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6. What colour is the precipitate of [Iron(III)] ?

  • White at first but then colourless
  • Green
  • Brown
  • White

7. When the flame is ORANGE-RED, you're testing:

  • Calcium ions
  • Copper ions
  • Lithium ions
  • Sodium ions

8. When the flame is PURPLE, you're testing:

  • Sodium ions
  • Copper ions
  • Potassium ions
  • Calcium ions

9. When the flame is YELLOW, you're testing:

  • Potassium ions
  • Calcium ions
  • Sodium ions
  • Copper ions

10. What colour is the precipitate of [Calcium] ?

  • Blue
  • White at first but then colourless.
  • White
  • Green

11. What colour is the precipitate of [Aluminium] ?

  • White
  • Blue
  • White at first but then colourless
  • Green