Before revision: Gas phase chemistry In the gas phase sulfur dioxide is oxidized by reaction with the hydroxyl radical via an intermolecular reaction:SO2 + OH· → HOSO2·which is followed by:HOSO2· + O2 → HO2· + SO3In the presence of water, sulfur trioxide (SO3) is converted rapidly to sulfuric acid:SO3 (g) + H2O (l) → H2SO4 (aq) Nitrogen dioxide reacts with OH to form nitric acid: This shows the process of the air pollution being released into the atmosphere and the areas that will be affected.
After revision: Gas phase chemistry In the gas phase sulfur dioxide is oxidized to ;;sulfuric acid Nitrogen dioxide reacts with hydroxyl radicals: to form nitric acid: This shows the process of the air pollution being released into the atmosphere and the areas that will be affected.