O LevelChemistryCambridge (CIE)Revision Notes7. Acids, Bases & Salts7.3 Preparation of SaltsSolubility Rules

Solubility Rules (Cambridge (CIE) O Level Chemistry): Revision Note

Exam code: 5070

Updated on 12 October 2026

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, ammonium and calcium (calcium hydroxide is only partially soluble)	Most are insoluble

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