1. 2Cu+O2=>2CuO
CuO+SO3=>CuSO4
CuSO4+2KOH=>K2SO4+Cu(OH)2
2AgCL+Cu(OH)2=>2AgOH+CuCl2
2. 2Ba+O2=>2BaO
BaO+H2O=>Ba(OH)2
Ba(OH)2+FeCL2=>BaCL2+Fe(OH)2
BaCL2+H2SO4=>BaSO4+2HCL
3. 4Al+3O2=>2Al2O3
Al2O3+5HCL=>2ALCL3+3H2O
ALCL3+3NaOH=>AL(OH)3+3NaCL
2AL(OH)3+3H2SO4=>AL2(SO4)3+6H2O
4. 2Ca+O2=>2CaO
CaO+H2O=>Ca(OH)2
Ca(OH)2+CO2=>CaCO3+H2O
CaCO3+2HCL=>CaCL2+H2O+CO2