Chapter 16, Problem 101E

Interpretation Introduction

Interpretation: The mass percent of ${\text{H}}_2{\text{O}}_2$ in the commercial hydrogen peroxide solution is to be calculated.

Concept Introduction: In balanced redox reaction, each of the atom on both sides of reactions is equal.

Relation between density $\left(d\right)$ and volume $\left(V\right)$ is:

$d=\frac{m}{V}$

Here, $m$ is mass.

The expression of mass percent in terms of mass solution is:

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

In this solution, first the given equation is balanced and then, with the help of a balance chemical equation, the no. of moles of hydrogen peroxide that reacts with potassium permanganate are to be calculated by applying stoichiometric mole-mole relationships that can be obtained from the balanced chemical equation. The calculated moles are converted into their corresponding mass by the use of molar mass as a conversion factor.