Q.

The equilibrium constant for the reaction Zn(s)+Sn2+(aq)Zn2+(aq)+Sn(s)is1×1020 at 298K. The magnitude of standard electrode potential of Sn/Sn2+  if  EZn+20/Zn=0.76V.is  ________ ×102V (Nearest integer).

Given 2.303RTF=0.059V

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answer is 17.

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Detailed Solution

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Zn(s)+Sn+2(aq)Zn2+(aq)+Sno(s)Kc=1020 Ecell =0 at equilibrium 

Ecello =0.0592log1020E0Sn2+/SnEZn+2/zn=0.59E0Sn/Sn+2=17×102V

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