a, 

MnO2+ 4HCl -> MnCl2+ Cl2+ 2H2O 

2Na+ Cl2 $\buildrel{{t^o}}\over\longrightarrow$ 2NaCl 

2NaCl $\buildrel{{đpnc}}\over\longrightarrow$  2Na+ Cl2

CaO+ Cl2 $\buildrel{{t^o}}\over\longrightarrow$ CaOCl2 

Cl2+ 2NaOH -> NaCl+ NaClO+ H2O

Cl2+ H2 $\buildrel{{t^o}}\over\longrightarrow$ 2HCl 

AgNO3+ HCl -> AgCl+ HNO3 

b, 

2KMnO4+ 16HCl -> 2KCl+ 2MnCl2+ 5Cl2+ 8H2O 

2Fe+ 3Cl2 $\buildrel{{t^o}}\over\longrightarrow$ 2FeCl3

Cl2+ 2KBr -> 2KCl+ Br2 

2Fe+ 3Br2 $\buildrel{{t^o}}\over\longrightarrow$ 2FeBr3 

Br2+ 2KI -> 2KBr+ I2 

Fe+ I2 $\buildrel{{t^o}}\over\longrightarrow$ FeI2 

2Na+ I2 $\buildrel{{t^o}}\over\longrightarrow$ 2NaI 

c, 

MnO2+ 4HCl -> MnCl2+ Cl2+ 2H2O 

2K+ Cl2 $\buildrel{{t^o}}\over\longrightarrow$ 2KCl 

2KCl $\buildrel{{t^o}}\over\longrightarrow$ 2K+ Cl2 

Cl2+ 2NaI -> 2NaCl+ I2 

Cl2+ H2O $\rightleftharpoons$ HCl+ HClO 

Đáp án:

Giải thích các bước giải: 

 a)2hcl->h2+cl2

Cl2+2Na->2Nacl

2Nacl+2h2o->2Naoh+h2+cl2

Ca(oh)2+cl2--->Caocl2+h2o

Cl2+h2->2hcl

Cl2+2Naoh->Naclo+nacl+h2o

Agno3+hcl->AgCl+Hno3

b)2Kmno4+16hcl->5cl2+8h2o+2kcl+2Mncl2

3Cl2+2fe->2fecl3

Cl2+2nabr->2nacl+br2

3Br2+2fe->2febr3

Br2+2NaI->2Nabr+I2

I2+fe->feI2

I2+2Na->2naI

c) Mno2+4hcl->Mncl2+2h20+cl2

Cl2+2KI->2Kcl+I2

F2+2Kcl->2KF+Cl2

Cl2+2NaI->2nacl+I2

Cl2+H2o->HCl+hclo