Investigating for Cations and Anions.

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Hamza Abib


GNVQ Science

Investigation 1.1A
Investigating for Cations and Anions

In this experiment I will investigate what cations and anions are present in various compounds. This will include carrying out a qualitative analysis, because I need to find out what type of cations and anions are there and not quantitative analysis, which includes finding out how much of each element there is.

Safety Points:

  • Wear glasses
  • Wear gloves
  • Do not mix more than two solutions
  • Only mix the solutions listed by the teacher
  • Handle the chemicals with extreme care
  • Put the chemical solutions into a test-tube which is resting on a test-tube holder
  • Follow school lab safety procedures.


  • Various chemicals.
  • Test tubes.
  • Boiling tubes.
  • Pipettes.
  • Test tube holder.
  • Bench mat.


  • I first copied the chemical solutions listed.
  • I put on some gloves and safety glasses.
  • I got a test-tube holder and placed five test-tubes in it.


  • I added the test solutions Copper Chloride to the test-tube.
  • To this I added a few drops of Sodium Hydroxide solution.
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After the few drops a pale blue precipitate of Copper  Hydroxide appeared that indicated the presence of Cu  ions.

  • I then added the test solution Iron Chloride to the second test-tube.
  • To this I added a few drops of Sodium Hydroxide.
  • After that a brown precipitate of Iron  Hydroxide appeared that indicated the presence of Fe  ions.
  • To the 3rd test-tube, I added the solution Sodium Hydrogen Carbonate and added Dilute Sodium Hydroxide.
  • I quickly covered the test-tube with a delivery tube and put the end of it into another test-tube with limewater.
  • The limewater turned a cloudy/milky ...

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