GCSE Chemistry Required Practical: Making Salt

Key Stage 4

Meaning

Produce a salt from a Neutralisation reaction between an acid and an insoluble base then separate the salt from the mixture to obtain a pure sample.

Method

1. Add roughly 40ml of 1.0M Sulphuric Acid to a 100ml beaker.
2. Heat the acid to 90°C.
3. Use a spatula to add a small amount of Copper (II) Oxide powder to the solution and stir with a glass rod.
4. Repeat step 3 each time the Copper (II) Oxide disappears until the some of the powder remains at the bottom despite stirring.
5. Allow to cool then pass the mixture through filter paper and a funnel into a conical flask to remove the Copper (II) Oxide residue, leaving only the solution in the conical flask.
6. Pour the solution into an evaporating dish and heat gently to evaporate the water from solution. This will leave pure Copper Sulphate crystals.