1) Cl2-->HCl-->NaCl-->AgCl

2) Br2-->HBr - - > KBr - - >Br2-->FeBr3-->AgBr

1. Cl2->HCl->NaCl->AgCl

Cl2 + H2 = 2HCl

Na2PbO2 + 4HCl = 2NaCl + PbCl2 + 2H2O

NaCl + AgNO2 = NaNO2 + AgCl

2.

1) H2 + Br2 = 2 HBr

2) MgO + 2 HBr = MgBr2 + H2O

3) MgBr2 + Cl2 = MgCl2 + Br2

4) 2 Fe + 3 Br2 = 2FeBr3

5) FeBr3 + 3KOH = Fe (OH) 3 + 3 KBr

6) Fe (OH) 3 + 3 HBr = FeBr3 + 3 H2O

7) 3 AgNO3 + FeBr3 = 3 AgBr (в осадок) + Fe (NO3) 3

1.

Cl2 + H2 = 2HCl

HCI+NaOH=NaCI+H2O

NaCl + AgNO2 = NaNO2 + AgCl

2.

Br2 + H2 = 2HBr

HBr (p) + KOH (p) = KBr + H2O

2 KBr + 2 H 2 SO 4 (конц.) = Br 2 + SO 2↑ + K 2 SO 4 + 2 H 2 O

2 Fe + 3 Br2 (насыщ.) = 2 FeBr3

FeBr3 + AgNO 3 = AgBr + Fe (NO3) 3