Question

what happen when a solution of NaCl is added to ferric hydroxide sol write whether fe(OH)3 sol a multimolecular or macromoleculer colloid​

Answer 1

(ii) An electrolyte, NaCl is added to hydrated ferric oxide sol. ... (ii) When NaCl is added to ferric oxide sol, it dissociates to give Na+ and Cl- ions. Particles of ferric oxide sol are positively charged. Thus, they get coagulated in the presence of negatively charged Cl- ions.