Question

Explain the observation likely to be made when an electric current are allowed to pass through a colloidal solution.

Answer 1

When an electric current is passed through a colloidal solution, the colloidal particles, which carry a particular type of electrical charge, move towards the electrode of opposite charge. This movement of colloidal particles under the electric field is called electrophoresis. Positively charged particles move towards the cathode, while negatively charged particles move towards the anode. This observation confirms that colloidal particles carry an electric charge.