Chemistry OCR AS F321 Atoms, Bonds and Groups 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: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012actually it is correct because alchol can from hydrogen bond as it interacts with water molecules excellent scorpio u are on a roll!(Original post by scorpio22)
1-It increases the rate without being used up.It also lowers the activation energy therefore more molecules have energy equal or greater to activation energy. This lead to more frequent successful collisions.
2-Alcohol interacts with the hydrogen bonds in h20 molecules as the water break the hydrocarbon chain and forms a new compound as it acts as a solvent.
I don't actually think answer 2 is right lool. -
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012Why has carbon have higher m.p than mg ?(Original post by PrincessMedic)
I'm so far behind with unit 2
Can someone ask me a unit 1 question, please?
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012Giant covalent structure--> More energy needed to break the bonds----> higher melting point when compared to Mg? Is that right?
Also, does anyone find f322 easier than f321 or is it just me?Last edited by HeavyTeddy; 16-04-2012 at 08:04. -
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012very good correct(Original post by HeavyTeddy)
Giant covalent structure--> More energy needed to break the bonds----> higher melting point when compared to Mg? Is that right?
Also, does anyone find f322 easier than f321 or is it just me?
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012Oh gaaad this isn't really my place to chip,but I remember this paper was the death of me.
If any of you guys need any past papers for any of the OCR Chemistry A units, I'd recommend this site:
http://pastpapers.org/chemistry-as-papers
Good luck and all peeps!
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012I use that one too.(Original post by cosmobear92)
Oh gaaad this isn't really my place to chip,but I remember this paper was the death of me.
If any of you guys need any past papers for any of the OCR Chemistry A units, I'd recommend this site:
http://pastpapers.org/chemistry-as-papers
Good luck and all peeps!
I go through all the past papers then i go onto the more recent ones as the questions have gotten harder however if you start with 2002 then it's a bit easier as it's repetitive -
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012I know what you mean, from about 2002-2008 the papers are pretty much the same obviously just a change in the wording, and I went through all of those and mark schemes and using that bloody OCR book. The last time I sat the paper I was just like whaaaa?!(Original post by scorpio22)
I use that one too.
I go through all the past papers then i go onto the more recent ones as the questions have gotten harder however if you start with 2002 then it's a bit easier as it's repetitive
, there were definitely some freaky questions. I'd recommend reading those how science works bits in the OCR book, they seem to love those types of questions 
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012HEY!!(Original post by PrincessMedic)
Aha thanks I really want an A in both too, but I know literally nothing for F322 Wow, that's a a lot of people with A's! We haven't sat the paper yet, but people didn't do too well in the mocks 
Ah, same with me for Biology...oh my gosh, the Cells, Exchange and Transport exam is in exactl a month! I don't like the plants section, just doesn't make sense! And we just started Bilogical molecules and the exam is in 5 weeks
sorry for the late reply...
Ihave been so busy and i get carried away and forget to reply
hows ur revision going?
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012THANK YOU.(Original post by otrivine)
actually it is correct because alchol can from hydrogen bond as it interacts with water molecules excellent scorpio u are on a roll!
Sorry for late reply but i get so busy within the week and get under pressure to complete my work.
Wanna do some more questions around 8/9 tonight??
BTW i need to thankyou.
I had a chemistry mock on monday. and the mistake that you made for reacting propene with ethanol got me marks as it was the question that came up,i can remember trying to figure out why you was wrong even though your equation was balanced with right conditions.
plus stereo isomers came up too i was rejoicing lool including the Br2 and Ch4 electrophillic additon .
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012Totally agreed,(Original post by Man-Utd)
f321 is easy when you start thinking about it ....its f322 thats gonna hurt
we have still not finished learning.plus i have resits in other lessons...this is gonna kill me
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012Woow well done! Nice to hear that(Original post by scorpio22)
THANK YOU.
Sorry for late reply but i get so busy within the week and get under pressure to complete my work.
Wanna do some more questions around 8/9 tonight??
BTW i need to thankyou.
I had a chemistry mock on monday. and the mistake that you made for reacting propene with ethanol got me marks as it was the question that came up,i can remember trying to figure out why you was wrong even though your equation was balanced with right conditions.
plus stereo isomers came up too i was rejoicing lool including the Br2 and Ch4 electrophillic additon .
yep sure I will speak to you at 8pm I got more A grade questions for you! Ansi hope u got some ready for me thanks
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 20128 it is.(Original post by otrivine)
Woow well done! Nice to hear that yep sure I will speak to you at 8pm I got more A grade questions for you! Ansi hope u got some ready for me thanks
I have to revise for classification,maintaining biodiversity test mock for tommorow..(fml ) but i will be done by 8 -
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012(Original post by scorpio22)
Totally agreed,
we have still not finished learning.plus i have resits in other lessons...this is gonna kill me
WE CAN DO IT......TOGETHER
lets help each other with tips ans stuff......
listen, the trick with chemistry is the balancing it with other subjects issue....sometimes, i find myself not focusing much on other subjects because of it -
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012just you(Original post by HeavyTeddy)
Giant covalent structure--> More energy needed to break the bonds----> higher melting point when compared to Mg? Is that right?
Also, does anyone find f322 easier than f321 or is it just me?
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012Shall we start I am also doing bio f212 !(Original post by scorpio22)
8 it is.
I have to revise for classification,maintaining biodiversity test mock for tommorow..(fml ) but i will be done by 8 -
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012yh we can start....10 mins sorry..(Original post by otrivine)
Shall we start I am also doing bio f212 ! -
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Re: Chemistry OCR AS F321 Atoms, Bonds and Groups May 2012U. Start!(Original post by scorpio22)
yh we can start....10 mins sorry.. but please answer u take very long to reply back!
Ah, same with me for Biology...oh my gosh, the Cells, Exchange and Transport exam is in exactl a month! I don't like the plants section, just doesn't make sense! 
yep sure I will speak to you at 8pm I got more A grade questions for you! Ansi hope u got some ready for me thanks
i need to constantly go over everything...*sighs*
