查看“︁氢氧化钴”︁的源代码

{{chembox
| verifiedrevid = 401965348
| Name = 氢氧化钴
| NameEn = Cobalt(II) hydroxide
| ImageFile = Cobalt hydroxide.JPG
| ImageSize = 200px
| ImageName = Blue cobalt(II) hydroxide
| ImageFile2 = Red cobalt hydroxide.JPG
| ImageSize2 = 200px
| ImageName2 = Red cobalt(II) hydroxide
| ImageFile3 = Blue cobalt hydroxide.JPG
| ImageSize3 = 200px
| ImageName3 = Blue cobalt(II) hydroxide
| IUPACName = Cobalt(II) hydroxide
| OtherNames = 氫氧化鈷(II)<br>氫氧化亞鈷
| Section1 = {{Chembox Identifiers
|  ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
|  ChemSpiderID = 8305419
|  InChI = 1/Co.2H2O/h;2*1H2/q+2;;/p-2
|  SMILES = [Co+2].[OH-].[OH-]
|  InChIKey = ASKVAEGIVYSGNY-NUQVWONBAS
|  StdInChI_Ref = {{stdinchicite|correct|chemspider}}
|  StdInChI = 1S/Co.2H2O/h;2*1H2/q+2;;/p-2
|  StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
|  StdInChIKey = ASKVAEGIVYSGNY-UHFFFAOYSA-L
|  CASNo_Ref = {{cascite|correct|CAS}}
|  CASNo = 21041-93-0
|  PubChem = 10129900
|  RTECS =
  }}
| Section2 = {{Chembox Properties
|  Formula = Co(OH)<sub>2</sub>
|  MolarMass = 92.948
|  Appearance = 玫瑰紅色或藍綠色粉末
|  Density = 3.597 g/cm<sup>3</sup>
|  Solubility = 320 µg/100mL
|  SolubleOther = 溶於酸和銨鹽溶液
|  SolubilityProduct = 1.0 x 10<sup>-15</sup>
|  MeltingPt = 168℃ 分解<ref name="icc">{{Citation
 | last =Patnaik
 | first =Pradyot
 | author-link =
 | last2 =
 | first2 =
 | author2-link =
 | publication-date =
 | date =
 | year =2003
 | title =Handbook of Inorganic Chemical Compounds
 | edition =
 | volume =
 | series =
 | publication-place =
 | place =
 | publisher =McGraw-Hill Professional
 | pages =243
 | id =
 | isbn =0070494398
 | doi =
 | oclc =
 | url =http://books.google.com/?id=Xqj-TTzkvTEC&pg=PA243&dq=%22Cobalt+hydroxide%22+OR+%22Cobalt(II)+hydroxide%22
 | accessdate =2009-03-27
 | archive-date =2020-01-26
 | archive-url =https://web.archive.org/web/20200126214650/https://books.google.com/books?id=Xqj-TTzkvTEC&pg=PA243&dq=%22Cobalt+hydroxide%22+OR+%22Cobalt%28II%29+hydroxide%22&hl=ja
 | dead-url =no
 }}</ref>
|  BoilingPt =
  }}
| Section3 = {{Chembox Structure
|  MolShape =
|  Coordination = 菱面体
|  CrystalStruct =
|  Dipole =
  }}
| Section4 = {{Chembox Thermochemistry
|  DeltaHf = -539.7 kJ·mol<sup>-1</sup>
|  DeltaHc =
|  Entropy = 79.0 J·mol<sup>-1</sup>·K<sup>-1</sup><ref name="hand2">
{{Citation
 | last = Lide
 | first = David R.
 | author-link =
 | last2 =
 | first2 =
 | author2-link =
 | publication-date =
 | date =
 | year = 1998
 | title = Handbook of Chemistry and Physics
 | edition = 87
 | volume =
 | series =
 | publication-place = Boca Raton, FL
 | place =
 | publisher = CRC Press
 | id =
 | isbn = 0849305942
 | doi =
 | oclc =
 | pages = 513
 | url =
 | accessdate =
}}</ref>
  }}
| Section7 = {{Chembox Hazards
|  ExternalMSDS = [http://msds.chem.ox.ac.uk/CO/cobalt_II_hydroxide.html Oxford University]
|  EUIndex =
|  EUClass = 有害 ('''H''')
|  RPhrases = {{R20/21/22}}-{{R36/37/38}}-{{R43}}
|  SPhrases = {{S24}}-{{S26}}-{{S36/37}}-{{S39}}<ref name="ox">{{cite web |url= http://msds.chem.ox.ac.uk/CO/cobalt_II_hydroxide.html |title= Safety (MSDS) data for cobalt (II) hydroxide |accessdate= 2009-03-27 |publisher= Oxford University |date=  |archive-date= 2009-03-09 |archive-url= https://web.archive.org/web/20090309132935/http://msds.chem.ox.ac.uk/CO/cobalt_II_hydroxide.html |dead-url= yes }}</ref>
|  MainHazards =
|  NFPA-H = 1
|  NFPA-F = 0
|  NFPA-R = 2
|  NFPA-O =
  }}
| Section8 = {{Chembox Related
|  OtherAnions = [[氯化钴]]<br />[[溴化钴]]<br />[[碘化钴]]
|  OtherCations = [[氢氧化亚铁]]<br />[[氢氧化镍]]<br />[[氢氧化铜]]
  }}
}}
'''氢氧化钴'''是二價[[鈷]]的氫氧化物，化学式为Co(OH)<sub>2</sub>。

== 性质 ==
玫瑰红色[[斜方]]结晶或粉末，不溶于水，溶于酸和铵盐溶液。

氢氧化钴虽较[[氢氧化亚铁]]稳定，但在空气中也能缓慢地被[[氧化]]成棕黑色的[[羟基氧化钴]]。<ref>杨宏孝等.无机化学(第四版).北京:高等教育出版社.ISBN 978-7-04-028478-2</ref>

氢氧化钴存在粉红色和蓝色两种变体，其中粉红色变体较为稳定，当将蓝色变体较长时间放置或加热即转变为粉红色物种。<ref name=":0">{{Cite book|title=《无机化学丛书》第九卷：锰分族、铁系、铂系|last=|first=|publisher=科学出版社|year=|isbn=7-03-002238-6|location=北京|pages=300}}</ref>

== 制备 ==
由[[氯化钴]]溶液与[[氢氧化钠]]溶液反应而生成，再经洗涤、离心分离制得成品。

向钴(II)盐溶液中碱金属氢氧化物时，依赖反应条件，可以得到蓝色或粉红色的氢氧化钴(II)沉淀。<ref name=":0" />

: <math>\rm \ CoCl_2+2NaOH\rightarrow Co(OH)_2+2NaCl</math>

== 用途 ==
用作玻璃和搪瓷的着色剂、制取其他[[钴]]化合物的原料，以及清漆和涂料的干燥剂。

== 参考资料 ==
{{reflist}}

{{鈷化合物}}
{{氢氧化物}}

[[Category:二价钴化合物]]
[[Category:氢氧化物]]