Jun '15
14
MCAT Question of the Day | MCAT Course


  • Q:

    The molecule below has two sites for deprotonation, with corresponding pka values of approximately -6 and 0. Which of the following correctly describes the state of this molecule when dissolved in pH buffers of 10 and 5?



     

    A

    For both buffers, both nitrogen sites will remain protonated

    B

    For both buffers, both nitrogen sites will be deprotonated

    C

    For both buffers, the nitrogen site with the lower pka will be deprotonated, and the other will not

    D

    For both buffers, the nitrogen site with the higher pka will be deprotonated, and the other will not




    Tags: Acid/Base Equilibria | Suggest a tag
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