Relation between Charge and Stability of Colloidal Gold

IT is believed by most colloid chemists that the stability of a colloid depends on the charge on its particles, and that the greater the charge the greater the stability. The results of coagulation of colloids by electrolytes, as well as the effect of dialysis on the stability of the colloid, have been explained on the basis of the above idea. Mukherjee and collaborators, 1 however, working on arsenious sulphide sol, found that the stability of this sol is not so directly related to the charge as it is generally believed to be.