(Image by shito)

Dear Parents and Students based in Singapore,

I will be conducting an Intensive GCE O Level Pure Chemistry Sec 3 Topical Revision Workshop this coming March school holiday for students taking their O Levels this year. Objective is to do intensive revision for the Sec 3 fundamental yet essential topics so that students can effectively understand the application questions in Sec 4 topics. (more…)

Halo Planet,

Wishing you a Happy Chinese New Year,we are going to have our reunion dinner in awhile, so i thought i wanna come up to do a post for all that celebrate this important festival for the chinese in this planet. For others, enjoy your holiday…if you country takes Chinese New Year as a public holidy. In Singapore, we are given 2 days to celebrate this occasion.

Make this year a Happy and Successful One for You!
Chinese New Year means celebration and the Year of the RAT is a special one to chinese as it is (more…)

One last question (from Jennifer) for us to discuss on:

7. Why does Chlorine act as an Oxidising agent on potassium bromide?

A free response question for you to express your answers.

All the posts are meant for all global readers and students. It is not just for our local Sec 3, 4 and 5 students.

Do feel free to let us know your thoughts on it,

6. How does the mass of Copper (II) oxide change when it is heated in Hydrogen and in Oxygen

Mass after heating in Hydrogen ,  Mass after heating in Oxygen
A) decrease , decrease
B) decrease , unchanged
C) unchanged ,  decrease
D) unchanged ,  unchanged

Ans: B

What are your thoughts?

All these are good questions that will test you on your basic concepts of this chapter on Redox Reactions.

5. When iron (III) sulphate is reduced to iron (II) sulphate, the colour of the solution turns from

A) brown to yellow
B) green to yellow
C) red to colourless
D) brown to green

Ans: D

Looking forward to hearing to your answers.
Sean

More Food for Thoughts:

4. When iron (II) oxide is heated strongly with carbon

A) iron ions gain 2 electrons
B) carbon is reduced
C) carbon is acting as the oxidising agent
D) only carbon monoxide is formed

Ans: B Correct Answer is (A).

Best way to learn is to work on the problem on your own first ~

More question for discussion.

By the way, i will come into the blog and sum up all the answers and discussed with you on the derivation on the answer, after 1-2 weeks. What i wish to do is to see students participating and answering the questions.

3. An oxidisng agent was observed to turn from orange to green. It is most likely to be:
A) acidified potassium manganate (VII)
B) acidified potassium dichromate (VI)
C) maganese (IV) oxide
D) iron (III) chloride

Ans: B

Hear from you…