Consider the cell `:`
`Cd(s)|Cd^(2+)(1.0M)||Cu^(2+)(1.0M)|Cu(s)`
If we wish to make a cell with a more positive voltage using the same substances, we should

Options

A. Increase both `[Cd^(2+)]` and `[Cu^(2+)]` to `2.0M`
B. Decrease the `[Cd^(2+]` to `1.0m`
C. Increase the `[Cu^(2+)]` to `2.0M`
D. Decrease both the `[Cd^(2+)]` and `[Cu^(2+)]` to `0.01M`

Answer

b,c

Explanation

`Cd(s)underset((1.0M))(+Cu^(2+))+rarr underset((1.0M))(C d^(2+)+)Cu(s)`
`E_(cell)=E^(c-)._(cell)-(0.059)/(2)log .([Cd^(2+)])/([Cu^(2+)])`
`E_(cell)` increases when conditions as in `(b)` and `(c)` made.