Testing for ions

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  • Created by: Chloe
  • Created on: 14-06-16 12:35

1. What steps are involved in the carbonate test?

  • Add dilute acid. It should produce CO2. To check it should form a white precipitate with limewater, shows CO2 has formed.
  • Add strong acid. Should produce CO2. Check by bubbling through limewater
  • Add dilute alkali.It should produce CO2. To check it should form a white precipitate with limewater, shows CO2 has formed.
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2. What colour does copper produce in hydroxide test?

  • Crimson
  • Black
  • Blue
  • Purple

3. What colour does potassium produce in flame test?

  • Red
  • Green
  • Lilac
  • Purple

4. What steps are involved in the sulphate test?

  • Add sulphuric acid then barium chloride. If white precipitate forms, sulphate ions were present.
  • Red precipitate forms
  • Add sulphur dioxide, white precipitate should form

5. What colour does lithium produce in flame test?

  • Crimson
  • Blue
  • Purple
  • Lilac

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