Ответ:

1. 2Al + Fe₂O₃ → Al₂O₃ + 2Fe

2Al₂O₃ + 3SiCl₄ → 4AlCl₃ + 3SiO₂

AlCl₃ + 3KOH → Al(OH)₃↓ + 3KCl

2. 2Al + 3H₂SO₄ → AI₂(SO₄)₃ + 3H₂

AI₂(SO₄)₃ + 6NaOH → 2AI(OH)₃↓ + 3Na₂SO₄

AI(OH)₃ + 3HNO₃ → AI(NO₃)₃ + 3H₂O

3. 2AI + 3CaCI₂ → 2AICI₃ + 3Ca

AICI₃ + 3H₂O → AI(OH)₃↓ + 3HCI

AI(OH)₃ + NaOH → NaAIO₂ + 2H₂O

4. 2AI + 6HBr → 2AIBr₃ + 3H₂

ALBr₃ + 3KOH → AI(OH)₃↓ + 3KBr

AI(OH)₃ + 3HCI → AICI₃ + 3H₂O