Explain what is observed, when an electrolyte (say NaCl) is added to f – InterviewSolution

1.	Explain what is observed, when an electrolyte (say NaCl) is added to ferric hydroxide sol.
Answer» SOLUTION :On ADDING SODIUM chloride to ferric hydroxide sol, coagulation takes PLACE and a precipitate 8 of ferric hydroxide is obtained. This is due to the reason that the positive charge of the colloidal solution is neutralised by the ADSORPTION of negatively charged chloride ions. Therefore, coagulation takes place.

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