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How do you know what salt to use for salt bridge?

  1. Feb 5, 2016 #1
    1. The problem statement, all variables and given/known data
    its not a homework question but I didn't know where else to ask.
    I want to know how we know which salt to use for salt bridge. I think I understand what we don't want the salt bridge to do --we don't want it to react, and that its function is to neutralize the solution so anions or cations don't build up and the cell stops working. So salt bridge replenishes the ions, right?
    But how do we know which salt wont react? Is it a matter of comparing reduction potentials?
    thanks for any help!

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Feb 6, 2016 #2

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    ... and, that said, things turn into a "crap-shoot." "Everything" reacts (or is totally inert). "Artful" selection yields "minimal" effects. Cells "with transport" are more difficult in which to accomplish this goal.
     
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