OCR B F334 - Chemistry of Materials - 19th June 2012
Chemistry exam discussion - share revision tips in preparation for GCSE, A Level and other chemistry exams and discuss how they went afterwards.
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Re: OCR B F334 - Chemistry of Materials - 19th June 2012I am petty sure we do(Original post by Hanz_a93)
Do we have to know how to name complexes?? is it even in the spec?? im expecting the worst for this paper after what happend with f335... :/
It is surmised quite nicely in the revision guide if you have that
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Re: OCR B F334 - Chemistry of Materials - 19th June 2012Realy? there is a whole page on it in the revision guide... thats slightly confusing
I think your best bet is to learn how to do it just in case, but centre your revision on the topics that always seem to come up (or just do a load of past papers)... -
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Re: OCR B F334 - Chemistry of Materials - 19th June 2012Check this website:(Original post by 05bickea)
hey! does anyone have the 'end of module test' answers for this unit? teachers gave us the papers but wouldn't give us the mark schemes in case we passed them on to younger years...
http://benjamin-mills.com/chemistry/sac/
It has all the activities, end of module tests etc.
It's the old syllabus so the tests aren't identical but the majority of the questions are the same
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Re: OCR B F334 - Chemistry of Materials - 19th June 2012Anyone else going through the past papers feeling like they already know everything. I'm resitting this from Jan and i'm kinda beginning to feel revising past papers won't be worth it. I think OCR have changed the people who write the papers because the style of the last two have been very different to past years :/
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Re: OCR B F334 - Chemistry of Materials - 19th June 2012oh okay so do we just need to know that if Tg is higher than rt, it's brittle and lower than rt, it's flexible?(Original post by ManPowa)
room temperature
Also wondering whether you know from this [Cu(EDTA)] 2– , how do we work out it's octahedral and has coordination no. 6?
woops dont worry, realised it's a hexadentate!Last edited by Cleoleo; 17-06-2012 at 01:29. -
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Re: OCR B F334 - Chemistry of Materials - 19th June 2012thanks so much!(Original post by SimpleGirl)
Check this website:
http://benjamin-mills.com/chemistry/sac/
It has all the activities, end of module tests etc.
It's the old syllabus so the tests aren't identical but the majority of the questions are the same
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Re: OCR B F334 - Chemistry of Materials - 19th June 2012Thanks!(Original post by haibara ai)
I am petty sure we do
It is surmised quite nicely in the revision guide if you have that
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Re: OCR B F334 - Chemistry of Materials - 19th June 2012Legend! Thanks!(Original post by icedragon)
I made a Mediafire folder for all the past papers and mark schemes including Jan 12 for F334 and F335. Here you go:
http://www.mediafire.com/?qylj8ljevsks6
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Re: OCR B F334 - Chemistry of Materials - 19th June 2012It depends on the question - it should specify what the products are.(Original post by Hanz_a93)
How should we know when to use aqeous acid for hydrolysis of esters???
Or atleast mention something that hints the products.
With ester hydrolysis, an alcohol is always produced. The other product differs depending on how the carbonyl group reacts with the reagent.
If the question mentions a carboxylic acid was produced then you would need to heat under reflux with dilute acid (they also accept aqueous acid).
If a caboxylate ion is produced then you use dilute alkali instead.
If there is no context give at all and they simply ask you to state the reagents and conditions for ester hydrolysis then "heat under reflux with aqueous acid/alkali" should award you the mark.
EDIT: I just checked a few mark schemes and it seems that they allow 'dilute acid' and 'aqueous acid' a lot of the time, despite the expected answer being '(mod) concentrated acid'.Last edited by SimpleGirl; 17-06-2012 at 12:30.
