Hoàn thành chuỗi biến hóa sau: Fe FeCl2 --> Fe(OH)2 --> FeCl2 --> AlCl3 --> Al(OH)3 --> Al2O3

Đáp án+Giải thích các bước giải:

`Fe + 2HCl -> FeCl_2 + H_2↑`

`FeCl_2 + 2NaOH -> Fe(OH)_2 + 2NaCl`

`Fe(OH)_2 + BaCl_2 -> FeCl_2 + Ba(OH)_2`

`3FeCl_2 + 2Al -> 2AlCl_3+ 3Fe↓`

`AlCl_3 + 3NaOH -> Al(OH)_3 + 3NaCl`

`2Al(OH)_3 -t^o-> Al_2O_3 + 3H_2O`

- `Fe``+``2HCl``→``FeCl_2``+``H_2`

- `FeCl_2``+``2NaOH``→``Fe(OH)_2``+``2NaCl`

- `Fe(OH)_2``+``2HCl``→``FeCl_2``+``2H_2O`

- `3FeCl_2``+``2Al``→``2AlCl_3``+``3Fe`

- `AlCl_3``+``3NaOH``→``Al(OH)_3``+``3NaCl`

- `2Al(OH)_3` $\xrightarrow[]{t^o}$ `Al_2``O_3``+``3H_2O`