РИО BaCL2+K2SO3-BaSo3+KCL
BaCI₂+ K₂SO₃ = BaSO₃↓+2KCI Ba²⁺ + 2CI⁻+ 2K⁺ + SO₃²⁻ = BaSO₃↓+2K⁺ + CI⁻ Ba²⁺ + SO₃²⁻ = BaSO₃↓