CH-27
Preparing salts
Chemistry · Secondary 3 · Medium · Preparing salts
A student adds excess copper(II) oxide to warm dilute sulfuric acid and filters the mixture to obtain a blue solution. She wants to obtain pure copper(II) sulfate crystals from this solution.
Which final step should she carry out?
Which final step should she carry out?
- Heat the solution to dryness over a strong flame.
- Cool the solution after partial evaporation to allow crystals to form.
- Add more copper(II) oxide until no more dissolves.
- Add sodium chloride to precipitate the crystals.
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