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Titration Curves

Discussion in 'MCAT: Medical College Admissions Test' started by ASDIC, Mar 14, 2004.

  1. ASDIC

    ASDIC The 9th Flotilla
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    hi,

    I was reading something on the titration curves of acids and bases. But I came across a concept that said that multiprotic acids will show peaks in the tiration curve each corresponding to the acidic protons in the acid.

    Can someone explain why this happens? I know that it has something to do with where the protonated and deprotonated forms of the acid are in equilibrium...but I dont understand how it fits in.

    thanks
     
  2. bgreet

    bgreet Dopefish Lives!
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    I think they are just describing that multiprotic acids have more than one pka level point in a titration curve, one for each one normal.
     
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  3. DoctorInSpace

    DoctorInSpace Senior Member
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    Basically, if there are several hydrogens to be pulled off, each one will require a certain amount of pull, namely pKa, or amount of base added when titrating. The first H comes off rather quickly/easily, with little base added. The second H requires more base, and the third H requires still more base. So, for a multiprotic acid, the titration curve looks like three curves in one (or 2 in one for diprotic).

    I hope this and the post prior to mine helped.
     
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