Predict whether reaction will occur between the pairs given below :
`Fe^(3+)and I^(-)`
`[" Given "E_(Fe^(3+)|Fe^(2+))=+0.77 V , E_((1/2)I_(2)|I^(-))=+0.54 V, E_(Ag^(+)|Ag)^(@)=+0.79 V and E_((Sn)^(4+)|Sn^(2+))^(@)=+0.15 V ] `

Explanation

We know (i) a redox couple with higher standard reduction potential `(E^(0))` is a stronger oxidising agent than the one of with a lower `E^(0)` , Conversely a redox couple with a lower `e^(0)` is a stronger reducing agent than the one with a higher `E^(0)` is a stronger oxidising and reducing agents react spomtaneously to form weaker oxidising and reducing agents .
Since `E_(Fe^(3+)|Fe^(2+))^(0) gt E_((1/2)I_(2)|I^(-)),Fe^(3+)` is a stronger oxidising agent than `I_(2)` and `I_(2)` is a stronger reducing agent than `Fe^(2+)` , Therefore ` Fe^(3+)` and `I^(-)` will react spontaneously under standard conditions to form `Fe^(2+)` and `I_(2)`
`2Fe^(3+)(aq)+2I^(-)(aq)to2Fe^(2+)I_(2)(s)`