Chapter 3, Problem 157AE

Interpretation Introduction

Interpretation: A sample of iron ore containing ${\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}$ and other impurities is given. The mass percent of ${\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}$ in the impure iron ore sample is to be calculated.

Concept introduction: The mass percent of a substance in the original mixture is calculated by the formula,

$\text{Percent}\text{mass}=\frac{\text{Mass}\text{of}\text{the}\text{substance}}{\text{Mass}\text{of}\text{the}\text{original}\text{mixture}}\times 100$

To determine: The mass percent of ${\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}$ in the impure iron ore sample.