Question

What is the purpose of a salt bridge in an electrochemical cell?A. It provides a second pathway for the electrons to flow so that the wire does not overheat.B. It allows ions to flow from the cathode to the anode in order to prevent a buildup of negative charges.C. It allows ions to flow to the cathode and anode in order to prevent a buildup of positive or negative charges.D. It provides a reverse pathway for charges to flow so they can be recycled and continuously used.

Answer 1

Explanation:

The salt bridge (in most cases: KCl) helps maintain the electrical neutrality within the internal circuit of an electromechanical cell.

The bridge also helps in preventing the cell from taking its reaction to equilibrium.

Answer: C. It allows ions to flow to the cathode and anode in order to prevent a buildup of positive or negative charges.