An excess of liquid mercury is added to an acidified solution of 10 raise to power of -3 M Fe(+3).It is found that 5% of Fe(+3) remains at equilibrium at 25 degree celsius. Calculate E° Hg22+/Hg assuming that only reaction occurring is-
2Hg + 2Fe+3 = Hg22+(aq) + 2Fe+3.