Ответ:
а) NaCl → HCl → FeCl₂ → FeCl₃ → AgCl
2NaCl+H₂SO₄=Na₂SO₄+2HCl
2HCl+Fe=FeCl₂+H₂
2FeCl₂ +Cl₂=2FeCl₃
FeCl₃ +2AgNO₃=2AgCl↓+Fe(NO₃)₂
б) KBr → Br₂ → ZnBr₂ → HBr → Br₂ → NaBrO₃
2KBr+Cl₂=2KCl+Br₂
Br₂+ZnJ₂= ZnBr₂+J₂
ZnBr₂+2HCl=ZnCl₂+Br₂
4 HBr + O₂ = 2 H₂O + 2 Br₂
или 2KMnO₄ + 16HBr =5Br₂ + 2KBr + 2MnBr₂ + 8H₂O
3Br₂ + 6NaOH = NaBrO₃ + 5NaBr + 3H₂O
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Ответ:
а) NaCl → HCl → FeCl₂ → FeCl₃ → AgCl
2NaCl+H₂SO₄=Na₂SO₄+2HCl
2HCl+Fe=FeCl₂+H₂
2FeCl₂ +Cl₂=2FeCl₃
FeCl₃ +2AgNO₃=2AgCl↓+Fe(NO₃)₂
б) KBr → Br₂ → ZnBr₂ → HBr → Br₂ → NaBrO₃
2KBr+Cl₂=2KCl+Br₂
Br₂+ZnJ₂= ZnBr₂+J₂
ZnBr₂+2HCl=ZnCl₂+Br₂
4 HBr + O₂ = 2 H₂O + 2 Br₂
или 2KMnO₄ + 16HBr =5Br₂ + 2KBr + 2MnBr₂ + 8H₂O
3Br₂ + 6NaOH = NaBrO₃ + 5NaBr + 3H₂O