# Production of sulfuric acid using sulfur dioxide

Is it possible to create sulfuric acid using sulfur dioxide directly dissolved in water? Usually, people oxidize the $\ce{SO2}$ to sulfur trioxide ($\ce{SO3}$) first. If this is possible, why is it not done industrially?

If you try to dissolve sulfur dioxide into water, you'll get sulfurous acid instead of sulfuric acid: $$\ce{H2O + SO2 <=> H+ + HSO3-}$$