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Homework Help: AP chemistry 2006 Form A Questions

  1. May 14, 2007 #1
    1. The problem statement, all variables and given/known data
    I'm doing #5 in this Ap Chemistry 2006 Form A Free Response Questions. Here's the link http://www.collegeboard.com/prod_downloads/student/testing/ap/chemistry/_ap06_frq_chemistry.pdf

    2. Relevant equations

    3. The attempt at a solution

    I think i got the first 3 parts right. Here's what i came up with.

    a. X = Na2CO3
    Y = KCl
    Z = MgSO4

    b. OH- + Mg+2 -> Mg(OH)2

    c. X has a PH greater than 7 because the its solution contains OH-
  2. jcsd
  3. May 15, 2007 #2


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    Answers look good except for 'c'. The answer is not false but is not the answer to the question asked. The presence of OH- must be backed up by more information, especially a reaction indicating where the OH- came from.
  4. May 16, 2007 #3
    I got it figured out already. Thanks anyway. Please close this thread if you don't mind :)
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