1 x 1 hour lessons

This short module gives you the essential foundation for writing chemical formulae and balanced equations — skills you'll use throughout the course. You'll learn how to work out the formulae of ionic and covalent compounds from their names or constituent ions, and how to construct balanced chemical equations for a wide range of reactions.

We also introduce key definitions for acids, bases, and alkalis and show how to identify common acids and their ions. You'll practise writing ionic equations and identifying spectator ions — a crucial skill for redox, acid-base, and precipitation reactions.

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By the end of this module, you'll be able to:

• Write correct chemical formulae for covalent and ionic compounds

• Use charges on ions to construct formulae for compounds

• Construct and balance full chemical equations

• Write ionic equations and identify spectator ions

• Recognise common acids and their formulae