Chapter 3, Problem 3.52AP

Interpretation Introduction

(a)

Interpretation:

The structure of ascorbic acid as it exists at the physiological $\text{pH}$ ($\text{pH }=7.4$) is to be stated.

Concept introduction:

The $\text{p}{K}_{\text{a}}$ of the acid describes the $\text{pH}$ at which the acid will be found in the protonated form or dissociated form. The acid is found in dissociated form in the $\text{pH}$ range equal to $\text{p}{K}_{\text{a}}-1$ to $\text{p}{K}_{\text{a}}+1$.

Interpretation Introduction

(b)

Interpretation:

The resonance structures of the structure of ascorbic acid as it exists at the physiological $\text{pH}$ ($\text{pH }=7.4$) using curved-arrow notation are to be stated.

Concept introduction:

Resonance is the phenomena of the delocalization of pi electrons to give extra stability to the molecule. This extra stability comes from the distribution of the energy of the molecule in the resonance structures formed.