Question

Determine the standard electrode potential, given that the standard reduction potential for the half-reaction, Ag+ (aq) + e- → Ag(s) is +0.80 V and the standard oxidation potential for the half-reaction, Fe(s) → Fe2+(aq) + 2e-, is -0.44 V. Using this information, predict whether or not the reaction Ag(s) + Fe2+(aq) → Fe(s) + Ag+(aq) will occur spontaneously under standard conditions.

Answer 1

To determine the standard electrode potential, we need to add the standard reduction potential and the standard oxidation potential.Standard reduction potential for Ag+  aq  + e-  Ag s  is +0.80 V.Standard oxidation potential for Fe s   Fe2+ aq  + 2e- is -0.44 V.Standard electrode potential  Ecell  = Ereduction + EoxidationEcell =  +0.80 V  +  -0.44 V Ecell = +0.36 VSince the standard electrode potential is positive  +0.36 V , the reaction Ag s  + Fe2+ aq   Fe s  + Ag+ aq  will occur spontaneously under standard conditions.