The generalization that the critical
coagulation concentration for a typical
lyophobic sol is extremely sensitive to the
valence of the
counter-ions (high
valence gives a low critical
coagulation concentration).
Source:
PAC, 1972, 31, 577
(Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix
II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry)
on page 610