Bromous acid

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Bromous acid
Bromige saeure.png
Identifiers
PubChem 165616
ChemSpider 145144 YesY
ChEBI CHEBI:29247 YesY
Jmol-3D images Image 1
Properties
Molecular formula HBrO2
Molar mass 112.911 g/mol
Related compounds
Other anions Hydrobromic acid; hypobromous acid; bromic acid; perbromic acid
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Bromous acid is an acid with the formula HBrO2. It has bromine in the +3 oxidation state. The salts of bromous acid are called bromites. The acid is not stable and only occurs as an intermediate; for example, in the oxidation of hypobromites.[1]

Chemistry[edit]

Bromous acid can be produced by classical chemical or electrochemicals method via anodic oxidation.[citation needed]

HBrO + HClO → HBrO2 + HCl

Also disproportioning of hypobromous acid will give bromous acid and hydrobromic acid.[citation needed]

2 HBrO → HBrO2 + HBr

Lastly, a synproportion reaction of bromic acid and hydrobromic acid gives bromous acid.[citation needed]

2 HBrO3 + HBr → 3 HBrO2

Compounds[edit]

Several bromites are stable and have been isolated. For example NaBrO2· 3H2O and Ba(BrO2)2·H2O.[1]

Use[edit]

Bromites can be used for the reduction of permanganates to manganates.[1]

2MnO
4
+ BrO
2
+ OH → 2MnO2−
4
+ BrO
3
+ H2O

References[edit]

  1. ^ a b c Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0-12-352651-5