Chapter 22, Problem 34R

To determine

To Choose: The correct option.

Answer to Problem 34R

Option C

Explanation of Solution

Introduction:

In the process of titration an acid-base neutralization occurs.

The process of completely reacting a solution of known concentration with a solution of unknown concentration is known as titration.

The solution of known concentration is termed as standard solution.

If the solution of whose concentration is to be determined is a base, the standard solution used is an acid. If the solution of concentration whose concentration is to be determined is an acid, then the standard solution used is a base.

Since the solution of unknown concentration is oxalic acid, a standard base solution is to be used. Of the options given, only $\text{NaOH}$ is base and the rest are salts ( ${\text{Ca(NO}}_3{)}_2$ and ${\text{NH}}_4\text{Cl}$ ) and acid ( $\text{HBr}$ ).

Therefore, $\text{NaOH}$ is to be used to titrate an oxalic acid solution.

Conclusion:

Option C. $\text{NaOH}$ is to be used to titrate an oxalic acid solution.