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Ksp and common ion question

  1. Oct 5, 2016 #1
    1. The problem statement, all variables and given/known data
    Is it possible to precipitate 99.0% of 0.010 M Ce3+ by adding oxalate (C2O42-) without precipitating 0.010 M Ca2+
    CaC2O4 Ksp = 1.3 x 10-8 Ce2(C2O4)3 Ksp = 5.9 x 10-30

    2. Relevant equations
    1.3x10-8 = [0.01M][C2O4-]
    5.9x10-30=[0.01M]2[C2O4]3

    3. The attempt at a solution
    All Ive been able to do is set up those Ksp equations but I'm not sure what to do from here
     
  2. jcsd
  3. Oct 5, 2016 #2

    Borek

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    Staff: Mentor

    What is the concentration of Ce3+ after 99% has been removed?
     
  4. Oct 5, 2016 #3
    1x10-4M presumably considering no volume is given to convert molarity to moles and mass
     
  5. Oct 6, 2016 #4

    Borek

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    Staff: Mentor

    Does this number help in solving the problem further?
     
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