Question

To prepare colloidal solution of hydrated iron oxide fe (oh)3 sol.

Answer 1

Ferric hydroxide forms a lyophobic sol. The substances such as metal hydroxides or sulphides which are insoluble and do not readily give colloidal solutions on treatment with water are called lyophobic colloids.

Ferric hydroxide sol is prepared by the hydrolysis of ferric chloride with boiling distilled water.