a)

4HCl+MnO2->MnCl2+Cl2+2H2O

2Fe+3Cl2->2FeCl3

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

NaCl+AgNO3->NaNO3+AgCl

b)

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

Cl2+H2->2HCl

Fe+2HCl->FeCl2+H2

2FeCl2+Cl2->2FeCl3

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

2AgCl->2Ag+Cl2

Cl2+2NaBr->2NaCl+Br2

Đáp án:

2HCl $\buildrel{{đpdd}}\over\longrightarrow$  H2+ Cl2

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

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

NaCl +AgNO3 --> AgCl + NaNO3

2KMnO4 + 16HCl đ $\buildrel{{t^o}}\over\longrightarrow$ 2KCl + 2 MnCl2 + 5Cl2 + 8H2O

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

2HCl + Fe  --> FeCl2 + H2

FeCl2 +1/2Cl2$\buildrel{{t^o}}\over\longrightarrow$ FeCl3

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

2AgCl $\buildrel{{t^o}}\over\longrightarrow$ 2Ag + Cl2

Cl2 + 2NaBr --> 2NaCl + Br2

Giải thích các bước giải: