Объяснение:
4Al + 3O₂ = 2Al₂O₃
2Al₂O₃ + 3H₂SO₄ = Al₂(SO₄)₃ + 6H₂O
Al₂(SO₄)₃ + 6NaOH = 2Al(OH)₃↓ + 3Na₂SO₄
2Al(OH)₃ = Al₂O₃ + 3Н₂O
2)
4Fe + 3O₂ = 2Fe₂O₃
Fe₂O₃ + 6HNO₃ = 2Fe(NO₃)₃ + 3H₂O
Fe(NO₃)₃ + 3H₂O = Fe(OH)₃+ 3HNO₃
2Fe(OH)₃ = Fe₂O₃ + 3H₂O
Fe₂O₃ + 3H₂ = 2Fe + 3H₂O
Fe + 2HCl = FeCl₂ + H₂
Объяснение:
4Al + 3O₂ = 2Al₂O₃
2Al₂O₃ + 3H₂SO₄ = Al₂(SO₄)₃ + 6H₂O
Al₂(SO₄)₃ + 6NaOH = 2Al(OH)₃↓ + 3Na₂SO₄
2Al(OH)₃ = Al₂O₃ + 3Н₂O
2)
4Fe + 3O₂ = 2Fe₂O₃
Fe₂O₃ + 6HNO₃ = 2Fe(NO₃)₃ + 3H₂O
Fe(NO₃)₃ + 3H₂O = Fe(OH)₃+ 3HNO₃
2Fe(OH)₃ = Fe₂O₃ + 3H₂O
Fe₂O₃ + 3H₂ = 2Fe + 3H₂O
Fe + 2HCl = FeCl₂ + H₂