Disulphurous acid
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| Surname | Disulphurous acid | |||||||||
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Pyrosulphurous acid |
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| Molecular formula | H 2 S 2 O 5 | |||||||||
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| Molar mass | 146.14 g mol −1 | |||||||||
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| As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . | ||||||||||
Disulphurous acid or pyrosulfurous acid is an oxo acid of sulfur . The molecular formula of the compound is H 2 S 2 O 5 . So far the acid could not be isolated in free form, it is only stable in the form of its salts. Under disulfites , the salts are understood to this acid.
In contrast to disulfuric acid , the two sulfur atoms in disulfuric acid are directly connected to one another. This bond is significantly longer than a regular sulfur-sulfur single bond, which explains the instability of the disulfites.
Web links
Commons : Disulphurous Acid - Collection of images, videos and audio files
Individual evidence
- ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
- ↑ Entry on disulphurous acid. In: Römpp Online . Georg Thieme Verlag, accessed on March 20, 2016.
- ^ AF Holleman , N. Wiberg : Inorganische Chemie . 103rd edition. Volume 1: Basics and main group elements. Walter de Gruyter, Berlin / Boston 2016, ISBN 978-3-11-049585-0 , p. 650 (reading sample: Part A - Basics of the chemistry of hydrogen. Google book search ).
- ↑ Disulphurous acid. In: Chemgapedia. Retrieved January 21, 2016 .
- ↑ Erwin Riedel, Christoph Janiak: Inorganic Chemistry . 8th edition. De Gruyter, 2011, ISBN 978-3-11-022566-2 , pp. 454-455 .