There are a number of ways that you could make copper sulfate crystals in Chemistry. This is an outline of the required steps to undertake one of these methods.
To investigate the preparation of pure, dry hydrated copper sulfate crystals starting from copper oxide.
Record the appearance of the copper sulfate crystals, including their colour and shape.
Hydrated copper sulfate crystals should be blue and regularly shaped. Describe how your crystals compare to this description. Suggest an explanation for any differences.
Explain why the sulfuric acid is warmed in a water bath in step 1.
Warm acid will react faster than cold acid, helping to make sure that all the acid reacts with the copper oxide.
It is important in this practical activity to use appropriate apparatus and methods. This includes the safe use and careful handling of substances and equipment.
Evaluate the hazards and the precautions needed to reduce the risk of harm. For example:
|Sulfuric acid||Concentrated acid is corrosive and damages skin and clothes||Use dilute sulfuric acid|
|Boiling water bath||Skin burns||Ensure the boiling water bath is stable|
|Hot copper sulfate solution spitting out during crystallisation||Damage to eyes and skin||Wear eye protection and avoid standing over the hot apparatus|