ChemistryCode 5070
Preparation of salts
What this topic asks you to be able to do
- Describe how a soluble salt is prepared, separated and purified when an acid reacts with: (a) an alkali, using titration (b) an excess of metal (c) an excess of insoluble base (d) an excess of insoluble carbonate
- Describe how an insoluble salt is made by precipitation
- Describe the general rule on the solubility of salts: (a) all sodium, potassium and ammonium salts are soluble (b) all nitrates are soluble (c) all chlorides except lead and silver chloride are soluble (d) all sulfates except barium, calcium and lead sulfate are soluble (e) all carbonates except sodium, potassium and ammonium carbonate are insoluble (f) all hydroxides except sodium, potassium, ammonium and calcium hydroxide are insoluble, and calcium hydroxide is partially soluble
- Define hydrated and anhydrous substances: a hydrated substance has water chemically combined in it, while an anhydrous substance contains no water
- Define water of crystallisation: the molecules of water held within hydrated crystals, including CuSO4•5H2O and CoCl2•6H2O