a.

MnO2 + 4HCl đ to⟶⟶to MnCl2 + Cl2 +2H2O

3Cl2 + 2Fe to⟶⟶to 2FeCl3

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

Fe(OH)3 +3HCl --> FeCl3 + 3H2O

FeCl3 + 3AgNO3 --> 3AgCl +Fe(NO3)3

2AgCl to⟶⟶to 2Ag + Cl2

b/

2KMnO4 + 16HCl đ to⟶⟶to 2KCl + 2MnCl2 +5Cl2 +8H2O

Cl2 + H2 to⟶⟶to 2HCl

2HCl + CuO --> CuCl2 + H2O

CuCl2 + Ba(OH)2 --> Cu(OH)2 + BaCl2

BaCl2 + H2SO4 --> BaSO4 + 2HCl

c/ 

2NaCl + H2SO4 đ to⟶⟶to  Na2SO4 + 2HCl

2HCl đpdd --> H2 + Cl2

3Cl2 + 2Fe to⟶⟶to 2FeCl3

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

2NaCl + 2H2O --> đpdd cmn 2NaOH +Cl2 + H2

NaOH + HCl --> NaCl + H2O

Cl2 + Ca to⟶⟶to CaCl2

CaCl2 + 2AgNO3 --> 2AgCl + Ca(NO3)2

2AgCl to⟶⟶to 2Ag+ Cl2

d/

2NaCl + H2SO4đ to⟶⟶to Na2SO4 + 2HCl

HCl + K --> KCl +1/2H2

2KCl đpnc --> 2K +Cl2

Cl2 + 2Na to⟶⟶to 2NaCl

2NaCl + 2H2O --> đpdd cmn 2NaOH + Cl2 + H2

H2 + Cl2 to⟶⟶to 2HCl

2HCl --> đpdd H2 + Cl2

Cl2 + Cu to⟶⟶to CuCl2

CuCl2 + 2NaOH --> 2NaCl + Cu(OH)2

Cu(OH)2 + H2SO4 --> CuSO4 + 2H2O

CuSO4 + 2KOH --> K2SO4 + Cu(OH)2

K2SO4 + Ba(NO3)2 --> 2KNO3 + BaSO4

Đáp án:

 

Giải thích các bước giải:

 MnO2+4HCl-->Cl2+MnCl2+2H2O

Cl2 +Ca(OH)2-->CaOCl2+H2O

2CaOCl2--->2CaCl2+O2

CaCl2+2AgNO3-->Ca(NO3)2+2AgCl