In this series of reactions, sulfur dioxide SO2SO2SO2 is first oxidized to sulfur trioxide SO3SO3SO3, which then reacts with potassium hydrogensulfate KHSO4KHSO4KHSO4 to form potassium sulfate K2SO4K2SO4K2SO4 and barium sulfate BaSO4BaSO4BaSO4 simultaneously.
In this series of reactions, sulfur dioxide SO2SO2SO2 is first oxidized to sulfur trioxide SO3SO3SO3, which then reacts with potassium hydrogensulfate KHSO4KHSO4KHSO4 to form potassium sulfate K2SO4K2SO4K2SO4 and barium sulfate BaSO4BaSO4BaSO4 simultaneously.
Overall reaction:
2SO2 + O2 → 2SO3
3SO3 + KHSO4 → K2SO4 + BaSO4