1. Measure 20 cm3 sulfuric acid into a measuring cylinder and pour it into beaker
2. Heat the acid gently using a Bunsen burner
3. Add small amounts of insoluble base in this case copper oxide in excess (until no more reacts thus no more effervescence is produced)
4. Filter using filter paper and funnel the solution to remove the excess copper oxide
5. Pour the solution into the evaporating basin
6. Evaporate the solution using a water bath until crystals start to form
7. Leave the evaporating basin in a cool place for at least 24 hours
8. Gently pat the crystals dry between two pieces of filter paper
