A standard galvanic cell is constructed with Co^2+ | Co and Pb^2+ | Pb half cell

Question

A standard galvanic cell is constructed with Co^2+ | Co and Pb^2+ | Pb half cell compartments connected by a salt bridge. Which of the following statements are correct? (Choose all that apply.) The anode compartment is the Pb^2+|Pb compartment. The anode compartment is the Co^2+|Co compartment. Pb^2+ is reduced at the cathode. As the cell runs, anions will migrate from the Pb^2+|Pb compartment to the Co^2+|Co compartment. In the external circuit, electrons flow from the Pb^2+|Pb compartment to the Co^2+|Co compartment.

Explanation / Answer

According to Standard Reduction potential table,

Co ----> Co2+ + 2e-  Eoxd = 0.28V

Pb2+ +2e- -----> Pb Ered = -0.126V

So, anode compartment is Co2+/Co because in a cell oxidation occurs at anode.

Pb2+ is reduced at the cathode.

Ans: B,C

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