Vinegar electrolysis

  1. Aug 17, 2014 #1
    I tried vinegar electrolysis using 2 copper electrodes and 9v adaptor
    it gave dark brown material on the (-) electrode
    blue solution
    what is the blue solution? since i used white vinegar (which contains water) could it be copper hydroxide?or copper acetate?
    what is the brown material on the cathode?
     
  2. jcsd
  3. Aug 17, 2014 #2

    Borek

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    Staff: Mentor

    Blue is most likely copper aqua complex.
     
  4. Aug 17, 2014 #3
    ? what is this exactly? is there an exact formula of it?
     
  5. Aug 17, 2014 #4

    Borek

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    Staff: Mentor

  6. Aug 17, 2014 #5
    Thanks for this infos
    But why is it aquo? why not acetate or hydroxide ? how can i make sure it is aquo and not another copper compound??
     
  7. Aug 17, 2014 #6
    And another thing
    Is this aquo the same thing as colloid?
     
    Last edited: Aug 17, 2014
  8. Aug 17, 2014 #7

    Borek

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    Staff: Mentor

    Hydroxide is a solid. Some copper acetate complex is possible, but how much - depends on the vinegar concentration and complex stability constants.

    No. Hydroxide is a solid, aquo complex is a dissolved cation (whatever the counter ion is).
     
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