MCAT Question of the Day
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    Q:

    		 The pKa of aniline, or C6H5NH2 is 4.60 while the pKa of benzylamine, or C6H5CH2NH2 is 9.34. Which of the following best explains the disparity in their pKa values?
    		 

    A

    		 The larger size of benzylamine increases its pKa.

    B

    		 The CH2 group has electron-donating properties and separates the amine from the electron-withdrawing benzene ring.

    C

    		 The CH2 group adds electron-withdrawing characteristics to raise the pKa.

    D

    		 The difference in steric hindrance between the two is sufficient to explain the difference in pKa.



    Acid/Base Equilibria |
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