15.写出下列电池的电极反应及电池反应:-|||-(1) |AgCl(g)|KCl(aq)|(H)_(2)(Cl)_(2)(s)|Hg-|||-(2)Ag|AgBr|Br (aq)|| (e)^3+, ^2+(aq.)|Pt-|||-(3) |(H)_(2)(gcdot (P)^theta )HCl(aq)(Cl)_(2)(g,(P)^theta )|Pt-|||-(4) |ZnO(s)|KOH(aq)|HgO(s)|Hg