Chlorous Acid - Wikipedia

Trang chủ » Ph Hclo2 » Chlorous Acid - Wikipedia

Có thể bạn quan tâm

Chlorous acid
Chlorous acid
Chlorous acid
Chlorous acid
Chlorous acid
Names
IUPAC name Chlorous acid, Chloric (III) acid
Identifiers
CAS Number
  • 13898-47-0 checkY
3D model (JSmol)
  • Interactive image
ChEBI
  • CHEBI:29219 checkY
ChemSpider
  • 22861 checkY
KEGG
  • C01486 checkY
PubChem CID
  • 24453
UNII
  • 7JRT833T5M checkY
CompTox Dashboard (EPA)
  • DTXSID80160853 Edit this at Wikidata
InChI
  • InChI=1S/ClHO2/c2-1-3/h(H,2,3) checkYKey: QBWCMBCROVPCKQ-UHFFFAOYSA-N checkY
  • InChI=1/ClHO2/c2-1-3/h(H,2,3)Key: QBWCMBCROVPCKQ-UHFFFAOYAO
SMILES
  • O[Cl+][O-]
Properties
Chemical formula HClO2
Molar mass 68.46 g/mol
Acidity (pKa) 1.96
Conjugate base Chlorite
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). ☒N verify (what is checkY☒N ?) Infobox references
Chemical compound

Chlorous acid is an inorganic compound with the formula HClO2. It is a weak acid. Chlorine has oxidation state +3 in this acid. The pure substance is unstable, disproportionating to hypochlorous acid (Cl oxidation state +1) and chloric acid (Cl oxidation state +5):

2 HClO2 → HClO + HClO3

Although the acid is difficult to obtain in pure substance, the conjugate base, chlorite, derived from this acid is stable. One example of a salt of this anion is the well-known sodium chlorite. This and related salts are sometimes used in the production of chlorine dioxide.

Preparation

[edit]

HClO2 can be prepared through reaction of barium or lead chlorite and dilute sulfuric acid:

Ba(ClO2)2 + H2SO4 → BaSO4 + 2 HClO2 Pb(ClO2)2 + H2SO4 → PbSO4 + 2 HClO2

Stability

[edit]

Chlorous acid is a powerful oxidizing agent, although its tendency to undergo disproportionation counteracts its oxidizing potential.[citation needed]

Chlorine is the only halogen to form an isolable acid of formula HXO2.[1] Fluorine is resistant to oxidation, having a −1 oxidation state even in hypofluorous acid, and is thus unable to form any higher oxoacids; despite the name, fluorite minerals are chemically fluoride compounds. Neither bromous acid nor iodous acid has ever been isolated. A few salts of bromous acid, bromites, are known, but no iodites.[1]

References

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

Media related to Chlorous acid at Wikimedia Commons

  • v
  • t
  • e
Hydrogen compounds
  • H3AsO3
  • H3AsO4
  • HArF
  • HAt
  • HSO3F
  • H[BF4]
  • HBr
  • HBrO
  • HBrO2
  • HBrO3
  • HBrO4
  • HCl
  • HClO
  • HClO2
  • HClO3
  • HClO4
  • HCN
  • HCNO
  • H2CrO4/H2Cr2O7
  • H2CO3
  • H2CS3
  • HF
  • HFO
  • HI
  • HIO
  • HIO2
  • HIO3
  • HIO4
  • HMnO4
  • H2MnO4
  • H2MoO4
  • HNC
  • NaHCO3
  • HNCO
  • HNO
  • HNO2
  • HNO3
  • H2N2O2
  • HNO5S
  • H3NSO3
  • H2O
  • H2O2
  • H2O3
  • H2O4
  • H2O5
  • H3PO2
  • H3PO3
  • H3PO4
  • H4P2O7
  • H5P3O10
  • H[AuCl4]
  • H2[PtCl6]
  • H2OsCl6
  • H2S
  • H2S2
  • H2Se
  • H2SeO3
  • H2SeO4
  • H4SiO4
  • H2[SiF6]
  • HSCN
  • HNCS
  • H2SO3
  • H2SO4
  • H2SO5
  • H2S2O3
  • H3O
  • H2S2O6
  • H2S2O7
  • H2S2O8
  • CF3SO3H
  • H2Te
  • H2TeO3
  • H6TeO6
  • H4TiO4
  • H2Po
  • H[Co(CO)4]
  • v
  • t
  • e
Salts and covalent derivatives of the chlorite ion
HClO2 He
LiClO2 Be B C N TCDO F Ne
NaClO2 Mg Al Si P S Cl Ar
KClO2 Ca(ClO2)2 Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd AgClO2 Cd In Sn Sb Te I Xe
Cs Ba(ClO2)2 * Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra ** Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
 
* La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb
** Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No
Stub icon

This inorganic compound–related article is a stub. You can help Wikipedia by adding missing information.

  • v
  • t
  • e

Từ khóa » Ph Hclo2