An electrochemical cell at 298 K is composed of two compartments, labeled C1 and

Question

An electrochemical cell at 298 K is composed of two compartments, labeled C1 and C2. C1 consists of a copper metal electrode immersed in a 0.30 M copper sulfate solution. C2 consists of a copper metal electrode immersed in a 1.5 M copper sulfate solution. Cu2+ + 2e- -> Cu, E^o red = +0.34 V Which statement regarding this electrochemical cell is not correct?

a. The initial cell potential = 0.02 V.

b. The reaction continues until the copper ion concentrations in the two cells are equal.

c. The standard cell potential is +0.34 V.

d. Reduction occurs in compartment C2.

e. The cell potential gradually decreases to 0.0 V.

Thanks for any help!

Explanation / Answer

Ans: c. The standard cell potential is +0.34 V

ECello = ERed - Eox

Here both the anode and cathode are copper electrodes, so ERed = EOx

So the standard cell potential, ECello = 0.

The concentration cell operates due to difference in concentrations in two compartments. Since copper ion concentration is more in C2, reduction occurs in C2.

As the equilibrium is attached, the cell voltage becomes zero.

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