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2. What is another test that can be done for Cations?

  • Adding Barium chloride and dilute HCL
  • Adding silver nitrate ( int he presence of dilute nitric acid)
  • Adding Sodium Hydroxide
  • reacting with a dilute acid

3. Which metal would produce a green flame?

  • Sodium
  • Lithium
  • Barium
  • Calcium

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

  • Aluminium,Calcium,Magnesium
  • Iron, Copper,Calcium
  • Iron, Magnesium, Aluminium
  • Calcium, Aluminium, Copper

5. Why aren't flame tests used to test all cations?

  • Many only produce white flames, or similar coloured flames
  • The heat of the flame isn't high enough to react with all of them
  • Some react too violently with the flame
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