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AP Chem 2007 Free Response

  1. May 21, 2007 #1
    1. The problem statement, all variables and given/known data
    My questions pertain to #4b of the free response.

    Question: Excess nitric acid is added to solid calcium carbonate. The question asks to predict a balanced equation for this reaction.

    3. The attempt at a solution

    what I wrote down was:

    H+ + CO3 ----> H2O + CO2

    which might be down the right road but isn't correct.
  2. jcsd
  3. May 22, 2007 #2


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    What about bicarbonate?

    Show the calcium as well as nitrate for completeness.
  4. May 22, 2007 #3

    I should have included that the AP exam does not require that you show spectator ions, I realized shortly after posting that my confusion was only coming from not writing in the 2+ charge for the carbonate, so I think that what I have is generally correct.
  5. May 23, 2007 #4


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    The equation is not balanced.
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