K2so3+hci+kci+so2+h2o
K₂SO₃ + 2HCl = 2KCl + SO₂ + H₂O 2K⁺ + SO₃²⁻ + 2H⁺ + 2Cl⁻ = 2K⁺ + 2Cl⁻ + SO₂ + H₂O SO₃²⁻ + 2H⁺ = SO₂ + H₂O