Chapter 14, Problem 57QAP

(a)

Interpretation Introduction

Interpretation:

The molar mass of Uric acid needs to be determined which is prepared using 4.00 g and titrated with 0.73 M KOH solution for which 32.62 mL was consumed to reach the equivalence point at pH of 4.12.

Concept Introduction :

Titration is done between one known and another unknown concentration of the substance to determine the qualitative information of the unknown. The analyte or titrant is the solution of unknown molarity and titrant is the known concentration of the solution that reacts with analyte. Usually, an indicator is added to indicate the endpoint of the equivalence point.

(b)

Interpretation Introduction

Interpretation:

The value of K_a of Uric acid needs to be determined.

Concept Introduction :

The acid-base indicators are weak acids and bases and it changes color when there is a change in pH. It is used to indicate the degree of acidity or basicity. At a pH, indicators font change color but works within a specific range of pH.