Can a solution of 1 M copper sulphate be stored in a vesel made of nickel.
Given: `E_(Ni^(2+)//Ni)^(0) = -0.25 V`,
`E_(Cu^(2+)//Cu)^(0) = - 0.34 V`

Explanation

The reaction ,
`Ni+ CuSO_(4) to NiSO_(4) + Cu`
should not occur, if `CuSO_(4)` solution to be stored in a nickel vessel.
The cell would be `Ni|Ni^(2+)||Cu^(2+)|Cu`
The emf of the cell is `E_(Cu^(2+)//Cu)^(0) - E_(Ni^(2+)//Ni)^(0) `
` = 0.34 - (-0.25)`
` = 0.59 V`
The emf is positive . This means copper sulphate reacts with nickel , Hence `CuSO_(4)` cannot be stored in a nickel vessel.