For each of the following reactions: write the half reactions, designating which is oxidation and which is reduction  write the over-all ionic equation.  identify which is the oxidizing agent and the reducing agent a) Cu(NO3)2 +   Fe  → Fe(NO3)2   +   Cu b) 2Al(s) + 3H2SO4 (aq) → Al2(SO4)3 (aq) + 3H2 (g) c) 2PbS(s) + 3O2 (g) → 2PbO(s) + 2SO2 (g)

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