Organic Chemistry Practice Problems pKa Practice Problems Solution: Which statement regarding the two amino acids (phe...

Solution: Which statement regarding the two amino acids (phenylalanine & tryptophan) below is true? A) tryptophan is a stronger acid than phenylalanine as it has a larger pKa B) tryptophan is a weaker acid than phenylalanine as it has a larger pKa C) phenylalanine is a stronger acid than tryptophan as it has a smaller pKa D) phenylalanine is a weaker acid than tryptophan as it has a smaller pKa E) B) and C) are both true 

Problem

Which statement regarding the two amino acids (phenylalanine & tryptophan) below is true?

A) tryptophan is a stronger acid than phenylalanine as it has a larger pKa

B) tryptophan is a weaker acid than phenylalanine as it has a larger pKa

C) phenylalanine is a stronger acid than tryptophan as it has a smaller pKa

D) phenylalanine is a weaker acid than tryptophan as it has a smaller pKa

E) B) and C) are both true