Consider each of the following electrode-solution interfaces, and write the equation for the electrode reaction that occurs first when the potential is moved in (1) a negative direction and (2) a positive direction from the open-circuit potential. Next to each reaction write the approximate potential for the reaction in V vs. SCE (assuming the reaction is reversible). -Pt/Cu2+(0.01M), Cd2+(0.01M), H2SO4(1M) -Pt/Sn2+(0.01M), Sn4+(0.01M), HCl(1M) -Hg/Cd2+(0.01M),Zn2+(0.01M), HCl(1M)