Fuming sulfuric acid
Jump to navigation
Jump to search
![](http://s9.addthis.com/button1-share.gif)
Fuming sulfuric acid, also called oleum, is produced by adding sulfur trioxide, SO2, to sulfuric acid. It mostly contains disulfuric acid (also called pyrosulfuric acid).
- SO3 + H2SO4 → H2S2O7
Additional sulfur trioxide molecules can be added to create trisulfuric acid, tetrasulfuric acid and so on up sulfur trioxide polymers, (SO3)n.