The standard reduction potentials of Cu2+|Cu and Cu2+|Cu⨁ are 0.337 V and 0.153 V, respectively. The standard electrode potential of Cu⨁|Cu half cell is:
0.184 V
0.827 V
0.490 V
0.521 V
A
0.490 V
B
0.827 V
C
0.521 V
D
0.184 V
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Solution
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Cu2++2e−→Cu...(i)E⊝1
Cu2++e−→Cu⨁...(ii)E⊝2
Net equation (Cu⨁+e−→Cu)...(iii)
E⊝3=n1E⊝1−n2E⊝2n3=2×0.337−1×0.1531=0.521V
Hence, option C is correct.
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