Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Question
Chapter 2.8, Problem 12P
Interpretation Introduction
Interpretation:
The amino acid phenyl alanine has pKa=1.83 and tryptophane has pKa=2.83. The stronger acid among them is to be identified.
Concept introduction:
Acid strengths are normally expressed using pKa values which is defined as negative commom logarithm of the Ka values.
pKa=-logKa
A stronger acid has a smaller pKa and a weaker acid has a larger pKa value.
To determine:
The strong acid among phenyl alanine with pKa=1.83 and tryptophane with pKa=2.83.
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