Chapter 15.3, Problem 15.2SC

Interpretation Introduction

Interpretation:

The mass of water added in $425\text{g}$ of formaldehyde to prepare $40.0\text{\%}$ (by mass) solution is to be calculated.

Concept Introduction:

The mass percentage of a compound present in a solution is calculated by dividing the mass of the compound present in the mixture by the total mass of the solution and then multiplying it by $100$. The formula for mass percentage is represented as:

$\text{mass}\text{\%}=\frac{\text{M}}{{\text{M}}_{\text{t}}}\times 100\text{\%}$

Where,

• $\text{M}$ represents the mass of the compound present in the solution.
• ${\text{M}}_{\text{t}}$ represents the total mass of solution.