The overall reaction 2co3+(aq) + 2cl-(aq) ? 2co2+(aq) + cl2(g) has the standard cell voltage eocell= 0.46 v.

given that cl2(g) + 2e-? 2cl-(aq), eo = 1.36 v,

calculate the standard reduction potential for the following the half reaction at 25oc:

co3+ + e-? co2+

1.82 v
-0.90 v
0.90 v
-1.82 v

Option (a) is the correct answer.

Explanation:

The given overall reaction will be as follows.

It is given that standard potential of the cell is 0.46 V.

Hence, the oxidation and reduction half reactions of the cell are as follows.

Reduction-half reaction: ,    

Oxidation-half reaction: ,  

Now, expression of of this reaction is as follows.

Putting the given values into the above formula as follows.

     0.46 V =   - 1.36 V

  = 1.82 V

Thus, we can conclude that standard potential of the given half cell is 1.82 V.

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