A colloid is formed by adding FeCl_3 in excess of hot water. What will – InterviewSolution

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1.	A colloid is formed by adding FeCl_3 in excess of hot water. What will happen if excess sodium chloride is added to this colloride ?
Answer» Solution :A positively CHARGED colloidal solution of hydrated ferric oxide is FORMED. On ADDING sodium chloride, NEGATIVELY charged chloride ions neutralise the positive charge of the colloidal solution. Coagulation of the sol takes place.

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