Question

Al-al2o3-ak(no3)2-al(oh)3-al2o3

Answer 1

1) 4Al + 3O₂ → 2Al₂O₃
2) Al₂O₃ + 6HNO₃ → 2Al(NO₃)₃ + 3H₂O
3) Al(NO₃)₃ + NaOH → Al(OH)₃ + 3NaNO₃
4) 2Al(OH)₃ → Al₂O₃ + 3H₂O