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Chemistry · May / June 2019 · Paper 11 · Question 22

5070Preparation of salts

What is the best method to prepare a pure sample of copper(II) sulfate?

  1. AAdd copper to aqueous zinc sulfate.
  2. BAdd copper to dilute sulfuric acid.
  3. CAdd copper(II) carbonate to aqueous sodium sulfate.
  4. DAdd copper(II) oxide to dilute sulfuric acid.

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Correct answer: D. Add copper(II) oxide to dilute sulfuric acid.

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