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6. What is unique about aluminium?

  • Nothing
  • If you add excess sodium hydroxide, the precipitate will dissolve again
  • It turns blue
  • It turns grey

7. What steps are involved in the halide test?

  • Add dilute nitric acid, add silver nitrate solution. Forms a precipitate
  • Add dilute hydrochloric acid, add silver nitrate. Forms a precipitate.
  • Add dilute nitric acid, add barium chloride solution. Forms a precipitate

8. What steps are involved in the sulphate test?

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

9. What colour does barium produce in flame test?

  • Black
  • Brown
  • Green
  • Blue

10. What three tests can you use to check for negative ions?

  • Sulfate, halide and flame
  • Carbonate, Hallide and Sulfate Tests
  • Hydroxide, carbonate and sulfate

11. What colour does lithium produce in flame test?

  • Lilac
  • Blue
  • Crimson
  • Purple

12. What colour do chloride ions produce?

  • Cream
  • White
  • Yellow

13. What colour does copper produce in hydroxide test?

  • Crimson
  • Blue
  • Purple
  • Black

14. White colour do bromide ions produce?

  • White
  • Cream
  • Yellow

15. What 3 methods of flame testing can you use?

  • Soak, spray, evaporate once dissolved in solution
  • Spray, soak splint and use a loop of wire
  • Burn, spray, soak

16. What colour does potassium produce in flame test?

  • Purple
  • Lilac
  • Green
  • Red

17. What steps are involved in the carbonate test?

  • Add dilute alkali.It should produce CO2. To check it should form a white precipitate with limewater, shows CO2 has formed.
  • 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

18. What colour do iodine ions produce?

  • White
  • Yellow
  • Cream

19. What colour does iron III produce in hydroxide test?

  • Brown
  • Blue
  • Purple
  • Black

20. What colour does sodium produce in flame test?

  • Red
  • Crimson
  • Orange
  • Yellow