Using the standard electrode potentials given in the Table-8.1, predict if the reaction between the following is feasible :
(a) `Fe_((aq))^(3+)andI_((aq))^(-)`
(b) `Ag_((aq))^(+)andCu_((s))`
( c) `Fe_((aq))^(3+)andCu_((s))`
(d) `Ag_((s))andFe_((aq))^(3+)`
(e) `Br_(2(aq))andFe_((aq))^(2+)`

Explanation

(a) `Fe_((aq))^(3+)andI_((aq))^(-)` probable reaction …
`2Fe_((aq))^(3+)+2I_((aq))^(-)to2Fe_((aq))^(2+)+I_(2(s))`

Value of `E^(@)` is positive, therefore reaction is possible.
(b) `Ag_((aq))^(+)+Cu_((s))` Probable reaction is
`2Ag_((aq))^(+3)+Cu_((s))to2Ag_((s))+Cu_((aq))^(+2)`

Value of `E^(@)` positive, therefore reaction is possible.
( c) `Fe_((aq))^(+3)+Cu_((s))` posiible reaction between them.

Value of `E^(@)` positive therefore reaction is possible.
(d) `Ag_((s))+Fe_((aq))^(+3)` possible reaction between them.

`E^(@)` is negative so reaction is not possible.
(e) `Br_(2(aq))+Fe_((aq))^(+2)` possible reaction between them.

`E^(@)` is positive, therefore reaction is possible.