09 May
Posted by: sean in: Chemistry Practicals / SPA, Chemistry Qns & Ans
Less than 2 months to GCE O Level, Have you passed your Prelim Exams? Tell me what you need to SCORE for your O Level Chemistry? Thanks for visiting!
Several parents and students alike have asked me on the possible practical questions that can come out for the SPA examinations.
I have this to say - SPA is in fact very very simialar to the GCE O Level Practical Examinations that we had last time. There is not much difference between the chapters/topics that we have studied for the last 10 years. Basic Chemistry is essentially Basic Chemistry. The theories does not differ that much during the 10 - 20 years period. As such, all the practicals experiments will always revolves around the few main topics and you should be aware of it.
Check out the following Practical Guidelines that are shown in the SEAB website once again:
Scientific subjects are, by their nature, experimental. It is therefore important that the candidates carry out appropriate practical work to facilitate the learning of this subject. A list of suggested practical work is provided.
1. Separation techniques including filtration, simple paper chromatography and distillation
2. Measurements of temperature based on thermometers with 1°C graduation
3. Determination of melting point and boiling point
4. Experiments involving the preparation of salts
5. Experiments involving the solubility of salts
6. Titration involving the use of a pipette, burette and an indicator such as methyl orange or screened methyl orange; full instructions and other necessary information will be given for titration other than acid/alkali and the use of other indicators
7. Identification of ions and gases as specified in the syllabus
8. Experiments involving displacement reactions
9. Tests for oxidising and reducing agents as specified in the syllabus
10. Experiments involving speed of reactions
11. Experiments involving organic substances such as polymerisation and test for saturationThis is not intended to be an exhaustive list. Reference may be made to the techniques used in these experiments in the theory papers but no detailed description of the experimental procedures will be required.
So based on the above guidelines, you can somehow make up the list of experimental set-ups that they want you to conduct.
Popularity: 40%
4 Responses
Clara Tan
03|Aug|2008 1Hey i’m wondering,
What is the pH value of an amphoteric oxide ? And how do you find out the value of it ?
sean
04|Aug|2008 2Hi Clara.
Amphoteric Oxide acts on both acidic and alkaline solution. It normally has a range of pH value. Based on my industrial experience it seems to be more towards acidic pH range. In order to find out the pH of it, the best way is to get it from industrial data. Being a technical specialist in US MNC before, i would search for Chemical Manufactuer and it seems that Zinc Oxide for example has pH range between 5.0 to 8.0. Hope this information helps.
This is not tested in GCE O Level Examinations, fyi. But for interest wise, will be interesting to know..
zara
05|Aug|2008 3my practical exam is tomorrow, and i know its impossible to get the answer from here today, but its worth a try.
i dont know how to classify which metals or non-metals are soluble or not in water. and i also dont know what the colour of certain substance like Copper(II) Oxide. is it black or dirty green??
i’d really appreciate if you could answer this today.
thank you.
sean
05|Aug|2008 4Hi Zara,
I am not sure which country you are from and which education system you follow.
But in general if we say a metal is soluble in water, it means that the metal reacts with water to form a salt and hydrogen gas. As such, based on the reactivity series of metal, all metals will tend to dissolve in water except Copper, Silver, Gold and Platinum. Having said that, some metals react only with hot vapour (i.e. steam) and not cold water.
On the colour of Copper(II) oxide, i always tell my student that only 5-10% of chemistry need to be memorised. The rest are concepts that once you know, it will be easy to answer exam questions. CuO is one that you need to memorise that it has a distinct black colour. If you have done experiment in the lab, you may have seen CuO before as Black colour.
I hope this information helps you in your practical exams.
Do drop me an email or comments here. I would love to hear from you..
Cheer
Sean
Master Trainer
SimpleChemConcepts.com
Leave a reply
Update me via Email for New Blog Posts
Upcoming Events
Click here to tell us what you need to SCORE in Chemistry
Founder of SimpleChemConcepts

Welcome! Hi, I am Sean Chua, Founder & Master Trainer of SimpleChemConcepts.com I have been coaching and guiding tens and hundreds of students in Chemistry for the last 10 years using accelerated learning techniques & assoications. SimpleChemConcepts is set up with the intention to share my Chemistry knowledge with all students, parents and educations all over the world. To read more about me, click HERESubscribe our Newsletter & Download Your FREE Copy of Balance Chemical Equations Tips Video!

Privacy Policy: We Respect Your Email PrivacySearch
Vote Your Biggest Challenge in Chemistry
Secret Notebook to Mole Concepts Launching Soon!
Click here to find out more!
Popular Posts
Recent Comments
Categories
Article Expert Author
Archives
TEAM BLOGS
Sean's Music Jukebox