Answer, whether under standard conditions, the following reactions are possible or not:
(i) Will copper reduce `Ag^(+) " to " Ag`? Given `E_(Ag^(+)//Ag)^(@) = 0.799 " volt" , E_(Cu^(2+)//Cu)^(@) = - 0.337` volt
(ii) Will `Fe^(3+)` be reduced to `Fe^(2+)` by `Sn^(2+)` ions? given
`{:(Fe^(3+) | Fe^(2+) = 0.771 " volt"),(Sn^(2+) |Sn^(4+) = - 0.250 " volt"):}`
(iii) would you use a silver spon to stir a solution of `Cu(NO_(3))_(2)` ?

Answer

(i) Yes, `E_("cell")^(@) Cu| Cu^(2+) || Ag^(+) | Ag` is positive (+0.462 volt)
(ii) Yes, `E_("cell")^(2)" " Pt | Sn^(4+), Sn^(2+)|| Fe^(3+), Fe^(2+)| Pt` is positive (+0.621 volt)
(iii) Yes, the reaction does not occur