MCAT Question of the Day
    •

    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



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