Chapter 11, Problem 52QP

Interpretation Introduction

Interpretation:

The amount of ${\text{Na}}_3{\text{PO}}_4$ required to prepare $255\text{g}$ of a solution having $20.0\%$ ${\text{Na}}_3{\text{PO}}_4$ by mass is to be determined.

Concept Introduction:

${\text{Na}}_3{\text{PO}}_4$ is an ionic compound and triphosphate of phosphoric acid and water is a polar solvent. Thus ${\text{Na}}_3{\text{PO}}_4$ is easily soluble in water to give solution by ion-dipole force between them. The percent-by-mass is calculated by dividing the solute mass by the mass of solution and multiplying by $100\%$ .