C3 - Analysis

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Testing for Positive Ions

  • To identify unknown substances we have a variety of different tests which can help us distinguish one substance from another.
  • Flame Tests : Identifying some of the metals in Group 1 and 2 of the Periodic Table is made easier because most of them make flames with a characteristic colour. 
  • How to do a flame test : 
  • Put a small amount of the compound to be tested in a platinum wire loop which has been dipped in concentrated HCL.
  • Hold the loop in the naked flame of the bunsen burner.
  • Use the…


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