Comments on: SPA - Possible Practical Questions http://www.simplechemconcepts.com/spa-possible-practical-questions/ Chemistry Made Easy Wed, 07 Jan 2009 17:13:03 +0000 http://wordpress.org/?v=2.6.2 By: Clara http://www.simplechemconcepts.com/spa-possible-practical-questions/#comment-1512 Clara Tue, 23 Sep 2008 11:11:30 +0000 http://simplechemconcepts.com/spa-possible-practical-questions/#comment-1512 Hey ! I was wondering why doesn't Aluminium Carbonate exist ? And why is it that Aluminium Chloride, Al3Cl6 is a covalent compound ? Hey !
I was wondering why doesn’t Aluminium Carbonate exist ?
And why is it that Aluminium Chloride, Al3Cl6 is a covalent compound ?

]]> By: cheryl http://www.simplechemconcepts.com/spa-possible-practical-questions/#comment-1471 cheryl Sun, 14 Sep 2008 08:11:50 +0000 http://simplechemconcepts.com/spa-possible-practical-questions/#comment-1471 hi! i am having my SPA next tuesday. but i am unsure about how we can find out basicity of acid used during titration? hi!
i am having my SPA next tuesday.
but i am unsure about how we can find out basicity of acid used during titration?

]]> By: jean http://www.simplechemconcepts.com/spa-possible-practical-questions/#comment-1444 jean Sun, 07 Sep 2008 15:10:36 +0000 http://simplechemconcepts.com/spa-possible-practical-questions/#comment-1444 How do you do SPA Skill 3? Are there any possible spa questions asked? How do you do SPA Skill 3? Are there any possible spa questions asked?

]]> By: raihan http://www.simplechemconcepts.com/spa-possible-practical-questions/#comment-1326 raihan Tue, 02 Sep 2008 10:02:13 +0000 http://simplechemconcepts.com/spa-possible-practical-questions/#comment-1326 Hey, i heard this year's chemistry o level exam, most probably the practical test will be about the REDOX TITRATION. Can you tell me briefly the tips or some important point when doing the redox titration? and also can you tell me where can i get some example of redox titration video or examples? thanks =D Hey, i heard this year’s chemistry o level exam, most probably the practical test will be about the REDOX TITRATION. Can you tell me briefly the tips or some important point when doing the redox titration? and also can you tell me where can i get some example of redox titration video or examples? thanks =D

]]> By: sean http://www.simplechemconcepts.com/spa-possible-practical-questions/#comment-1031 sean Tue, 05 Aug 2008 15:55:20 +0000 http://simplechemconcepts.com/spa-possible-practical-questions/#comment-1031 Hi 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 Hi 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

]]> By: zara http://www.simplechemconcepts.com/spa-possible-practical-questions/#comment-1030 zara Tue, 05 Aug 2008 10:22:56 +0000 http://simplechemconcepts.com/spa-possible-practical-questions/#comment-1030 my 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. my 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.

]]> By: sean http://www.simplechemconcepts.com/spa-possible-practical-questions/#comment-1027 sean Mon, 04 Aug 2008 06:29:22 +0000 http://simplechemconcepts.com/spa-possible-practical-questions/#comment-1027 Hi 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.. Hi 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..

]]> By: Clara Tan http://www.simplechemconcepts.com/spa-possible-practical-questions/#comment-1024 Clara Tan Sun, 03 Aug 2008 09:06:50 +0000 http://simplechemconcepts.com/spa-possible-practical-questions/#comment-1024 Hey i'm wondering, What is the pH value of an amphoteric oxide ? And how do you find out the value of it ? Hey i’m wondering,
What is the pH value of an amphoteric oxide ? And how do you find out the value of it ?

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