Fuming sulfuric acid: Difference between revisions

From Citizendium
Jump to navigation Jump to search
imported>David E. Volk
mNo edit summary
mNo edit summary
 
(4 intermediate revisions by 2 users not shown)
Line 1: Line 1:
{{subpages}}
{{subpages}}
'''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).
'''Fuming sulfuric acid''', or '''fuming sulphuric 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 (H<sub>2</sub>S<sub>3</sub>O<sub>10</sub>), tetrasulfuric acid (H<sub>2</sub>S<sub>4</sub>O<sub>13</sub>)  and so on up to very long [[sulfur trioxide polymer]]s, H(SO<sub>3</sub>)<sub>n</sub>H.
{{Image|Pyrosulfuric acid synthesis.jpg|center|600px|Pyrosulfuric acid is produced from sulfur trioxide and sulfuric acid.}}
 
This reaction proceeds due to the relative instability of the three (S=O) double bonds present in sulfur trioxide, relative to the presence of two double bonds and two single bonds in the acidic forms.
 
Additional sulfur trioxide molecules can be added to create [[trisulfuric acid]] (H<sub>2</sub>S<sub>3</sub>O<sub>10</sub>), [[tetrasulfuric acid]] (H<sub>2</sub>S<sub>4</sub>O<sub>13</sub>)  and so on up to very long [[sulfur trioxide polymer]]s, H(SO<sub>3</sub>)<sub>n</sub>H.[[Category:Suggestion Bot Tag]]

Latest revision as of 12:01, 19 August 2024

This article is a stub and thus not approved.
Main Article
Discussion
Related Articles  [?]
Bibliography  [?]
External Links  [?]
Citable Version  [?]
 
This editable Main Article is under development and subject to a disclaimer.

Fuming sulfuric acid, or fuming sulphuric 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
(CC) Image: David E. Volk
Pyrosulfuric acid is produced from sulfur trioxide and sulfuric acid.

This reaction proceeds due to the relative instability of the three (S=O) double bonds present in sulfur trioxide, relative to the presence of two double bonds and two single bonds in the acidic forms.

Additional sulfur trioxide molecules can be added to create trisulfuric acid (H2S3O10), tetrasulfuric acid (H2S4O13) and so on up to very long sulfur trioxide polymers, H(SO3)nH.