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Q.

The equilibrium constant KC of the reaction: Cu(s)+2Ag(aq)+Cu2+(aq)+2Ag(s) is 10×1015, calculate the Ecell  of this reaction at 298 K

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a

0.04736 V

b

0.4736mV

c

0.04736mV

d

0.4736 V

answer is B.

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Detailed Solution

The equilibrium constant KC of the reaction: Cu(s)+2Ag(aq)+Cu2+(aq)+2Ag(s) is 10×1015

Ecell =Ecell °-0.059nlogQ

Ecell =Ecell °-0.059nlogQ

At equilibrium,

Ecell °=0.059nlogK

Ecell °=0.0592log10×1015

Ecell °=0.059×8

Ecell °=0.4736 V

Therefore, the correct option is (B).

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