Surface Chemistry

Short Answer Type

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What is the coagulating power of an electrolyte? What is the cause of coagulation?

Answer:

Coagulating power of an electrolyte is the minimum amount of electrolyte in millimoles that must be added to one litre of a colloidal solution to bring about its coagulation.

Coagulation is caused by
(i) Electrophoresis,
(ii) Mutual precipitation by mixing oppositely charged sols in proper proportion.
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