Question

In: Chemistry

1) Calculate the standard potential (Eo value) for the following redox reaction. 2) Circle the reducing...

1) Calculate the standard potential (Eo value) for the following redox reaction.

2) Circle the reducing agent.

2NO3–(aq) + 8H+(aq) + 3Cu(s) 2NO(g) + 4H2O(l) + 3Cu2+(aq)

Eo =

Solutions

Expert Solution

NO3(aq) + 4 H+(aq) + 3 e NO(g) + 2 H2O      E0= +0.96   ----------(1)

Cu2+(aq) + 2 e Cu(s)                                  E0= +0.34     ----------(2)

Cu(s)Cu2+(aq) + 2 e E0= -0.34     ----------(3)

(1)x2 + (3)x3 2NO3(aq) + 8H+(aq) + 3Cu(s) 2NO(g) + 4H2O(l) + 3Cu2+(aq)

                                           the standard potential     E0= 2x0.96 + 3x(-0.34) = 1.92-1.02 =0.90 V

The reducing agent is Cu(s) as it reduces NO3 to NO


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