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A galvanic cell consists of an Z, ZnSO4(aq) half-cell, and Al, AlCl3(aq) half cell, and a salt bridge. For Zn2+(aq) + 2e- --> Zn(s) at 25C, Eo = -0.76V. For Al3+(aq) + 3e- --> Al(s) at 25C, Eo = -1.66 V.