Chemistry 0620 · 7 Acids, bases and salts
7.3 Preparation of salts
Describe preparation and purification of soluble and insoluble salts, outline general solubility rules, and define hydration and water of crystallisation.
- Questions
- 378
- Years
- 2010–2026
- Multiple choice
- 247
- Written answer
- 131
- Average marks
- 4.5
Practise acids, bases and salts questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 1variants 11, 12, 13142
- Paper 2variants 21, 22, 23118
- Paper 6variants 61, 62, 6344
- Paper 3variants 31, 32, 3334
- Paper 4variants 41, 42, 4328
- Paper 5variants 51, 52, 5312
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 5 | 14 | – | 19 |
| 2023 | 3 | 24 | 12 | 39 |
| 2022 | 2 | 24 | 21 | 47 |
| 2021 | 4 | 14 | 10 | 28 |
| 2020 | – | 19 | 14 | 33 |
| 2019 | 6 | 27 | 15 | 48 |
| 2018 | 3 | 16 | 11 | 30 |
| 2017 | 8 | 13 | 16 | 37 |
| 2016 | 3 | 11 | 14 | 28 |
| 2015 | 3 | 15 | 10 | 28 |
| 2014 | – | 5 | 4 | 9 |
| 2013 | – | 2 | 3 | 5 |
| 2012 | – | 5 | 9 | 14 |
| 2011 | – | 2 | 3 | 5 |
| 2010 | – | 4 | 4 | 8 |
