Question

Hoàn thành sơ đồ chuyển hóa :

a) Fe ---(1)---> Fe₃O₄---(2)--->FeCl₂---(3)--->FeCl₃

b) BaO ---(1)--->Ba(OH)₂---(2)--->BaCO₃---(4)--->BaCl₂

BaO--->BaCO₃

BaCO₃--->BaO

Answer 1

a) 1. 3Fe + 2O₂ \(\underrightarrow{to}\) Fe₃O₄

2. Fe₃O₄ + 8HCl → FeCl₂ + 2FeCl₃ + 4H₂O

3. 2FeCl₂ + Cl₂ \(\underrightarrow{to}\) 2FeCl₃

b) 1. BaO + H₂O → Ba(OH)₂

2. Ba(OH)₂ + CO₂ → BaCO₃↓ + H₂O

3. BaCO₃ + 2HCl → BaCl₂ + CO₂↑ + H₂O

BaO + CO₂ → BaCO₃↓

BaCO₃ \(\underrightarrow{to}\) BaO + CO₂↑

Answer 2

a)

\(\left(1\right)3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)

\(\left(2\right)Fe_3O_4+8HCl\underrightarrow{t^o}FeCl_2+4H_2O+2FeCl_3\)

\(\left(3\right)2FeCl_2+Cl_2\underrightarrow{t^o}2FeCl_3\)

b)

\(\left(1\right)BaO+H_2O\rightarrow Ba\left(OH\right)_2\)

\(\left(2\right)Ba\left(OH\right)_2+CO_2\rightarrow BaCO_3+H_2O\)

(3)\(BaCO_3+2HCl\rightarrow BaCl_2+CO_2+H_2O\)

Answer 3

\(BaO+CO_2\underrightarrow{t^o}BaCO_3\)