Chemistry - Electrochemistry Question with Solution | TestHub

A salt bridge is a U-shaped tube containing an inert electrolyte like $KCl$, $KN{O}_3$, or $N{H}_{4}N{O}_3$ in agar-agar or gelatin.

Its primary functions in an electrochemical cell are to complete the inner electrical circuit by allowing the movement of ions and to maintain the electrical neutrality of the electrolytes in the two half-cells.

As oxidation occurs at the anode, positive ions accumulate in the anodic half-cell. Similarly, as reduction occurs at the cathode, negative ions accumulate in the cathodic half-cell. The salt bridge provides anions to the anodic compartment and cations to the cathodic compartment to neutralize this charge buildup.

Answer: Maintain electrical neutrality in half-cells