C3 - Analysing Substances - Cation tests

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1. Which 3 cations produce white precipitates when NaOH is added?

  • Aluminium,Calcium,Magnesium
  • Iron, Magnesium, Aluminium
  • Calcium, Aluminium, Copper
  • Iron, Copper,Calcium
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2. How is a flame test carried out?

  • Heat and dip a nichrome wire in HCL, then dip it in the compound and place in the flam
  • Heat the powdered compound in an evaporating dish on top of the flame
  • Heat a solution of the compound in a beaker

3. Which metal would produce a brick red flame?

  • Calcium
  • Barium
  • Lithium
  • Potassium

4. Which metal would produce a yellow flame?

  • Sodium
  • Lithium
  • Potassium
  • Calcium

5. Which of those precipitates dissolves in excess Sodium hydroxide?

  • Aluminium
  • Calcium
  • Magnesium

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