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Chemistry

Percentage Composition and Empirical Formulae

Describing Percentage Composition and Empirical Formulae

This post will introduce the relationship between moles, percentage composition and empirical formulae for Prelim Chemistry.

Topic: Mole Concept

  • Explore the concept of the mole and relate this to Avogadro’s constant to describe, calculate and manipulate masses, chemical amounts and numbers of particles in:
    • Percentage composition calculations and empirical formulae

 

Percent Composition and Empirical Formulae Introduction

Recall percentage composition from module 1, a description of what makes up a compound or mixture in percentages although in this topic we’ll focus more on compound percent composition. The empirical formula of a compound is the lowest ratio of elements in that compound. This video will go through a bit more on percent composition and empirical formulae.

 

Percent Composition By Mass

This video will go through relating percent composition to mass.

 

Empirical Formula Manipulation

This video will go through empirical formulae in greater detail and compare it with molecular formulae.

 

This video will take you through calculating empirical formulae.