2010-04-18

Minggu Sains & Teknologi 2010

Suggested Topic for Pamphlet/Poster/PowerPoint Design
1. Chemical related careers
2. Uses of isotope in daily life
3. Contribution of scientist towards chemistry
4. Advantages & Disadvantages of various voltaic cell
5. Importance of recycling and systematic disposal of used batteries
6. Application of neutralisation in daily life
7. Uses of sulphuric acid
8. Uses of ammonia
9. Alloy
10. Polymers
11. Glass
12. Ceramics
13. Methane and its effects on everyday life
14. Isomerism
15. Homologous series
16. Uses of alcohols; misuse and abuse of alcohols
17. Uses of carboxylic acids
18. Esters; natural sources, uses
19. Effects of Fats on health
20. Uses of palm oil in food production
21. Food additives & Food label
22. Modern Medicine and its side effect
23. Traditional Medicine

Other topics must get approval from your chemistry teacher first.

Your pamphlet/poster/powerpoint desgin must be informative, with pictures, extra information from other resources and creative!

Public Speaking
Theme: Application of chemistry in daily life.
Time alocated: 5 minutes
Topic: Choose a topic related to the theme and explain with examples/latest information/technology. Perhaps elaborate more its benefit/misuses/effects to human being/environment.

2010-04-17

Palm Oil Based Oleochemicals



This is a promotional video from Malaysia Palm Oil Councils. The video describes much in details the benefit of palm oil with many examples of oleochemicals derived from palm oil.

2010-04-13

Why is Platinum So Expensive?

Platinum, Pt is one of the transitition elements. It is very expensive. Watch this video to find out the reason.

What are the special characteristics of platinum?

2010-04-12

Definition of Redox Reaction

From chem2U

One way of remembering the defnition is by using mneumonics. The following is one example: OIL-RIG


Other example of mneumonics:

  1. "GEROA", "LEORA"—Gain Electron Reduction Oxidizing Agent, Lose Electron Oxidation Reducing Agent

2010-03-31

SPM Corner - Alkenes


Isomerism


To view a list of isomers for all alkanes, please click here.

Compare Hexane and Hexene

Recently my students just carried out experiments to compare hexane(C6H14) and (C6H14) in terms of sootiness of flame during combustion. Filter papers are used to collect soot formed during the experiments.



It is obvious from the filter papers, hex-1-ene produces more soot than hexane during combustion. It is due to percentage of carbon content.   Though both hex-1-ene and hexane have 6 carbon atoms per molecule, but hex-1-ene has higher percentage of carbon content than hexane.

2010-03-12

Paper 3 SPM 2005 - Planning an Experiment


In paper 3 Chemistry SPM, a student is asked to plan an experiment based on the situation given. I have given this question to my students as an exercise. Most of the time, they would give me an wrong experiment plan. They planned experiment exactly the same as the experiment they carried out to investigate how the concentration of sodium thiosulphate affect its rate of reaction with sulphuric acid. 

Samples of answer please click here.

Aspirin


Aspirin is one example of analgesic which is normally used in treatment for headache and fever. However it is not suitable for kids as it can cause internal bleeding in the stomach.

2010-02-22

Atomic Model


An atom consists of three types of subatomic particles:
  • proton
  • neutron
  • electrons
Each subatomic particle have different properties. Students are advised to know their differences in terms of relative charge, relative mass and location in an atom.

In Paper 2 SPM 2006,  students are asked
  • to compare the relative mass and the charge of two of the subatomic particles[4 marks].
  • describe fully the atomic structure of lithium[6 marks].
  • draw the structure of an atom of sodium or potassium[7 marks].
In Paper 2 SPM 2007, students are asked to
  • describe and the atomic structure of hydrogen[4 marks].

2010-02-21

Haber Process

Fritz Haber won the Nobel Prize in Chemistry in 1918 for synthesis of ammonia.
Read more about the
in the Nobel Prize Award Ceremony in 1920.

How to Determine Rate of Reaction

Vulcanization of Rubber

Latex

Rubber tree(Hevea brasiliensis) is quite common in Malaysia. The first rubber tree in Malaysia still can be found is in Kuala Kangsar, Perak. 

Latex is a white white milk-like fluid secreted by rubber tree.  It's a type of polymer, called polyisporene. Due to its elasticity, latex is widely used to produce latex glove, condoms and clothing.