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Copper reduces NO3^- into NO and NO2 dep...

Copper reduces `NO_3^-` into NO and `NO_2` depending upon conc of `HNO_3` in solution. Assuming `[Cu^(2+)]`
=0.1M, and `P_(NO)=P_(NO_2)=10^(-3)`atm and using given data answer the following questions.
`E_(Cu^(2+)//Cu)^0=+0.34` volt
`E_(NO_3^-//NO)^0=+0.96` volt
`E_(NO_3^-//NO_2)^0=+0.79` volt
at 298K `(RT)/F(2.303)=0.06` volt
At what `HNO_3` concentration thermodynamic tendency for reduction of `NO_3` into NO and `NO_2` by copper is same ?

A

`10^(1.23)M`

B

`10^(0.56)M`

C

`10^(0.66)M`

D

`10^(0.12)M`

Text Solution

Verified by Experts

The correct Answer is:
C
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