The Four Types of Acid Reactions
Part of Neutralisation Reactions — GCSE Chemistry
This how it works covers The Four Types of Acid Reactions within Neutralisation Reactions for GCSE Chemistry. Revise Neutralisation Reactions in Chemical Changes for GCSE Chemistry with 20 exam-style questions and 20 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 5 of 13 in this topic. Use this how it works to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 5 of 13
Practice
20 questions
Recall
20 flashcards
⚙️ The Four Types of Acid Reactions
1. Acid + Metal → Salt + Hydrogen
Mg + 2HCl → MgCl₂ + H₂
Fizzing/bubbles seen. Test: squeaky pop with lit splint.
2. Acid + Metal Oxide → Salt + Water
CuO + H₂SO₄ → CuSO₄ + H₂O
Black copper oxide dissolves to give blue solution.
3. Acid + Metal Hydroxide → Salt + Water
HCl + NaOH → NaCl + H₂O
Classic neutralisation — often no visible change.
4. Acid + Metal Carbonate → Salt + Water + CO₂
CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂
Fizzing/effervescence. Test CO₂: turns limewater cloudy.