Question

Hoàn thành chuỗi phản ứng hóa học sau:

FeCl₃  → Fe(OH)₃ → Fe₂O₃ → Fe (SO₄)₃ → FeCl₃

Answer 1

$FeCl_3 + 3KOH \to Fe(OH)_3 + 3KCl$
$2Fe(OH)_3 \xrightarrow{t^o} Fe_2O_3 + 3H_2O$
$Fe_2O_3 + 3H_2SO_4 \to Fe_2(SO_4)_3 + 3H_2O$
$Fe_2(SO_4)_3 + 3BaCl_2 \to 3BaSO_4 + 2FeCl_3$

Answer 2

FeCl₃ + 3NaOH ➝ Fe(OH)₃ + NaCl

2Fe(OH)₃ ➝ Fe₂O₃ + 3H₂O
Fe₂O₃ + 3H₂SO₄ ➝ Fe₂(SO₄)₃ + H₂O

Fe₂(SO₄)₃ + 6HCl ➝ 2FeCl₃ + 3H₂SO₄

Answer 3

FeCl₃ + 3NaOH --> Fe(OH)₃ + 3NaCl

2Fe(OH)₃ -^to-> Fe₂O₃ + 3H₂O

Fe₂O₃ + 3H₂SO₄ --> Fe₂(SO₄)₃ + 3H₂O

Fe(SO₄)₃ + 3BaCl --> FeCl₃ + 3BaSO₄↓

Answer 4

(1) FeCl₃ + 3NaOH ---> Fe(OH)₃ ↓ + 3NaCl

(2) 2Fe(OH)₃ t^o ---> Fe₂O₃ + 3H₂O

(3) Fe₂O₃ + 3H₂SO₄ ---> Fe₂(SO₄)₃ + 3H₂O

(4) Fe₂(SO₄)₃ + 3BaCl₂ ---> 2FeCl₃ + 3BaSO₄ ↓

Answer 5

Các phản ứng xảy ra:

$F\text{e}C{l}_3+3NaOH{\to }^{}F\text{e}(OH{)}_3+3NaC\mathrm{l\; (1)}$

$2F\text{e}(OH{)}_3\stackrel{t^o}{\to }F{\text{e}}_2{O}_3+3H_2\mathrm{O\; (2)}$

$F{\text{e}}_2{O}_3+3H_{2}S{O}_4{\to }^{}F{\text{e}}_2(S{O}_4{)}_3+3H_2\mathrm{O\; (3)}$

$F{\text{e}}_2(S{O}_4{)}_3+3BaC{l}_2{\to }^{}2F\text{e}C{l}_3+3BaS{O}_4$(4)