Wednesday, October 2, 2019

Investigating for Cations and Anions :: Papers

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. Materials:  · Various chemicals.  · Test tubes.  · Boiling tubes.  · Pipettes.  · Test tube holder.  · Bench mat. Method  · 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. Cations  · I added the test solutions Copper Chloride to the test-tube.  · To this I added a few drops of Sodium Hydroxide solution. 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 colour which indicated that there was CO present. Anions  · In the 4th test-tube, I poured the solution Copper Chloride into the test-tube.

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