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Ksp and precipitation of carbonates

  1. Jul 4, 2016 #1

    TT0

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    1. The problem statement, all variables and given/known data
    Screen Shot 2016-07-04 at 1.46.53 PM.png

    2. Relevant equations


    3. The attempt at a solution
    The lower the Ksp, the more insoluble. Therefore, I chose B since strontium and barium carbonates have the lowest Ksp. However, the question asks which carbonate will precipitate and I know that all carbonates are insoluble. Can someone explain to me what did I think wrong?

    Cheers!
     
  2. jcsd
  3. Jul 4, 2016 #2

    Borek

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    Staff: Mentor

    Why don't you calculate instead of guessing?
     
  4. Jul 4, 2016 #3

    TT0

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    Sorry, but I can't see what to calculate. Could you please tell me where can I calculate something?

    Thanks!
     
  5. Jul 4, 2016 #4

    Borek

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    Staff: Mentor

    You are given Ksp, you are given concentrations - you can easily check whether the precipitate should form or not. If you don't see how - read about solving Ksp related problems.

    Don't forget about dilution.
     
  6. Jul 4, 2016 #5

    TT0

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    I see, after calculating, strontium and barium carbonate won't dissolve as the molarity of the ions in the solution exceed the amount that will dissolve. Is the answer B?

    Thanks
     
  7. Jul 4, 2016 #6

    Borek

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    Staff: Mentor

    Yes.
     
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