What you'll learn
Reactions of acids and bases.
Key ideas
- pH scale; neutralisation (acid + base → salt + water).
- Metal + acid → salt + hydrogen; carbonate + acid → salt + water + CO₂.
Exam tips
- Learn the products of acid reactions.
- Litmus: red in acid, blue in alkali.
Common mistakes
- Confusing acids and alkalis.
- Not balancing equations.