View source for Barium bromate

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{{chembox
| IUPACName = Barium bromate
| OtherNames = Barium bromate(V)
| Section1 = {{Chembox Identifiers
|   ChemSpiderID = 55607
|   InChI=1/Ba.2BrHO3/c;2*2-1(3)4/h;2*(H,2,3,4)/q+2;;/p-2
|   InChIKey = VEASZGAADGZARC-NUQVWONBAI
|   StdInChI=1S/Ba.2BrHO3/c;2*2-1(3)4/h;2*(H,2,3,4)/q+2;;/p-2
|   StdInChIKey = VEASZGAADGZARC-UHFFFAOYSA-L
  }}
| Section2 = {{Chembox Properties
|   Reference = <ref name="Kirk-Othmer">{{Kirk-Othmer | first1 = S. D. | last1 = Ukeles | first2 = M. | last2 = Freiberg | contribution = Bromine, Inorganic Compounds | doi = 10.1002/0471238961.021815131001031 | year = 2002}}.</ref>
|   Formula = Ba(BrO<sub>3</sub>)<sub>2</sub>
|   MolarMass = 393.13 g mol<sup>−1</sup>
|   Appearance = white crystalline solid
|   MeltingPt = 270 °C ''decomp.''
  }}
| Section8 = {{Chembox Related
|   OtherAnions = [[Barium chlorate]]<br/>[[Barium iodate]]
|   OtherCations = [[Calcium bromate]]<br/>[[Strontium bromate]]
|   OtherCpds = [[Barium bromide]]<br/>[[Barium hypobromite]]<br/>[[Barium bromite]]
  }}
}}
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{{chembox
| Name = Barium bromate monohydrate
| IUPACName = Barium bromate — water (1/1)
| Section1 = {{Chembox Identifiers
|   StdInChI=1S/Ba.2BrHO3.H2O/c;2*2-1(3)4;/h;2*(H,2,3,4);1H2/q+2;;;/p-2
|   StdInChIKey = SRLAISWMODXCQE-UHFFFAOYSA-L
|   CASNo = 10326-26-8
  }}
| Section2 = {{Chembox Properties
|   Reference = <ref name="Kirk-Othmer"/>
|   Formula = Ba(BrO<sub>3</sub>)<sub>2</sub>·H<sub>2</sub>O
|   MolarMass = 411.15 g mol<sup>−1</sup>
|   Appearance = white crystalline solid
|   MeltingPt = 180–200 °C ''dehydr.''
|   Density = 4.0 g cm<sup>−3</sup>
  }}
}}
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'''Barium bromate''', Ba(BrO<sub>3</sub>)<sub>2</sub>, is the [[barium]] [[salt]] of [[bromic acid]]. It is used as a corrosion inhibitor.<ref name="Kirk-Othmer"/>

==Preparation==
Barium bromate is usually prepared by the electrolysis of [[sodium bromide]] solution at 65–70&nbsp;°C, in the presence of [[dichromate]] and using [[anode]]s of [[lead dioxide]] or [[iron]] and [[cathode]]s of [[stainless steel]] or [[copper]].<ref>{{citation | first1 = Takasi | last1 = Osuga | first2 = Kiichiro | last2 = Sugino | title = Electrolytic Production of Bromates | journal = J. Electrochem. Soc. | volume = 104 | issue = 7 | pages = 448–51 | year = 1957 | doi = 10.1149/1.2428623}}.</ref> The sodium bromate can be crystallized by cooling the electrolyte, and any unoxidized bromide recycled.<ref name="Kirk-Othmer"/>

Barium bromate can also be prepared by reacting [[bromine]] with [[sodium hydroxide]] solution at 50–90&nbsp;°C.<ref name="Kirk-Othmer"/><ref name="IL84830">{{citation | inventor1-first = Aavi | inventor1-last = Prager | inventor2-first = Shaul | inventor2-last = Smilovitch | inventor3-first = Mira | inventor3-last = Freiberg | inventor4-first = Haim | inventor4-last = Hariton | assignee = Bromine Compounds Ltd. | title = Alkali and alkaline earth metal bromide and bromate solid mixtures and process for preparation thereof | country-code = IL | patent-number = 84830 | publication-date = 1995-01-24}}.</ref>
:3 Br<sub>2</sub> + 3 OH<sup>−</sup> {{eqm}} BrO{{su|b=3|p=−}} + 5 Br<sup>−</sup> + 3 H<sup>+</sup>

==Decomposition==
Anhydrous barium bromate decomposes at about 270&nbsp;°C to give [[barium bromide]] and [[oxygen]]:<ref name="Kirk-Othmer"/>
:Ba(BrO<sub>3</sub>)<sub>2</sub> &rarr; BaBr<sub>2</sub> + 3 O<sub>2</sub>
Controlled decomposition in vacuo at 250&nbsp;°C gives [[barium bromite]]:<ref>{{citation | first1 = A. J. | last1 = Downs | first2 = C. J. | last2 = Adams | editor1-first = J. C., Jr. | editor1-last = Bailar | editor2-first = H. J. | editor2-last = Emeleus | editor3-first = R. | editor3-last = Nyholm | editor4-first = A. F. | editor4-last = Trotman-Dickenson | title = Comprehensive Inorganic Chemistry | volume = 2 | publisher = Pergamon | location = Oxford | year = 1973 | pages = 1419–20}}.</ref>
:Ba(BrO<sub>3</sub>)<sub>2</sub> &rarr; Ba(BrO<sub>2</sub>)<sub>2</sub> + O<sub>2</sub>

==Notes and references==
===Notes===
{{reflist|group=note}}

===References===
{{reflist}}

[[Category:Barium compounds]]
[[Category:Bromates]]

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