Chemistry 0620 · IGCSE · Physical and chemical changes

Physical and chemical changes — practice question

When a student heats hydrated copper(II) sulfate, the blue crystals turn into a white powder. What should the student do to change it back?

  • AAdd anhydrous copper(II) sulfate to the white powder.
  • BAdd water to the white powder.
  • CCool the white powder.
  • DReheat the white powder.

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