Suppose the galvanic cell sketched below is powered by the following reaction: Zn(s)+ SnCl2(aq) ZnCl2(aq)+ Sn(s) Write balanced equation for the half-reaction that happens at the cathode of this cell: Write balanced equation for the half-reaction that happens at the anode of this cell: Of what substance is El made? Of what substance is E2 made? What are the chemicab species in solution S1? What are the chemical species in solution 52?