A colloid is formed by adding `FeCl_(3)` in excess of hot water. What will happen if excess sodium chloride is added to this colloid?

Explanation

Positively charged ions coagulate the negatively charged sol and negatively charged ion coagulate the positively charged sol. Positively charged sol of hydrated ferric oxide is formed when `FeCl_(3)` is added in excess of hot water. On adding excess of NaCl to this sol, negatively charged `Cl^(-)` ions coagulate the positively charged sol of hydrated ferric oxide.