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How can we determine if a reaction is reversible or not?

  1. Jun 27, 2007 #1
    how can we determine if a reaction is reversible or not?

    Zn2+ (aq) + 2e- -> Zn(s)
    is this a reversible reaction?

    thanks! :biggrin:
     
  2. jcsd
  3. Jun 27, 2007 #2

    chemisttree

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    That's not even a reaction... it's only a half reaction! Where did the electrons come from? The entire reaction must be shown to answer the question.
     
  4. Jun 28, 2007 #3
    oops.. this is the full reaction, it's the zinc-copper cell redox reaction.

    Cu2+(aq) + Zn(s) -> Cu(s) + Zn2+(aq)
     
  5. Jun 29, 2007 #4
    Aren't redox reactions always irreversible?
     
  6. Jul 2, 2007 #5

    chemisttree

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    They can be reversible if a reverse potential is applied as in rechargeable batteries. As shown, it is not reversible.
     
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