ORGANIC CHEMISTRY Chapter 15 25 SO3H t hosoa-so2= Benzenesulfonic acid or conc. H2SO4/75 苯磺酸 Oδ SO H t S H O O SO SORT +H+=— SO3H H2SO +ho H2SO4 △ Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 15 S O O O δ+ δ− + SO3 H SO3 + H+ SO3H H + or conc. H2SO4 / 75 25 SO3H 苯磺酸 Benzenesulfonic acid H2SO4-SO3 SO3H + H2O H2SO4 + H2SO4