Solubility Rules (Cambridge International IGCSE Chemistry)
Exam board Cambridge International · IGCSEUpdated 2026-03-07
Spec point —
7.2.3· Describe the general solubility rules for salts: sodium, potassium and ammonium salts are soluble nitrates are soluble chlorides are soluble, except lead and silver sulfates are soluble, except barium, calcium and lead
carbonates are insoluble, except sodium, potassium and ammonium
hydroxides are insoluble, except sodium, potassium, ammonium and calcium (partially)
Solubility rules
- Salts are prepared by different methods, depending on whether the salt is soluble or insoluble so it is important to know the solubility of salts
Solubility of the common salts
| Salts | Soluble | Insoluble |
|---|---|---|
| Sodium, potassium and ammonium | All | None |
| Nitrates | All | None |
| Chlorides | Most are soluble | Silver and lead(II) |
| Sulfates | Most are soluble | Barium, calcium and lead(II) |
| Carbonates | Carbonates of sodium, potassium and ammonium | Most are insoluble |
| Hydroxides | Hydroxides of sodium, potassium and ammonium (calcium hydroxide is sparingly soluble) | Most are insoluble |
Was this revision note helpful?
Build on this topic