4.2.4 flame tests

• Potassium produces a lilac flame when burnt
• Copper produces a green flame when burnt
• Calcium produces a orange-red flame when burnt
• Sodium produces a yellow flame when burnt
• Lithium produces a crimson flame when burnt
• Fill the gaps

  A) green

  B) orange

  C) potassium

  D) crimson

  
• We can use flame tests to identify the metal ions in an ionic compound.

  1. Submerge a nichrome wire loop in dilute hydrochloric acid to make sure that it is clean.
  2. Place the nichrome wire loop into the sample to be tested.
  3. Hold the nichrome wire loop in a Bunsen burner's blue flame.
  4. Observe any change in colour of the Bunsen flame.