Exercise 1 — IGCSE 0654 May/June 2025 Paper 22 Q24
Show answer
Correct answer: D
Cambridge IGCSE·Co-ordinated Sciences 0654·Chemistry
Preparation Of Salts
Key knowledge — Acids Bases Salts
Formulas & equations
acid + metal → salt + hydrogenacid + metal oxide → salt + wateracid + metal hydroxide → salt + water (neutralisation)acid + metal carbonate → salt + water + carbon dioxide
Key facts & rules
- Acid: produces H⁺ ions in solution. pH < 7.
- Alkali: produces OH⁻ ions in solution. pH > 7. (Bases that dissolve in water.)
- Neutralisation: H⁺ + OH⁻ → H₂O.
- pH scale: 0–14. pH 7 = neutral. Strong acids have lower pH than weak acids at same concentration.
- Strong acid: fully dissociates (HCl, H₂SO₄, HNO₃). Weak acid: partially dissociates (CH₃COOH).
- Making insoluble salts: mix two solutions containing the required ions → filter the precipitate.
- Making soluble salts: add excess solid acid/metal/metal carbonate to acid → filter → evaporate.
- Titration: used to find exact volume of acid/alkali needed for neutralisation.
IGCSE Chemistry — Preparation of salts
2 Cambridge IGCSE 0654 questions on preparation of salts, across all three components.
About preparation of salts on IGCSE 0654
Every Cambridge IGCSE Co-ordinated Sciences 0654 question on preparation of salts (Acids, bases & salts, Chemistry), across all three exam components. Theory and alternative-to-practical come with full mark schemes; multiple choice is interactive — click an option to check it.
Multiple choice
Preparation of salts — Extended multiple choice questions2 total · Paper 2
Exercise 2 — IGCSE 0654 May/June 2023 Paper 23 Q20
Show answer
Correct answer: C