A standard galvanic cell is constructed in which a Cu2+ | Cu half cell acts as t

Question

A standard galvanic cell is constructed in which a Cu2+ | Cu half cell acts as the cathode. Which of the following statements are correct? Hint: Refer to a table of standard reduction potentials. (Choose all that apply.)

a. In the external circuit, electrons flow from the other compartment to the Cu2+|Cu compartment.

b. Cu2+ is reduced at the cathode.

c. The cathode reaction is Cu -> Cu2+ + 2e-.

d. The anode compartment could be Ag+|Ag.

e. As the cell runs, anions will migrate from the other compartment to the Cu2+|Cu compartment.

Explanation / Answer

if cathode, then it is getting reduced, i.e. gains electrons:

a.

true, since e- must be provided to Cu+2 to reduce inthe cathode

b.

true, since it is the function of the cahtode, to reduce

c.

false, it is reversed

d.

not likely, since Ag+ has higher potential, it will end up reducing Ag+

e.

anions = negative charge , therefore this is false, Cu+2 is being lost, so positive charge losses, we need cations, i.e. positive ions to counterbalance this

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