Al-->Al₂O₃-->AlCl₃-->Al(OH)₃-->Al₂O₃
1.4 Al+3О₂=2Al₂O₃
2.Al₂O₃+6HCl=2AlCl₃+3H₂↑
3.AlCl₃+3KOH=Al(OH)₃+3KCl
4.2Al(OH)₃=Al₂O₃+3H₂O
Al-->Al₂O₃-->AlCl₃-->Al(OH)₃-->Al₂O₃
1.4 Al+3О₂=2Al₂O₃
2.Al₂O₃+6HCl=2AlCl₃+3H₂↑
3.AlCl₃+3KOH=Al(OH)₃+3KCl
4.2Al(OH)₃=Al₂O₃+3H₂O