4.
а)3Zn²⁺+2PO₄³⁻=Zn₃(PO₄)₂↓
3ZnCI₂+2H₃PO₄=Zn₃(PO₄)₂↓+6HCI
б)2AI³⁺ + 6OH⁻ = 2AI(OH)₃↓
AI₂(SO₄)₃ + 6NaOH = 2AI(OH)₃↓ + 3Na₂SO₄
в)Ag⁺+SO₃=Ag₂SO₃↓
2AgCI+Na₂SO₃=Ag₂SO₃↓+2NaCI
г)CO₃²⁻+2H⁺=CO₂↑+H₂O
Na₂CO₃+2HCI=2NaCI+CO₂↑+H₂O
г)Ag⁺+Br⁻=AgBr↓
AgNO₃+NaBr=AgBr↓+NaNO₃
д)Cu(OH)₂+H⁺=Cu²⁺+2H₂O
Cu(OH)₂+2HCI=CuCI₂+2H₂O
8.
а)CuCI₂ + 2AgNO₃ = 2AgCI↓ + Cu(NO₃)₂
Cu²⁺ + 2CI⁻ + 2Ag⁺ + 2NO₃⁻ = 2AgCI↓ + Cu²⁺ + 2NO₃⁻
2CI⁻ + 2Ag⁺ = 2AgCI↓
б) AI(OH)₃+3HNO₃=AI(NO₃)₃+3H₂O
AI(OH)₃+3H⁺+3NO₃⁻=AI³⁺+3NO₃⁻+3H₂O
AI(OH)₃+3H⁺=AI³⁺+3H₂O
в)ZnCO₃+HNO₃=Zn(NO₃)₂+CO₂↑+H₂O
ZnCO₃+2H⁺+2NO₃⁻=Zn²⁺+2NO₃⁻+CO₂↑+H₂O
ZnCO₃+2H⁺=Zn²⁺+CO₂↑+H₂O
г)MgCO₃+2HCI=MgCI₂+CO₂↑+H₂O
MgCO₃+2H⁺+2NO₃⁻=Mg²⁺+2NO₃⁻+CO₂↑+H₂O
MgCO₃+2H⁺=Mg²⁺+CO₂↑+H₂O
г)Li₂SO₃+2HCI=2LiCI+SO₂↑+H₂O
2Li⁺+SO₃²⁻+2H⁺+2CI⁻=2Li⁺+2CI⁻+SO₂↑+H₂O
SO₃²⁻+2H⁺=SO₂↑+H₂O
д)Cu(OH)₂+H₂SO₄=CuSO₄+2H₂O
Cu(OH)₂+2H⁺+SO₄²⁻=Cu²⁺+SO₄²⁻+2H₂O
Cu(OH)₂+2H⁺=Cu²⁺+2H₂O