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Contents

   



(Top)
  


1 Related compounds  




2 References  













Monopotassium arsenate






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From Wikipedia, the free encyclopedia
  

Monopotassium arsenate
Names
IUPAC name

Potassium dihydrogen arsorate

Other names

Macquer's salt

Identifiers

CAS Number

3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.150 Edit this at Wikidata
EC Number
  • 232-065-8

PubChem CID
UNII
UN number 1677

CompTox Dashboard (EPA)

  • InChI=1S/AsH3O4.K/c2-1(3,4)5;/h(H3,2,3,4,5);/q;+1/p-1

    Key: GVPLVOGUVQAPNJ-UHFFFAOYSA-M

  • O[As](=O)(O)[O-].[K+]

Properties

Chemical formula

 AsH2KO4
Molar mass 180.032 g·mol−1
Appearance white solid
Density 2.867 g/cm3
Melting point 288 °C (550 °F; 561 K)
Hazards
GHS labelling:

Pictograms

 GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard

Signal word

 Danger

Hazard statements

 H301, H331, H350, H410

Precautionary statements

 P201, P202, P261, P264, P270, P271, P273, P281, P301+P310, P304+P340, P308+P313, P311, P321, P330, P391, P403+P233, P405, P501

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

Infobox references

Monopotassium arsenate is the inorganic compound with the formula KH2AsO4. A white solid, this salt is used to prepared other arsenic-containing compounds, mainly pesticides. It is prepared by calcining arsenic oxide and potassium nitrate, followed by extraction with water.[1]

Relevant acid-base equilibria for aqueous solutions of this diprotic acid derived from arsenic acid are as follows:

H3AsO4 + H2O ⇌ H
2AsO−
4 + H3O+  (pKa1 = 2.19)
H
2AsO−
4 + H2O ⇌ HAsO2−
4 + H3O+  (pKa2 = 6.94)
[edit]

References

[edit]
  1. ^ Grund, S. C.; Hanusch, K.; Wolf, H. U. "Arsenic and Arsenic Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_113.pub2. ISBN 978-3527306732.{{cite encyclopedia}}: CS1 maint: multiple names: authors list (link)

Retrieved from "https://en.wikipedia.org/w/index.php?title=Monopotassium_arsenate&oldid=1160559267"
Categories: 
●Arsenates
 ●Potassium compounds
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●This page was last edited on 17 June 2023, at 08:47 (UTC).
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