Na₂S + ZnCI₂= 2NaCI +ZnS
2Na⁺ + S²⁻ + Zn²⁺ +2CI⁻= 2Na⁺ + 2CI⁻ +ZnS
S²⁻ + Zn²⁺ = ZnS↓
ZnS + 2NaCI = ZnCI₂ + Na₂S
ZnS + 2Na⁺ +2CI⁻ = Zn²⁺ +2CI⁻ + 2Na⁺ + S²⁻
ZnS + = Zn²⁺ + S²⁻
Na₂SO₃ + BaCI₂= 2NaCI + BaSO₃↓
2Na⁺ + SO₃²⁻ + Ba²⁺ + 2CI⁻= 2Na⁺ + 2CI⁻ + BaSO₃↓
SO₃²⁻ + Ba²⁺ = BaSO₃↓
ВОЗМОЖНО ТАК:
CaSO₃ + 2HCI = CaCI₂ + SO₂↑ + H₂O
CaSO₃ + 2H⁺ + 2CI⁻ = Ca²⁺ + 2CI⁻ + SO₂↑ + H₂O
CaSO₃ + 2H⁺ = Ca²⁺ + SO₂↑ + H₂O
Pb(NO₃)₂ +2 NaI = PbI ↓+ 2NaNO₃
Pb²⁺ +2NO₃⁻ +2 Na⁺ + 2I = PbI + 2Na⁺ + 2NO₃⁻
Pb²⁺ + 2I = PbI ↓