The standard emf for the given cell reaction `Zn + Cu^(2+) to Cu + Zn^(2+)` is `1.10V` at `25^@C`. The emf for the cell reaction when `0.1 M Cu^(2+) and 0.1 M Zn^(2+)` solution are used at `25^@C ` is …….

Options

A. `1.10 V`
B. `0.110 V`
C. `-1.10 V`
D. `-110 V`

Answer

A

Explanation

`E_("cell") = E_("cell")^(@) - (0.0592)/(2) log ((Zn^(2+)))/((Cu^(2+)))`
`= 1.10 - (0.0592)/(2)log (0.1)/(0.1)`
`= 1.10 - (0.0592)/2 log 1`
`= 1.10 - (0.0592)/2 xx 0`
`1.10 V`