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

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

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

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

4. When the flame is GREEN, you're testing:

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

5. What colour is the precipitate of [Copper(II)] ?

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