Chapter 16.3, Problem 4RQ

Interpretation Introduction

Interpretation: The volume of NaOH solution in the titration is to be determined.

Concept Introduction:The molarity of a solution containing a fixed amount of solute is inversely proportional to its volume. This is known as dilution principle.

Answer to Problem 4RQ

The required volume of NaOH solution for the titration is 75.0 mL.

Explanation of Solution

The molarity of HCL solution M₁ is 0.15 M .

The volumeof HCL solutionV₁ is 125. 0mL .

The molarity of KOH solution M₂ is 0.25 M .

The volume of KOH solution V₂is calculated below:

According to dilution principle,

  $\begin{array}{c}{M}_1{V}_1=M_2{V}_2\\ 0.15\times 125=0.25\times V_2\\ V_2=\frac{0.15\times 125}{0.25}\\ V_2=75.0mL\end{array}$