Page 5 - 1202 Question Bank Chemistry Form 5 KSSM

KNOW Important Diagrams

Electrolytic Cell The Vulcanisation Process of Natural Rubber

Battery
+ – C C C C
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e – e – C C C C S S
C C
S C
+ – C C
Anode Electrolyte Cathode C C C C C C C
Vulcanisation C C
S
S
– C C
Anion C C C S C
+ C
Anode Cation Cathode C
C C C S
• Attracts anions • Attracts cations C S
• Positive electrode • Negative electrode Natural C C C C
• Oxidation occurs • Reduction occurs rubber Vulcanised rubber
Important Diagrams (Chapter 1) 49 @ Pan Asia Publications Sdn. Bhd. Important Diagrams (Chapter 4) 55 @ Pan Asia Publications Sdn. Bhd.

Apparatus Set up for Dehydration of Ethanol Preparation of Detergents

Heat the porcelain chips first before heating the glass wool soaked Step 1
in ethanol gently.
Sulphonation
Alkyl benzene
Concentrated
Alkylbenzene + sulphonic acid +
Porcelain chips H SO
2 4 water
Combustion Ethene gas
tube
Step 2
Glass wool
Glass wool Heat
soaked in
soaked in Neutralisation
propanol
ethanol
Water Alkyl Sodium alkyl
benzene benzene
+ NaOH
sulphonic sulphonate +
acid water
Important Diagrams (Chapter 2) 51 @ Pan Asia Publications Sdn. Bhd. Important Diagrams (Chapter 5) 57 @ Pan Asia Publications Sdn. Bhd.

Energy Level Diagram of Endothermic Reaction Formation of Grease Droplets During
the Cleansing Action of Soap

Energy
Droplet
of grease Hydrophobic
Products
part

ΔH positive
Soap anions
Reactants
Hydrophilic
part

Important Diagrams (Chapter 3) 53 @ Pan Asia Publications Sdn. Bhd. Important Diagrams (Chapter 5) 59 @ Pan Asia Publications Sdn. Bhd.