Arsenate
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2008-05-11T04:51:56Z
Alexbot
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robot Adding: [[bs:Arsenat]]
{{Chembox new
|ImageFile=Arsenate.png
|ImageSize=
|IUPACName=arsorate
|OtherNames=
|Section1= {{Chembox Identifiers
| CASNo=
| PubChem=27401
| SMILES=[O-][As](=O)([O-])[O-]
}}
|Section2= {{Chembox Properties
| Formula=AsO<sub>4</sub><sup>3-</sup>
| MolarMass=138.919
| Appearance=
| Density=
| MeltingPt=
| BoilingPt=
| Solubility=
}}
|Section3= {{Chembox Hazards
| MainHazards=
| FlashPt=
| Autoignition=
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The '''arsenate''' [[ion]] is AsO<sub>4</sub><sup>3−</sup>.
An '''arsenate''' (compound) is some compound that contains this ion.
==Ions==
Arsenate is much like [[phosphate]].
* In acid conditions we have [[arsenic acid]], H<sub>3</sub>AsO<sub>4</sub>;
* in weakly acid conditions we have the '''dihydrogen arsenate''' ion, H<sub>2</sub>AsO<sub>4</sub><sup>−</sup>;
* in weakly basic conditions we have '''hydrogen arsenate''' ion HAsO<sub>4</sub><sup>2−</sup>;
* and finally, in basic conditions, the arsenate ion AsO<sub>4</sub><sup>3−</sup>.
Arsenate has a valency of 5 and is also known as pentavalent arsenic
== Arsenate poisoning ==
Arsenate can replace inorganic [[phosphate]] in the step of [[glycolysis]] that produces[[1,3-bisphosphoglycerate]] to produce [[1-arseno-3-phosphoglycerate]] instead. This molecule is unstable and quickly hydrolyzes, forming the next intermediate in the pathway, [[3-phosphoglycerate]]. Therefore glycolysis proceeds, but the ATP molecule that would be generated from [[1,3-bisphosphoglycerate]] is lost - arsenate is an uncoupler of glycolysis.
== External links ==
{{Commons|Arsenic}}
{{wiktionary|arsenic}}
* [http://www.atsdr.cdc.gov/HEC/CSEM/arsenic/ Case Studies in Environmental Medicine - Arsenic Toxicity]
[[Category:Oxoanions]]
{{inorganic-compound-stub}}
[[ar:زرنيخات]]
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[[ru:Арсенаты]]
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