Greetings everyone!
It has been a while (busy with running revision workshops and classes) since i last blog on this chemistry portal – where international community of chemistry students and educators come together to share thoughts on 3 main points:
- Chemistry Tips
- Exam Strategies
- Chemistry Phenomenon
If you are a Sec 4 / 5 student in Singapore, i hope you are spending time to revise on what you have learned in the past 2-3 years. For Chemistry, many students have this misconceptions and wrong mindset that Chemistry is a “memorising subject” and you can do a last minute revision (i.e. memorising most parts of the chemistry textbook or notes from teachers) before you GCE ‘O’ Level Chemistry Examinations – both Pure Chemistry as well as Combine Science (Chemistry).
This is certainly not true, contrary to the beliefs of many students, fueled by the claims from their friends, peers and seniors – that they should only start revising for their chemistry examinations after their Preliminary Exams (school exams) and when nearer to GCE “O” Level Chemistry papers. Do note you are “digging your own grave”! [sorry if you find my language abit aggressive] I just want to highlight the importance of doing revision immediately NOW! with O Level Chemistry Exams in about 30 days time. I would rather be aggressive and save a few more souls, rather than loosing several of you due to the wrong mindset.
In the next blogposts, i will share with you revision techniques as well as several tricky Chemistry Examination Questions.
PS: if you have been studying very hard for your chemistry, but have yet to score the marks you deserved – it may be due to the fact that your concepts of chemistry are not crystal clear yet i.e. there are misconceptions (and thus mistakes and errors) that prevents you from scoring! The book i wrote last august Up Your Chemistry Grades Now will be the book to address it.
Stay Tuned! =)
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It has been a busy September for me – getting students to revise their work and clear any misconceptions that they have in their Chemistry – in order to prepare for their School’s Chemistry Preliminary Examinations.
Amidst the busy schedule, I am so happy that during this period where Singapore celebrates Teacher’s Day (different countries celebrate on different dates), my chemistry students still remember me as “A Coach; A Teacher“.
There were several surprises from different groups / classes and i must write this blogpost to sincerely Thank them for their presents and wishes! Thank you very much! I appreciate the gestures! =)
(haha. there are in fact 3 different cheesecakes, but they all look so yummy, that i ate 2 of them before i took out my hp to take a picture of the last one)
(Going to use it when i read my Self-Development Books and Chemistry Books)
(Yummy Yummy Treats!)
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Mole Calculations, also commonly known as Mole Concepts & Chemical Calculations had been identified by students and educators alike, to be one #1 Killer Topic in GCE ‘O’ Levels Chemistry, IP Chemistry, IB Chemistry and IGCSE Chemistry.
Recently, we have seen more students asking us to discuss more in this chemistry blogsite. One of my chemistry student, who is committed to do well in the october’s GCE ‘O’ Levels Chemistry Examinations, had sent me a series of questions related to Mole Calculations.
They are questions that are not really difficult to comprehend and score, but you must have strong essential concepts & a good strategy to solve it. Let’s check out the questions:
Question 1:
A mixture of 8g of hydrogen gas and 8g of oxygen gas is burnt and the rxn is represented by the equation below. What is the mass of water formed?
2H2(g) + O2 (g) –> 2 H2O (l)
A) 9g
B) 18g
C) 36g
D) 72g
&
Question 2:
An element of E forms a hydride with the formula EH3 which contains 90% of E by mass. What is the relative atomic mass of E?
A) 27
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