Difference between revisions of "Iodic acid"

From WikiChem
Jump to: navigation, search
Line 1: Line 1:
 +
{{Chembox
 +
| Name =
 +
| ImageFile =
 +
| ImageSize =
 +
| IUPACName = iodic acid
 +
| OtherNames =
 +
| Section1 = {{Chembox Identifiers
 +
|  CASNo = 7782-68-5
 +
|  EINECS = 231-962-1
 +
|  ChemSpiderID = 22761
 +
|  InChI = InChI=1S/HIO3/c2-1(3)4/h(H,2,3,4)
 +
  }}
 +
| Section2 = {{Chembox Properties
 +
|  Reference = <ref name="G&E">{{Greenwood&Earnshaw1st|page=1010}}.</ref>
 +
|  Formula = HIO<sub>3</sub>
 +
|  MolarMass = 175.91 g mol<sup>−1</sup>
 +
|  Appearance = white crystals
 +
|  Density =
 +
|  MeltingPt = 100 °C ''decomp.''
 +
|  Solubility =
 +
|  SolubleOther =
 +
|  Solvent =
 +
|  pKa = 0.804
 +
  }}
 +
| Section3 = {{Chembox Structure
 +
|  Reference = <ref name="G&E"/>
 +
|  CrystalStruct =
 +
|  Coordination =
 +
|  MolShape = pyramidal; ''r''(I=O) = 181&nbsp;pm, ''r''(I–OH) = 189&nbsp;pm, O=I=O = 101.4°, O=I–OH = 97°
 +
  }}
 +
| Section7 = {{Chembox Hazards
 +
|  ExternalMSDS =
 +
|  EUIndex = not listed
 +
|  FlashPt = non-flammable
 +
  }}
 +
| Section8 = {{Chembox Related
 +
|  OtherAnions = [[Hydriodic acid]]<br/>[[Periodic acid]]
 +
|  OtherCpds = [[Chloric acid]]<br/>[[Bromic acid]]
 +
  }}
 +
}}
 
'''Iodic acid''', HIO<sub>3</sub>, is a moderately strong [[oxoacid]] of [[iodine]]. It forms a series of salts called [[iodate]]s.
 
'''Iodic acid''', HIO<sub>3</sub>, is a moderately strong [[oxoacid]] of [[iodine]]. It forms a series of salts called [[iodate]]s.
  
Iodic acid may be prepared by the oxidation of suspensions of iodine in water, either by [[electrolysis]] or with [[nitric acid]].<ref name="G&E">{{Greenwood&Earnshaw1st|page=1010}}.</ref> Unlike [[Chloric acid|chloric]] and [[bromic acid]]s, it can be isolated as a white crystalline air-stable solid. The solid decomposes on heating, first to HIO<sub>3</sub>·I<sub>2</sub>O<sub>5</sub> at about 100&nbsp;°C, then to [[iodine pentoxide]] at about 200&nbsp;°C.
+
Iodic acid may be prepared by the oxidation of suspensions of iodine in water, either by [[electrolysis]] or with [[nitric acid]].<ref name="G&E"/> Unlike [[Chloric acid|chloric]] and [[bromic acid]]s, it can be isolated as a white crystalline air-stable solid. The solid decomposes on heating, first to HIO<sub>3</sub>·I<sub>2</sub>O<sub>5</sub> at about 100&nbsp;°C, then to [[iodine pentoxide]] at about 200&nbsp;°C.<ref name="G&E"/>
  
 
==Notes and references==
 
==Notes and references==

Revision as of 10:17, 10 September 2010

IUPAC name iodic acid
Identifiers
InChI InChI=InChI=1S/HIO3/c2-1(3)4/h(H,2,3,4)
CAS number [7782-68-5]
EC number 231-962-1
ChemSpider 22761
Properties[1]
Chemical formula HIO3
Molar mass 175.91 g mol−1
Appearance white crystals
Melting point

100 °C decomp.

Acidity (pKa) 0.804
Structure[1]
Molecular geometry pyramidal; r(I=O) = 181 pm, r(I–OH) = 189 pm, O=I=O = 101.4°, O=I–OH = 97°
Hazards
EU index number not listed
Flash point non-flammable
Related compounds
Other anions Hydriodic acid
Periodic acid
Other compounds Chloric acid
Bromic acid
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Iodic acid, HIO3, is a moderately strong oxoacid of iodine. It forms a series of salts called iodates.

Iodic acid may be prepared by the oxidation of suspensions of iodine in water, either by electrolysis or with nitric acid.[1] Unlike chloric and bromic acids, it can be isolated as a white crystalline air-stable solid. The solid decomposes on heating, first to HIO3·I2O5 at about 100 °C, then to iodine pentoxide at about 200 °C.[1]

Notes and references

Notes

References

  1. 1.0 1.1 1.2 1.3 Greenwood, Norman N.; Earnshaw, A. Chemistry of the Elements; Pergamon: Oxford, 1984; p 1010. ISBN 0-08-022057-6.

External links

Error creating thumbnail: Unable to save thumbnail to destination
This page is currently licensed under the Creative Commons Attribution 3.0 Unported license and any later versions of that license.