Q.

Given Cu2+  +   e-    Cu+ E0   =   0.15Volts:    Cu+ +  e-  Cu  E0  =  0.5VOLT,   E0 for Cu2+ + 2e  Cu

 

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a

0.325V

b

0.45V

c

1.2V

d

0.65V

answer is B.

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Detailed Solution

Cu+2   +   e- cu+,   E0=0.15 volts 
Cu+   +   e-      Cu          E0=0.5V
Cu+2   +   2e-      Cu      E0=?
     n1   E1   +   n2   E2    =    n3       E3
1 x  0.15   + 1    x  0.5   =  2  x  E3
E30.15+0.52=0.652=0.325 volts 
 
 

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