Suppose the galvanic cell sketched below is powered by the following reaction: Mg(s)+CuCl2(aq) MgCl2(aq)+Cu(s) E1 E2 S1 S2 Write a balanced equation for the half-reaction that happens at the cathode of this cell. 0 -- Write a balanced equation for the half-reaction that happens at the anode of this cell. Of what substance is E1 made? ? Of what substance is E2 made? What are the chemical species in solution S1? What are the chemical species in solution S2?