Dithionic acid
Dithionic acid, Template:Chem2, is the inorganic compound with the formula Template:Chem2. It is the doubly protonated derivative of dithionate, a well-characterized dianion. Dithionic acid is mainly observed and characterized as an aqueous solution.[1]
Synthesis
Dithionates can be made by oxidizing a sulfite (from the +4 to the +5 oxidation state), but on a larger scale they are made by oxidizing a cooled aqueous solution of sulfur dioxide with manganese dioxide:
The manganese dithionate solution formed can then be converted to dithionate salts of other metals by metathesis reactions:
Concentrated solutions of dithionic acid can subsequently be obtained treating a barium dithionate solution with sulfuric acid:
See also
- Sodium dithionate
- Hypophosphoric acid, the phosphorus equivalent.
References
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- ↑ Template:Greenwood&Earnshaw pp. 715-716
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