№1ZnCI₂ + 2NaOH = Zn(OH)₂ + 2NaCIZn(OH)₂+ 2KOH = K₂ZnO₂ + 2H₂O.K₂ZnO₂ + 2H₂SO₄(избыт.) = K₂SO₄ + ZnSO₄ + 2H₂OZnSO₄ + 2NaOH = Zn(OH)₂↓ + Na₂SO₄Zn(OH)₂ + t = ZnO + H₂O№2Mg + H₂SO₄ = MgSO₄ + H₂MgSO₄ + 2C = MgS + 2CO₂MgS + HCI = MgCI₂ + H₂S2H₂S + O₂ = 2S + 2H₂O2H₂S + 3O₂ = 2SO₂ +2H₂O2SO₂ + O₂ = 2SO₃SO₃ + H₂O=H₂SO₄H₂SO₄ + Cu(OH)₂= CuSO₄+ 2H₂O