Species with more negative E∘ (standard reduction potential) generally acts as reducing agent, while with less negative value, E∘ act as oxidising agent. Thus, the overall reaction is Ag++Fe2+⟶Fe3++Ag The value of EMF will be, ∆E∘=Eoxidation ∘−Ereduction ∘ =−0.3995−(−0.7120) =+0.3125V