Recent questions tagged standard-reduction-potential

Identify the reaction from following having top position in EMF series (Std. red. potential) according to their electrode potential at 298 K. (1) K+ + 1e– → K(s) (2) Mg2+ + 2e– → Mg(s) (3) Fe2+ + 2e– → Fe(s) (4) Au3+ + 3e– → Au(s)