M M X– X– (c2) (c1) M+ M+ Semi permeable membrane Consider the above electrochemical cell where a metal electrode (M) is undergoing redox reaction by forming M + (M → M+ + e). The cation M+ is present

Question

M M X– X– (c2) (c1) M+ M+ Semi permeable membrane Consider the above electrochemical cell where a metal electrode (M) is undergoing redox reaction by forming M + (M → M+ + e). The cation M+ is present in two different concentrations c1 and c2 as shown above. Which of the following statement is correct for generating a positive cell potential?

(A) If c1 is present at anode, then c1 = c2
(B) If c1 is present at cathode, then c1 < c2
(C) If c1 is present at cathode, then c1 > c2
(D) If c1 is present at anode, then c1 > c2

Prashant Kotian · Accepted Answer

Correct answer: C. (1) If C1 is at anode  cell reaction M +(C2)  M +(C1) Ecell = – 0.059 log 2 C C Ecell > 0  C1 < C2 (2) If C1 is at cathode M +(C1)  M +(C2) Ecell = – 0.059 log 1 C C  C2 < C1

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