Note 287 — Chapter VII · PHYSICAL OR HETEROGENEOUS EQUILIBRIUM.—THE COLLOIDAL CONDITION
Reading edition
Freundlich found, for instance, that NaCl, KCl, BaCl2, in equivalent concentrations, had practically the same effect on colloidal ferric hydroxide, but only one-fortieth as much of a sulphate (the precipitating ion is SO42− versus Cl−) was required; Z. phys. Chem., 44, 129 (1903).