Chapter 16, Problem 16.100SP

Interpretation Introduction

(a)

Interpretation:

The percent dissociation of $\text{0}\text{.050 M HF }$ needs to be determined.

Concept introduction:

For a weak acid say HA, the percent dissociation is a ratio of concentration of dissociated $\text{HA}$ to initial amount of $\text{HA}$ multiplied by $100$.

By increasing the value of ${\text{K}}_{\text{a}}$, the value of percent dissociation will be also increase.

The strong acid completely dissociated in solution $\left(100\%\right)$.

The value of ${\text{K}}_{\text{a}}$ is large for strong acids. For weak acids the value of percent dissociation changes by changing the concentration value.

Interpretation Introduction

(b)

Interpretation:

The percent dissociation of $\text{0}\text{.50 M }$ $\text{HF}$ solution needs to be determined.

Concept introduction:

For a weak acid say HA, the percent dissociation is a ratio of concentration of dissociated $\text{HA}$ to initial amount of $\text{HA}$ multiplied by $100$.

By increasing the value of ${\text{K}}_{\text{a}}$, the value of percent dissociation will be also increase.

The strong acid completely dissociated in solution $\left(100\%\right)$.

The value of ${\text{K}}_{\text{a}}$ is large for strong acids. For weak acids the value of percent dissociation changes by changing the concentration value