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Sodium hypochlorate has formed a dark brown precipitate?

  1. Apr 15, 2016 #1
    I boiled a solution of sodium hypochlorate down to make what I thought was sodium chloride and sodium chlorate - a light brown coloured powder.

    However, this evening when I looked at it again it had formed a darker brown powder that was almost like soil with a few white clumps here and there. The way it clumps together almost makes it appear wet, but I'm pretty sure it isn't because when I touch it it feels dry.

    Any ideas what's happened here?
     
  2. jcsd
  3. Apr 15, 2016 #2

    Borek

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    Are you sure there were no contaminants in the solution? In general all salts involved are just white.
     
  4. Apr 17, 2016 #3

    DrDu

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    You mean hypochlorite, maybe?
     
  5. Apr 19, 2016 #4
    What material did you boil it down in?
    If he meant that, then chlorate is three oxidation states higher. Where is the oxidizing agent?
     
  6. Apr 19, 2016 #5

    Borek

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    It is there. It is called hypochlorite.
     
  7. Apr 20, 2016 #6
    What is hypochlorate? I think hypochlorite is his starting material.
     
  8. Apr 20, 2016 #7

    Borek

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    Yes, this is most likely a typo (actually quite a common error), and the solution contains hypochlorite. And the hypochlorite is the oxidizing agent.
     
  9. Apr 20, 2016 #8
    OK then what is getting reduced?
     
  10. Apr 20, 2016 #9

    Borek

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    Hypochlorite as well.
     
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