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Question about concentration cell

Discussion in 'MCAT Study Question Q&A' started by EMT313, Sep 4, 2014.

  1. EMT313

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    Is a concentration cell a galvanic cell (meaning its spontaneous and anode is negative) or a electrolytic cell (meaning its non-spontaneous and its anode is positive)?
     
  2. Cawolf

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    A galvanic cell with the anode being in low concentration and the cathode being in high concentration.
     
  3. justadream

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    @Cawolf

    Theoretically, could you have an electrolytic concentration cell?
     
  4. Cawolf

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    I guess so? I am not really sure what the point would be though.

    I thought about it and it seems like if you applied a voltage greater than the E value of the reverse reaction then you could increase the concentration in the higher concentration cell.

    But why use electrical energy to produce a gradient that already exists?
     
  5. justadream

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    @Cawolf
    Why not? Increasing the gradient can do work (e.g., Oxidative Phosphorylation uses a gradient)
     
  6. Cawolf

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    True. I was just saying I haven't heard of it before - but it may be possible.
     

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