Chapter 21, Problem 21.31P

(a)

Interpretation Introduction

Interpretation:

The unknown volume at the equivalent pointof the solution has to be determined when $\text{0}{\text{.100M NaOH}}_{\left(\text{aq}\right)}$ is added to $\text{50mL of 0}{\text{.200 M HBr}}_{\left(\text{aq}\right)}.$

Concept Introduction:

In the quantitative analysis the unknown concentration can be calculated using volumetric principle

  $\begin{array}{l}{\text{M}}_{\text{1}}{\text{V}}_{\text{1}}{\text{=M}}_{\text{2}}{\text{V}}_{\text{2}}\\ \\ \text{M=molarity}\\ \\ \text{V=volume}\end{array}$

 (b)

Interpretation Introduction

Interpretation:

The unknown volume at the equivalent point of the solution has to be determined when $\text{0}{\text{.100M NaOH}}_{\left(\text{aq}\right)}$ is added to $\text{30mL of 0}{\text{.150 M HNO}}_{\text{3}}{}_{\left(\text{aq}\right)}.$

Concept Introduction:

Refer part (a).