1) Cl2 → HCl → MgCl2 → AgCl
H2+Cl2 → 2HCl
Mg+2HCl → MgCl2+H2
MgCl2+2AgNO3 → Mg(NO3)2+2AgCl↓
2) Br2→ HBr → NaBr2 → → Br2 → I2
H2+Br2 → 2HBr
HBr+NaOH → NaBr+H2O
2NaBr+Cl2 → Br2+2NaCl
2LiI + Br2 → 2LiBr + I2
1) Cl2 → HCl → MgCl2 → AgCl
H2+Cl2 → 2HCl
Mg+2HCl → MgCl2+H2
MgCl2+2AgNO3 → Mg(NO3)2+2AgCl↓
2) Br2→ HBr → NaBr2 → → Br2 → I2
H2+Br2 → 2HBr
HBr+NaOH → NaBr+H2O
2NaBr+Cl2 → Br2+2NaCl
2LiI + Br2 → 2LiBr + I2