1.CO+CuO---->2. CO+Fe2O3----->3.CO2+H2O----->4.CO2+KOH----->5.CO2+CuO----->6.CO2+Fe2O3---->7.S1O2+Fe2O3---->8.S1O2+CuO---->9.S1O2+KOH----->10.HCl+KOH---->11.HCl+Fe2O3------>12.HCl+CuO---->13.HCl+CuSO4---->14.KOH+CuSO4------>HÓA 9
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