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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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Chapter 2 Solutions

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