Which graph correctly correlates `E_(cell)` as a funcation of concentrations for the cell (for different values of `M` and `M'`)?
`Zn(s) + Cu^(2+) (M) rarr Zn^(2+) (M') + Cu(s), E_(cell)^(@) = 1.10 V`
`X`-axis : `(log_(10)[Zn^(2+)])/([Cu^(2+)])` Y-axis : `E_("cell")`

Options

A.
B.
C.
D.

Answer

B

Explanation

According to Nernst equation,
`E_("cell") = E_("cell")^(@) + (0.0591)/(2)"log"([Cu^(2+)])/([Zn^(2+)])`
`E_("cell") = E_("cell")^(@) - (0.0591)/(2)"log"([Cu^(2+)])/([Zn^(2+)])`
or `y = c + (-m)x`
Thus increase in `[Zn^(2+)]` will increase the slope in negative side.