`Cu^(2+) (aq) + e^(-) to Cu^(+)(aq)`
तथा `Cu^(+)(aq) + e^(-) to Cu(s)`
के लिए इलेक्ट्रोड विभव क्रमश: +0.15 V तथा +0.50 V है। `E(Cu^(2+)//Cu)^(@)` का मान होगा

Options

A. 0.325 V
B. 0.650V
C. 0.150 V
D. 0.500 V

Answer

A

Explanation

`Cu^(2+) + e^(-) to Cu^(+)`,
`E_(1)^(@) = 0.15 V, DeltaG_(1)^(@) = -n_(1)E_(1)^(@) F`
`Cu^(+) + e^(-) to Cu,`
`E_(2)^(@) = 0.50 V, DeltaG_(2)^(@) =-n_(2)E_(2)^(@)F`
`E^(@) = ?, DeltaG^(@) =-nE^(@) F`
`therefore E^(@) = 0.65/2 = 0.325 V`