Here is an common question on Mole Calculations. More specifically it involves skills in balancing chemical equations and writing ionic equations.

PS: Try it out and leave your suggested answer at the “Comments Section” right below this post.

Question:
Lead carbonate reacts with nitric acid to form 3 other products.
a) Identify the 3 products formed and write a balanced chemical equation.
b) Identify the spectator ions and then write the ionic equation.

Popularity: 15%

How to Design & Deliver Your Presentations using PowerPoints That Sizzle!

I have been presenting and coaching for many years (formally and informally). Many people ask me what is the best form of presenting to grab the audience’s attention and to achieve the end results that we aim for.

My answer is always: ” Every form of presentations has its own merits and downsides, but all can be used to achieve your final aim. The most important thing is to determine your group audience and the purpose of your presentations. For coaching sessions where i want my students to absorb faster and more effectively, i would use Flip-Charts and Whiteboards. Especially for Flip-Charts, which is required for Accelerated Learning Techniques. But for generating ideas across to the audience where visuals are very important - i will use PowerPoint Presentations.”

In Chemistry, an equation represents what occurs in a chemical reaction:

LHS –> RHS
Reactants –> Product(s)

3 types:
• Word Equation
• Chemical Equation
• Ionic Equation

For Chemical Equation –> Using Chemical Formulae to represent a reaction known to take place.

Step 1: Write down the Chemical Formulae of reactant & products.

Na + Cl2 –> NaCl ——- Balanced???

Step 2: Check the number of atoms of each element on both sides.

Above equation is not balanced. An equation is balanced when there is equal number of atoms if each element on both sides of the equation.

This afternoon i was at the cinema to catch the Dark Knight (after being recommended to me by my students).

I must say that this is the best action superhero film I have seen this year. Not only it has lots of exciting battle scenes, special mention must be given to the late Heath Ledger, whose acting role in the movie as the psychopath Joker, which I feel, has far surpassed batman. Not only has he showed us how a psychopath acts, every area of how a psychopath thinks and feels, he has carried it out very well. Hmm. This is not a website to review movies, so i would just say that this is one of the greatest movie this year, and it combines good cinematography, writings, plots, actions, sound effects and excellent actings. The movie shows love, humanity, good over evil & power of psychology.

Today i received 2 phonecalls  early in the morning. They are awesome calls that makes my day!

It was another Awesome event! In 2 days (in fact in 8hrs plus) we managed to share our knowledge on Organic Chemistry to a group of students committed to their success, and ensuring that they are equipped with all the essential basic concepts to handle all kinds of application questions in upcoming major chemistry examinations.

We have touched base comprehensively on Fuels and Introduction, Homologous Series, Functional Groups and the Physical & Chemical Properties of all families of organic compounds. We have also covered extensively on Macromolecules with lots of industrial and everyday life examples.

Graduation Class Photo

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Click to hear what Sean has to say about Organic Chemistry

Thank you for everyone’s support. Organic Chemistry Mastery Workshop is SOLD OUT!
Photos will be out in the next few days!
Cheers!

Popularity: 20%

This is a Organic Chemistry question that came out in 2006 Nov GCE ‘O’ Level Examination Paper 2.

Check it out!

Question:

(Click image to have a better view)

PS: Leave your suggested answer in the “Comments Section” right below this blogpost

Popularity: 44%

More Details Here

Popularity: 24%

(PVC Water Pipes in housing estates)

Many of you have heard or learned about Polymer in school. In layman’s term, it is known to many as “Plastics“, just like what my mother would call these group of substances.

Polymers are an important class of covalent molecular compounds in which the molecules are very big (macromolecules) and are made up of a large number of small repeating units or molecules linked together.

There may be several thousand repeating units in a polymer molecule. These small units from which polymers are made are called Monomers.