Tests For Positive Ions

AQA - C3 5.1 (Analysis Section)

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Flame Tests

  • Dip a platinum wire loop into concentrated hydrochloric acid to sterilise it
  • Dip it in the unknown substance
  • Put the loop into a roaring flame on a Bunsen Burner
  • See what colour there is... :)
  • (The reason for a platinum loop is that it is very non-reactive, so will not react with the substance being tested)
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Element                     Flame Colour

Lithium                       Bright red

Sodium                      Golden yellow

Potassium                  Lilac

Calcium                     Brick red

Barium                      Green

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