3. An electrochemical cell at 298 K is made using a copper metal electrode immer

Question

3. An electrochemical cell at 298 K is made using a copper metal electrode immersed in a 0.30 M copper sulfate solution in one compaltment and a copper metal electrode immersed in a 1.5 M copper sulfate solution in the other compartment. Cu2+(aq) + 2 e- -+ Cu(s), EO = +0.34 V Which statement regarding this electrochemical cell is NOT correct? a. The reaction continues until the copper ion concentrations in the two cells are equal. b. The initial cell potential = 0.02 V. c. The cell potential gradually decreases to 0.0 V. d. The standard cell potential is +0.34 V. e. Reduction occurs in compartment C2.

Explanation / Answer

answer : d. The standard cell potential is +0.34 V

Explanation :

for concentration cells Eo cell = 0.00 V . so

E = - 0.05916 / 2 log [Cu+2]cathode/[Cu+2]anode

    = 0.05916 / 2 log 1.5 / 0.30

    = 0.02 V

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