Cu(OH)₂ + H₂SO₄ = CuSO₄ + 2H₂O
CuSO₄ + Fe = FeSO₄ + Cu
2Cu + O₂ = 2CuO
CuO + 2HNO₃ = Cu(NO₃)₂ + 2H₂O
Zn + H₂SO₄ = ZnSO₄ + H₂
ZnSO₄ + 2NaOH = Zn(OH)₂ + Na₂SO₄
Zn(OH)₂ + 2KOH = K₂ZnO₂ + 2H₂O
K₂ZnO₂ + 4HCl = 2KCl + ZnCl₂ + 2H₂O
2Fe(OH)₃ = Fe₂O₃ + 3H₂O
Fe₂O₃ + 3CO = 2Fe + 3CO₂
2Fe + 3Cl₂ = 2FeCl₃
FeCl₃ + 3NaOH = Fe(OH)₃ + 3NaCl