AS OCR chemistry B (SALTERS) F331 on the 15th may 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: AS OCR chemistry B (SALTERS) F331 on the 15th may 2012Nope, just electronic configuration of standard elements, and how their space in the periodic table lets you know that!(Original post by totw)
Do we need to know anything about why Cu and Cr don't follow the pattern for electron structure???
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Re: AS OCR chemistry B (SALTERS) F331 on the 15th may 2012Does anyone have any ideas of what areas will come up in this F331 exam
I have revised it all and such but if anyone knows if there are any likely things to come up which didnt in Jan it would be sueful to look over them more so
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Re: AS OCR chemistry B (SALTERS) F331 on the 15th may 2012Some people have(Original post by Numan786)
lol is it just me or has everyone left this revision a little late ?
others might just want to top up in prep
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Re: AS OCR chemistry B (SALTERS) F331 on the 15th may 2012As long as you are comfortable with EVERY point on the specification you will be absolutely fine(Original post by xOsugaplumfairy)
I'm kinda scared now...
But i've done every single past paper, read my revision guide, read the bloody story lines and if its still hard im gonna guage my eyes out literally..
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Re: AS OCR chemistry B (SALTERS) F331 on the 15th may 2012It acts like a sieve for isomers.(Original post by vicky8761)
so freaked out about this exam. can anyone explain to me what a zeolite is? i never quite understood
it has holes/pores in it which allow straight chain isomers through, but traps branched chain isomers.
and this separates the isomers -
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Re: AS OCR chemistry B (SALTERS) F331 on the 15th may 2012(Original post by vicky8761)
so freaked out about this exam. can anyone explain to me what a zeolite is? i never quite understood
Also worth noting that some questions simply want the answer 'Large surface area' when asking about catalysis and zeolites.(Original post by dongonaeatu)
It acts like a sieve for isomers.
it has holes/pores in it which allow straight chain isomers through, but traps branched chain isomers.
and this separates the isomers -
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Re: AS OCR chemistry B (SALTERS) F331 on the 15th may 2012which kind of question?(Original post by Salmonidae)
Also worth noting that some questions simply want the answer 'Large surface area' when asking about catalysis and zeolites.
i know when it asks what is a catalytic poison, you get one mark for saying it reduces the catalysts surface area -
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Re: AS OCR chemistry B (SALTERS) F331 on the 15th may 2012I think by saying that it has a larger surface area this is one of the reasons why it speeds up a reaction. So any question about how catalysts will speed up a reaction. I think(Original post by dongonaeatu)
which kind of question?
i know when it asks what is a catalytic poison, you get one mark for saying it reduces the catalysts surface area -
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Re: AS OCR chemistry B (SALTERS) F331 on the 15th may 2012As well as what others have said, it is the catalyst for cracking, forming a branched alkane and alkene from a straight chai alkane(Original post by vicky8761)
so freaked out about this exam. can anyone explain to me what a zeolite is? i never quite understood
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Re: AS OCR chemistry B (SALTERS) F331 on the 15th may 2012I think it was along the line of 'what properties make a zeolite a good catalyst?' as opposed to 'what allows a zeolite to differentiate between straight and branched chains?' or somthing along those lines.(Original post by dongonaeatu)
which kind of question?
i know when it asks what is a catalytic poison, you get one mark for saying it reduces the catalysts surface area -
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Re: AS OCR chemistry B (SALTERS) F331 on the 15th may 2012Do you think we need to know about the squeaky pop test for hydrogen gas?(Original post by Salmonidae)
I think it was along the line of 'what properties make a zeolite a good catalyst?' as opposed to 'what allows a zeolite to differentiate between straight and branched chains?' or somthing along those lines.
Mg + Water = Mg(OH)2 + H2. -
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Re: AS OCR chemistry B (SALTERS) F331 on the 15th may 2012because its chemistry(Original post by Ilyas)
Why does it feel like the end of the world?
others might just want to top up in prep 
