6HCl+Fe2O3->2FeCl3+3H2O
2FeCl3+3Mg->3MgCl2+2Fe
MgCl2+Na2CO3->2NaCl+MgCO3
MgCO3-to>MgO+CO2
MgO+H2SO4->MgSO4+H2O
MgSO4+BaCl2->BaSO4+MgCl2
MgCl2+2NaOH->2NaCl+Mg(OH)2
2NaCl+2H2O-đp/cmn>2NaOH+H2+Cl2
NaOH+FeCl3->Fe(OH)3+NaCl
2Fe(OH)3-to>Fe2O3+3H2O
Fe2O3+3H2-to>2Fe+3H2O
Fe+CuSO4->FeSO4+Cu
Cu+2H2SO4đặc-to>CuSO4+SO2+2H2O
CuSO4+Fe->FeSO4+Cu
Cu+2AgNO3->Cu(NO3)2+2Ag