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Standard electrode potential (E^(0)) for...

Standard electrode potential `(E^(0))` for `OCl^(-) // Cl^(-) and Cl^(-)// (1)/(2) Cl_2 ` are respectively 0.94 V and -1.36 V . The `E^(@)` value of `OCl^(-) //Cl_2` will be

A

`-0.42 V `

B

`-2.20 V `

C

`0.52 V `

D

`1.04 V `

Text Solution

Verified by Experts

The correct Answer is:
C
(1) `2H^(oplus) + 2e^(-) + OCl^(-) to Cl^(-) + H_2O , (2 x 0.94) ` (2)` Cl^(Ɵ) to (1)/(2) Cl_2 + 1e^(-) , (-1.36 xx 1)`
(3) `2H^(oplus) + 1 e^(-) + OCl^(Ɵ) to (1)/(2) Cl_2 + H_2O , (1 xx E_3^(0)) (3) = (1) + (2)`
` 1 xx E_3^(0) = (2 xx 0.94 ) + (-1.36 xx 1) , E_(3)^(0)=((1.88 - 1.36)/(1)) = 0.52 V `
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