Based entirely on modern surface chemistry principles, which of the following intense physical or chemical procedures will inevitably and effectively lead to the heavy coagulation or flocculation of a

Question

Based entirely on modern surface chemistry principles, which of the following intense physical or chemical procedures will inevitably and effectively lead to the heavy coagulation or flocculation of a previously stable lyophobic colloidal sol?

Prashant Kotian · Accepted Answer

Correct answer: A,B,C. A is strictly true: highly prolonged dialysis removes virtually all essential traces of the tiny amount of stabilizing electrolyte required for double-layer stability, causing precipitation. B is true: mutual coagulation inevitably occurs when oppositely charged sols rigidly neutralize each other. C is true: during prolonged electrophoresis, charged particles migrate entirely to the oppositely charged electrodes, heavily discharge, and immediately coagulate. D is generally false; adding an immiscible non-polar solvent may strictly cause a massive phase separation but not true coagulation of the aqueous dispersed phase.

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