What you'll learn
How chemicals react and the energy changes involved.
Reactions
- Conservation of mass and balancing equations.
- Acids and bases, the pH scale, neutralisation (acid + base → salt + water).
- Metal + acid, and carbonate + acid reactions.
Energy
- Exothermic (release heat) vs endothermic (absorb heat) reactions.
Exam tips
- Balance equations by counting atoms on each side.
- Learn the products of the common acid reactions.
Common mistakes
- Not balancing equations.
- Confusing exothermic and endothermic.