Question

The amino acid phenylalanine has a pKa of 1.83 whereas tryptophan has a pKa of 2.83. Explain why phenylalanine is the stronger acid. Hint: Consider the charge in water at pH 7.4. (4 points) phenylalanine tryptophan Circle the most acidic proton in the chemical structures below (2 points each).

          The amino acid phenylalanine has a pKa of 1.83 whereas tryptophan has a pKa of 2.83. Explain why phenylalanine is the stronger acid. Hint: Consider the charge in water at pH 7.4. (4 points)
phenylalanine
tryptophan
Circle the most acidic proton in the chemical structures below (2 points each).

The amino acid phenylalanine has a pKa of 1.83 whereas tryptophan has a pKa of 2.83. Explain why phenylalanine is the stronger acid. Hint: Consider the charge in water at pH 7.4. (4 points)
phenylalanine
tryptophan
Circle the most acidic proton in the chemical structures below (2 points each).

Added by Dana B.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Dinesh Singh

01/29/2022

Step 1

83, which means it will readily donate a proton in water at pH 7.4. Tryptophan, on the other hand, has a pKa of 2.83, indicating that it is less likely to donate a proton compared to phenylalanine. Show more…

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The amino acid phenylalanine has a pKa of 1.83 whereas tryptophan has a pKa of 2.83. Explain why phenylalanine is the stronger acid. Hint: Consider the charge in water at pH 7.4. (4 points) phenylalanine tryptophan Circle the most acidic proton in the chemical structures below (2 points each).