A standard galvanic cell is constructed with Cu 2+ | Cu + and Fe 3+ | Fe 2+ half

Question

A standard galvanic cell is constructed with Cu2+ | Cu+ and Fe3+ | Fe2+ half cell compartments connected by a salt bridge. Which of the following statements are correct?

Hint: Refer to a table of standard reduction potentials.

(Choose all that apply.)

A. The cathode compartment is the Fe3+|Fe2+ compartment.

B. The cathode compartment is the Cu2+|Cu+ compartment.

C. As the cell runs, anions will migrate from the Fe3+|Fe2+ compartment to the Cu2+|Cu+ compartment.

D. In the external circuit, electrons flow from the Fe3+|Fe2+ compartment to the Cu2+|Cu+ compartment.

E. Cu+ is oxidized at the anode.

Explanation / Answer

Fe3+ + e Fe2+ +0.77; Cu2+ + e Cu+ +0.159

clearly, Fe3+ is likely to reduce, since it has higher potential

a

cathode --> must be Fe+3/ Fe+2, since it has higher potential true

b.

false, cu+2/ Cu+ will be oxidized, therefore, it goes in the anode

c.

false, there is no migration, due to charge balance

d.

false, e- flow from Copper to Iron comparment, due to reduction requirements of e-

e.

True, Cu+ --> Cu+2 + e- in the anode

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