MCAT Question of the Day
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    Q:

    		 The molecule below has a pKa greater than 40. If a neutral nitrogen replaces the carbon at the fourth position on the ring, what will happen to the pKa and why?



    		 

    A

    		 The pKa will increase because the introduction of the nitrogen atom eliminates any resonance

    B

    		 The pKa will increase because once the molecule is deprotonated, the negative charge can be stabilized by the more electronegative nitrogen atom

    C

    		 The pKa will decrease because the introduction of the nitrogen atom eliminates any resonance

    D

    		 The pKa will decrease because once the molecule is deprotonated, the negative charge can be stabilized by the more electronegative nitrogen atom



    Acid/Base Equilibria | Molecular Structure |
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