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Electrochemistry: reference electrode

  1. Dec 11, 2014 #1
    Reduction half reaction : Cu2++2e- -> Cu(s)
    I have a doubt in using the reference electrode.
    For example if I have the calomel electrode (ESCE=0.24V) how do I use it with the copper half cell? Are these reactions correct?
    Cu2++2e- -> Cu(s)
    2Hg+2Cl -> Hg2Cl2+2e-
    To get Ecell=0.24+ECu|Cu2+
     
    Last edited: Dec 11, 2014
  2. jcsd
  3. Dec 11, 2014 #2

    Borek

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    Staff: Mentor

    Draw a potential line - just like a horizontal axis of the plot.

    Mark potentials of both half cells.

    Cell potential is the distance between them.
     
  4. Dec 11, 2014 #3
    My question is different. It's about the cell reaction. Not finding the potential from graph.
     
  5. Dec 11, 2014 #4

    Borek

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    Staff: Mentor

    You have already listed both half cell reactions. If you need a full one, just combine them.
     
  6. Dec 11, 2014 #5
    My question : Are those reactions correct?
    I'll edit the post.
     
  7. Dec 11, 2014 #6

    Borek

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    Staff: Mentor

    No such thing as Cl in the second reaction, but I guess it is just a typo.
     
  8. Dec 11, 2014 #7
    Sorry its cl-
     
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