Chapter 8, Problem 8.19QP

Interpretation Introduction

Interpretation:

The empirical formula for Lactic acid should be identified when the combustion of given $\text{10 g}$ of sample produces $\text{6g}$ of ${\text{H}}_{\text{2}}\text{O}$ and $\text{14}\text{.7g}$ of ${\text{CO}}_{\text{2}}$.

Concept Introduction:

• Combustion of hydrocarbon produces ${\text{CO}}_{\text{2}}$ and ${\text{H}}_{\text{2}}\text{O}$.
• Combustion is the process of burning a compound in presence of excess of oxygen.
• Empirical formula of a compound represents the smallest whole number relative ratio of elements in that compound.
• Number of moles of a substance, from its given mass is,

$\text{Number of moles}\text{=}\frac{\text{Given}\text{mass}}{\text{Molecular}\text{mass}}$