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: Ã · Wear glasses Ã · Wear gloves Ã · Do not mix more than two solutions Ã · Only mix the solutions listed by the teacher Ã · Handle the chemicals with extreme care Ã · Put the chemical solutions into a test-tube which is resting on a test-tube holder Ã · Follow school lab safety procedures. Materials: Ã · Various chemicals. Ã · Test tubes. Ã · Boiling tubes. Ã · Pipettes. Ã · Test tube holder. Ã · Bench mat. Method Ã · I first copied the chemical solutions listed. Ã · I put on some gloves and safety glasses. Ã · I got a test-tube holder and placed five test-tubes in it. Cations Ã · I added the test solutions Copper Chloride to the test-tube. Ã · 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. Ã · I then added the test solution Iron Chloride to the second test-tube. Ã · To this I added a few drops of Sodium Hydroxide. Ã · After that a brown precipitate of Iron Hydroxide appeared that indicated the presence of Fe ions. Ã · To the 3rd test-tube, I added the solution Sodium Hydrogen Carbonate and added Dilute Sodium Hydroxide. Ã · I quickly covered the test-tube with a delivery tube and put the end of it into another test-tube with limewater. Ã · The limewater turned a cloudy/milky colour which indicated that there was CO present. Anions Ã · In the 4th test-tube, I poured the solution Copper Chloride into the test-tube.