Specification Point 2.42:
Practical: Prepare a sample of pure, dry hydrated Copper (II) Sulfate Crystals starting from Copper (II) Oxide
Preparation of Pure, Dry Hydrated Copper (II) Sulfate Crystals
The heating of the mixture to leave a saturated solution
Acid = Dilute Sulfuric Acid Insoluble Base = Copper (II) Oxide
- Add dilute sulfuric acid into a beaker and heat using a bunsen burner flame
- Add copper (II) oxide (insoluble base), a little at a time to the warm dilute sulfuric acid and stir until the copper (II) oxide is in excess (stops disappearing)
- Filter the mixture into an evaporating basin to remove the excess copper (II) oxide
- Leave the filtrate in a warm place to dry and crystallize
- Decant excess solution
- Blot crystals dry
Equation Of Reaction:
|Copper (II) Oxide + Dilute Sulfuric Acid → Copper (II) Sulphate + Water |
CuO (s) H2SO4 (aq) CuSO4 (s) H2O (l)
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