Hypoiodous acid

Names

IUPAC name

Hypoiodous acid

Other names

Hypoiodous acid

Identifiers

CAS Number

14332-21-9^N

3D model (Jmol)

CHEBI:29231^Y

109942^Y

InChI=1S/HIO/c1-2/h2H^Y
Key: GEOVEUCEIQCBKH-UHFFFAOYSA-N^Y

SMILES

Properties

Chemical formula

HIO

Molar mass

143.89 g/mol

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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Infobox references

Hypoiodous acid is the inorganic compound with the chemical formula HIO. It forms when an aqueous solution of iodine is treated with mercuric or silver salts. It rapidly decomposes by disproportionation:^[1]

5 HIO → HIO₃ + 2I₂ + 2H₂O

Hypoiodous acid is a weak acid with a pK_a of about 11. The conjugate base is hypoiodite (IO⁻). Salts of this anion can be prepared by treating I₂ with alkali hydroxides. They rapidly disproportionate to form iodides and iodates.^[1]

References

1 2 Holleman, A.F. (2001). Inorganic chemistry (1st English ed., [edited] by Nils Wiberg. ed.). San Diego, Calif. : Berlin: Academic Press, W. de Gruyter. ISBN 0-12-352651-5.

Hydrogen compounds

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