查看“︁过硫酸钾”︁的源代码

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{{chembox
|   Name = 过硫酸钾
|   ImageFile =Potassium persulfate.svg
|   ImageSize = 200px 
|   ImageName = 过硫酸钾
|   ImageFile1 = Potassium-persulfate-xtal-1997-3D-balls.png
|   OtherNames = 过二硫酸钾<br/>E-922<br/>Potassium Peroxydisulfate<br/>Anthion<br/>Potassium Perdisulfate
| Section1 = {{Chembox Identifiers
|   CASNo = 7727-21-1
|    CASNo_Ref = {{cascite|correct|CAS}}
|   PubChem = 24412
|   EINECS = 231-781-8
|   UNNumber = 1492
|   RTECS = SE0400000
  }}
| Section2 = {{Chembox Properties
|   Formula = K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>
|   MolarMass = 270.322
|   Appearance = 无色粉末
|   Density = 2.477 g/cm<sup>3</sup> <ref>Pradyot Patnaik. ''Handbook of Inorganic Chemicals''. McGraw-Hill, 2002, ISBN 0070494398</ref>
|   Solubility = 1.75 g/100 mL (0 °C) <br> 5.29 g/100 ml (20 °C)
|   MeltingPt = <100 °C
|   Melting_notes = 分解
  }}
| Section7 = {{Chembox Hazards
|   ExternalMSDS = [http://www.ilo.org/public/english/protection/safework/cis/products/icsc/dtasht/_icsc16/icsc1133.htm ICSC 1133]
|   EUIndex = 016-061-00-1
|   EUClass = {{Chembox EUHazardSymbol|O|Xn|Xi}}
|   RPhrases = {{R8}}, {{R22}}, {{R36/37/38}}, {{R42/43}}
|   SPhrases = {{S2}}, {{S22}}, {{S24}}, {{S26}}, {{S37}}
|   NFPA-H = 2
|   NFPA-F = 0
|   NFPA-R = 1
|   NFPA-O = OX
|   FlashPt =
|   PEL = 
  }}
| Section8 = {{Chembox Related
|   OtherAnions = [[亚硫酸钾]]<br/>[[硫酸钾]]<br/>[[过一硫酸氢钾]]
|   OtherCations = [[过硫酸钠]]
|   OtherFunctn = 
|    Function = 
|   OtherCpds = 
  }}
}}

'''过硫酸钾'''是一种[[无机化合物]]，化学式为K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>。

==性质==
过硫酸钾为无色或白色细小粉末、或片状[[三斜]]结晶，溶于水，不溶于[[醇]]，水溶液呈酸性。熔度为100°C，并生成[[焦硫酸钾]]。室温情况下，水溶液会缓慢分解生成[[过氧化氢]]，呈强[[氧化性]]。与有机物混合，可引发[[爆炸]]。

==制法==
[[硫酸铵]]与[[硫酸]]配成的电解液进行[[电解]]，在阳极氧化会产生[[过硫酸铵]]，然后加入[[硫酸钾]]进行[[复分解]]反应，经冷却、分离、结晶、干燥可制得。
:阳极：<math>\rm \ 2HSO_4^--2e^-\rightarrow H_2S_2O_8</math>
:阴极：<math>\rm \ 2H^++2e^-\rightarrow H_2\uparrow</math>
:<math>\rm \ (NH_4)_2SO_4+H_2S_2O_8\rightarrow (NH_4)_2S_2O_8+H_2SO_4</math>
:<math>\rm \ (NH_4)_2S_2O_8+K_2SO_4+H_2SO_4\rightarrow K_2S_2O_8+2NH_4HSO_4</math>

==用途==
==参见==
*[[过硫酸钠]]
*[[过硫酸铵]]

==参考资料==
{{reflist}}

{{鉀化合物}}

[[Category:过硫酸盐]]
[[Category:钾化合物]]
[[Category:氧化剂]]
[[Category:自由基引发剂]]
[[Category:缺少物质图片的化学品条目]]