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Homework Help: Amino Acid Titration

  1. Sep 21, 2010 #1
    1. The problem statement, all variables and given/known data
    Lets say we titrate an amino acid with a strong base (NaOH), like I know that the hydrogen of the carboxyl (COOH) group will be pulled away followed by the amino group (NH3+), but is there a particular reason why the hydrogen on the carboxyl group is pulled out first rather than the amino acid? Does it have to do with the repulsion caused by the NH3+ group that causes the carboxyl hydrogen to come off first?
    Thanks.


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 21, 2010 #2

    Borek

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    Staff: Mentor

    Which is usually a stronger acid - -COOH, or -NH3+?
     
  4. Sep 21, 2010 #3
    Is COOH the stronger acid? but then NH3+ is a weak acid? (i somehow thought that NH3+ acts as a base...)
     
  5. Sep 21, 2010 #4

    Borek

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    Staff: Mentor

    -NH2 is a base, -NH3+ is a conjugate acid.

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