the experimental data available at present, this empirical expression is valid at the critical solution temperature (c.s.t.) of both phases.Below the c.s.t., marked disagreements are found, but even so, for 100 pairs of liquids at 20" C, a statistical study showed that solubilities can be predicted with a probable
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