Chapter 21, Problem 8RAT

What is the purpose of the salt bridge in Figure 21.17?

(a) To prevent any further migration of electrons through the wire.

(b) To allow for the build-up of positively charged ions in one container and negatively charged ions in the other container.

(c) To allow the ${\text{Fe}}^{2+}$ and the ${\text{Cu}}^{2+}$ to flow freely between the two containers.

(d) To allow for a balance of charge between the two chambers.

To determine

The correct option for the statement “What is the purpose of the salt bridge in Figure 21.17?”

Answer to Problem 8RAT

The correct option for the statement “What is the purpose of the salt bridge in Figure 21.17?” is option (d).

Explanation of Solution

The salt bridge completes the circuit. The ions from the salt bridge flow to the containers to balance the ions.

It prevents the build-up of the positive charge and just helps in balancing the charges of both chambers.

So, the correct option is (d).

Conclusion:

Therefore, the correct option for the statement “What is the purpose of the salt bridge in Figure 21.17?” is option (d).