RP6 - Organic tests

Question 1

How do you test for an alkene?

Answer 1

● Add bromine water to the sample.

● If an alkene is present, the bromine water will decolourise.

Question 2

How do you test for a haloalkane?

Answer 2

1. Add 5 drops of haloalkane to about 1 cm3 of NaOH solution in a test tube.
2. Warm the contents of the test tube at 60℃ for a few minutes.
3. Then add 2 cm3 of dilute nitric acid
4. Add about 1 cm3 of silver nitrate solution.
5. If a haloalkane is present, a precipitate should form. The colour of the precipitate formed depends on the halide ion present in
   solution.
   White = Chloride ions, Cream = Bromide ions, Yellow = Iodide ions.

Question 3

What are some common potential hazards and risks

in the laboratory?

Answer 3

Bunsen burner: Burns =keep away from flammable chemicals and away from the edge of the desk.
Chemicals: May be an irritant or corrosive, causing irritation to skin, eyes, lungs, May be toxic =
Handle with care and while
wearing gloves. Wear eye
protection. Keep away from the edge of the desk and open flame.