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Homework Help: Electrode in electrolysis

  1. Sep 3, 2009 #1
    1. The problem statement, all variables and given/known data

    Why are carbon, platinum and gold inert?

    2. Relevant equations

    Duplet or Octet configuration

    3. The attempt at a solution
    We use inert elements such as carbon, platinum and gold as the electrodes to prevent the electrodes react with the electrolyte. As far as I know the inert elements are noble gases only that satisfy the duplet (He element) or octet configuration.
    Since carbon, platinum and gold do not satisfy the duplet or octet configuration, why are they inert?
  2. jcsd
  3. Sep 5, 2009 #2


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    "inert" is a bit of an exaggeration. "Resistant" is a better term.

    You should review http://en.wikipedia.org/wiki/Noble_metals" [Broken]
    Last edited by a moderator: May 4, 2017
  4. Sep 6, 2009 #3
    Thank you for your respond.
    I have already read about noble metal and I am still confused..hehehe...Why are gold and platinum resistant to corrosion? I have already read about Galvanic Series too. What is the basic to arrange the Galvanic Series? Why is Carbon placed on the first position in Galvanic Series?
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