Page 25 - Ranger SPM 2022 Chemistry

Chemistry SPM Chapter 2 Carbon Compound

Bromine water, Br in
2
Filter paper 1,1,1-trichloroethane,
CH CCl
3 3
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Evaporating Hexane, C H 14
6
dish
Hexane, C H 14 Hexene, C H 12
6
6
Diagram 2.5 Diagram 2.6
(C) Reaction with acidified potassium
2. A lighted wooden splinter is brought
close to the evaporating dish to ignite manganate(VII) solution, KMnO 4
hexane. Aim:
To study the comparison of the reaction
3. A piece of filter paper is placed above using acidified potassium manganate(VII)
the flame when hexane burns. solution between alkane and alkene.
4. The colour and sootiness of the flame Hypothesis:
are observed and recorded. Hexane does not decolourise the purple
colour of acidified potassium manganate(VII)
5. Steps 1 – 4 are repeated with hexene.
solution while hexene decolourise the purple
colour of acidified potassium manganate(VII)
(B) Reaction with bromine water solution.
Aim:
To study the comparison of the reaction with Variables:
bromine water between alkane and alkene. (a) Manipulated: Hexane and hexene
(b) Responding: Colour change of acidified
Hypothesis: potassium manganate(VII) solution
Hexane does not decolourise the brown (c) Fixed: Volume of hexane and hexene,
colour of bromine water while hexene volume and concentration of acidified
decolourises the brown colour of bromine potassium manganate(VII) solution.
water. Procedure:
3
Pemboleh ubah: 1. 2 cm hexane is poured into a test tube.
(a) Manipulated: Hexane and hexene 2. Two drops of acidified potassium
(b) Responding: Colour change of bromine manganate(VII) solution are added into
water the test tube.
(c) Fixed: Volume of hexane and hexene, 3. The mixture is shaken and the colour
volume and concentration of bromine change of the solution is observed.
water 4. The observation is recorded.
Form 5
Procedure: 5. Steps 1 – 4 are repeated with hexene.
1. 2 cm of hexane is poured into a test
3
tube. Acidified potassium
2. Two drops of bromine water in manganate(VII)
1,1,1-trichloroethane are added into the solution, KMnO 4
test tube.
3. The mixture is shaken and the colour Hexane, C H
change of the solution is observed. 6 14
4. Observation is recorded.
5. Steps 1 – 4 are repeated with hexene. Diagram 2.7

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02.5 RANGER SPM CHEMISTRY 2P.indd 154 29/03/2022 2:28 PM