Chapter 1.4, Problem 9TY

Interpretation Introduction

Interpretation:

The mass of $3.0{\text{ \% wt H}}_2{\text{O}}_2$ required to provide $25\%$ excess reagent for the reaction of hydrogen peroxide with iron tablets given below has to be calculated.

$\begin{array}{l}2F{e}^{2+}{\text{ + H}}_2{\text{O}}_2{\text{ + 2H}}^{+}\stackrel{}{\to }{\text{ 2Fe}}^{3+}\text{ + }{H}_{2}O\\ Iron(II)\text{ hydrogen peroxide }Iron(III)\end{array}$

Concept introduction:

Mass percent is one of parameters used to express concentration of a solution.  It is expressed as,

$\text{Mass percent of a solute = }\frac{mass\text{ of solute}}{mass\text{ of solution}}\times \text{ 100\%}$