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Given that K(sp) of CuS=10^(-35) and ECu...

Given that `K_(sp)` of `CuS=10^(-35)` and `E_Cu//Cu^(2+)= (-0.34V)`.
The standard oxidation potential of `Cu|CuS|S^(2-)` Half- cell is :

A

`(1.0V)`

B

`(0.693V)`

C

`(-0.690V)`

D

(1.0V)`

Text Solution

Verified by Experts

The correct Answer is:
A
`undereline(Cu(s)+S^(2-)(aq)rightarrow(CuS(s) + 2e^(-)`
`(Cu^(2+)(aq)+S^(2-)(aq)rightarrow CuS(s)`
`E_(Cu|CuS|S^(2-)= E_Cu|Cu^(2+)) -(0.059)/(2)log K_SP = -0.34- (0.059)/(2)log 10^(-35) =-0.34+ 1.0325= 0.963V`
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