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Draw the Lewis structure of oxalic acid (H2C2O4)

  1. Apr 28, 2005 #1
    There are many different types of kidney stones, but the most common is calcium oxalate, CaC2O4. The pH range of blood is 7.2-7.3. The pH of urine ranges from 4 to 8.

    Draw the Lewis structure of oxalic acid (H2C2O4) and the oxalate anion (C2O4-2).

    H2C2O4 Ka1 = 5.6×10-2, Ka2=5.42×10-5

    CaC2O4 Ksp = 1.3 × 10-8

    Given the data above, suggest a treatment for dissolving calcium oxalate kidney stones. What would you recommend to prevent the formation of calcium oxalate kidney stones?

    I have no idea how to do this. But I managed to draw the lewis diagrams though...
  2. jcsd
  3. Apr 29, 2005 #2


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    Would there be more precipitation of calcium oxalate at higher pH or lower pH?
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