Question

Sắp xếp các chất thành dãy chuyển hóa . Viết PTHH
a) Fe2O , Fe , FeCl3 , Fe(NO3)3 , Fe(OH)3
b) Cu(NO3)2 , Cu(OH)2 , CuCl2 , CuO , Cu

Answer 1

a) Fe---->FeCl3----->Fe(OH)3----->Fe2O3----->Fe(NO3)3

2Fe + 3Cl2 -----> 2FeCl3

FeCl3 + 3NaOH -----> Fe(OH)3\(\downarrow\) + 3NaCl

2Fe(OH)3 --to--> Fe2O3 + 3H2O

Fe2O3 + 6HNO3 -----> 2Fe(NO3)3 + 3H2O

b) Cu ----->CuO----->CuCl2----->Cu(NO3)2---->Cu(OH)2

2Cu + O2 ---to--> 2CuO

CuO + 2HCl ------> CuCl2 + H2O

CuCl2 + 2AgNO3 ------> Cu(NO3)2 + 2AgCl\(\downarrow\)

Cu(NO3)2 + 2KOH ------> Cu(OH)2\(\downarrow\) + 2KNO3

Answer 2

a) Fe → Fe₂O₃ → FeCl₃ → Fe(NO₃)₃ → Fe(OH)₃

1. 4Fe + 3O₂ \(\underrightarrow{to}\) 2Fe₂O₃

2. Fe₂O₃ + 6HCl → 2FeCl₃ + 3H₂O

3. FeCl₃ + 3AgNO₃ → Fe(NO₃)₃ + 3AgCl↓

4. Fe(NO₃)₃ + 3NaOH → 3NaNO₃ + Fe(OH)₃↓

Answer 3

b) Cu → CuO → CuCl₂ → Cu(NO₃)₂ → Cu(OH)₂

1. 2Cu + O₂ \(\underrightarrow{to}\) 2CuO

2. CuO + 2HCl → CuCl₂ + H₂O

3. CuCl₂ + 2AgNO₃ → Cu(NO₃)₂ + 2AgCl↓

4. Cu(NO₃)₂ + 2NaOH → 2NaNO₃ + Cu(OH)₂↓