Chapter 5, Problem 5E.2BE

(i)

Interpretation Introduction

Interpretation:

The point denoting $33\%$ by mass $\text{NaCl}$, $33\%$ of ${\text{Na}}_{\text{2}}{\text{SO}}_{\text{4}}\cdot {\text{10H}}_{\text{2}}\text{O}$ and the rest of the ${\text{H}}_{\text{2}}\text{O}$ for a system of ${\text{NaCl/Na}}_{\text{2}}{\text{SO}}_{\text{4}}\cdot {\text{10H}}_{\text{2}}{\text{O/H}}_{\text{2}}\text{O}$ has to be marked on triangular coordinates.

Concept introduction:

The ternary system is defined as the system having three components.  These components in a mixture on undergoing the phase changes represent a triangular phase diagram.  Thus, the three dimensional representation of the phase diagram is given for the ternary system.

(ii)

Interpretation Introduction

Interpretation:

The line denoting the same relative composition of the two salts but with changing amount of water has to be marked on triangular coordinates.

Concept introduction:

The ternary system is defined as the system having three components.  These components in a mixture on undergoing the phase changes represent a triangular phase diagram.  Thus, the three dimensional representation of the phase diagram is given for the ternary system.