Chapter 14, Problem 132QRT

(a)

Interpretation Introduction

Interpretation:

Chemical equations showing the action of niacin as an acid in water have to be written.

Concept Introduction:

The structure of niacin is given below.

Niacin contains both a carboxylic acid functional group and an amine functional group.

(b)

Interpretation Introduction

Interpretation:

Chemical equations showing the action of niacin as a base in water have to be written.

(c)

Interpretation Introduction

Interpretation:

The value of $K_a$ of $0.020M$ aqueous solution of niacin having a $pH$ of $3.26$ has to be calculated.

(d)

Interpretation Introduction

Interpretation:

The value of $K_b$ of niacin has to be calculated.

(e)

Interpretation Introduction

Interpretation:

The chemical equation that accompanies the $K_b$ expression for niacin has to be written.