Chapter 5, Problem 5E.5BE

(i)

Interpretation Introduction

Interpretation:

The effect of addition of ${\left({\text{NH}}_{\text{4}}\right)}_2{\text{SO}}_4$ to a solution of ${\text{NH}}_{\text{4}}\text{Cl}$ in water in the presence of excess ${\text{NH}}_{\text{4}}\text{Cl}$ has to be stated.

Concept introduction:

The phase diagram represents the changes in the mixture on changing the parameters like temperature and pressure of the mixture.  The phase diagram ensures that the property, $x_{\text{A}}+x_{\text{B}}+x_{\text{C}}=1$ is satisfied.

(ii)

Interpretation Introduction

Interpretation:

The effect of addition of water to a mixture of $25\text{g}$ of ${\text{NH}}_{\text{4}}\text{Cl}$ and $75\text{g}$ of ${\left({\text{NH}}_{\text{4}}\right)}_2{\text{SO}}_4$ has to be stated.

Concept introduction:

The phase diagram represents the changes in the mixture on changing the parameters like temperature and pressure of the mixture.  The phase diagram ensures that the property, $x_{\text{A}}+x_{\text{B}}+x_{\text{C}}=1$ is satisfied.