Fuming sulfuric acid: Difference between revisions

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'''Fuming sulfuric acid''', also called '''oleum''', is produced by adding [[sulfur trioxide]], SO<sub>2</sub>, to [[sulfuric acid]].  It mostly contains disulfuric acid (also called pyrosulfuric acid).
'''Fuming sulfuric acid''', also called '''oleum''', is produced by adding [[sulfur trioxide]], SO<sub>3</sub>, to [[sulfuric acid]].  It mostly contains disulfuric acid (also called pyrosulfuric acid).


:SO<sub>3</sub> + H<sub>2</sub>SO<sub>4</sub> &rarr; H<sub>2</sub>S<sub>2</sub>O<sub>7</sub>
:SO<sub>3</sub> + H<sub>2</sub>SO<sub>4</sub> &rarr; H<sub>2</sub>S<sub>2</sub>O<sub>7</sub>


Additional sulfur trioxide molecules can be added to create trisulfuric acid, tetrasulfuric acid and so on up [[sulfur trioxide polymer]]s, (SO<sub>3</sub>)<sub>n</sub>.
Additional sulfur trioxide molecules can be added to create trisulfuric acid, tetrasulfuric acid and so on up [[sulfur trioxide polymer]]s, (SO<sub>3</sub>)<sub>n</sub>.

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Fuming sulfuric acid, also called oleum, is produced by adding sulfur trioxide, SO3, 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.