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OCR Chemistry A Exam Thread (Breadth - May 27 2016 and Depth - June 10 2016)

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Original post by Jitesh
Ah, I see now - so it is to do with the molar quantities

Why does it show adding the sum of the stoichiometric number of entity B?

Edit: nevermind misread it

Thanks a bunch! Not seen a question like that before lol

I should be thanking you since I learnt something new as well, good luck in your exams!
Original post by MilindS99
https://youtu.be/LUE6tj1-_z4
Last minute mechanisms revision video
:smile: good luck everyone!


for propagation they can now ask further substitutions, the old spec was restricted to one substitution of a C-H bond I think

Original post by Vanilla Poison
I should be thanking you since I learnt something new as well, good luck in your exams!


Good luck too!
Original post by SGHD26716
Does anyone have a prediction on what the extended answer questions could be?


Bonding and structure comparisons of different molecules?
Original post by JL124251
Bonding and structure comparisons of different molecules?


spectroscopy 99% sure will be some sort of big question (maybe structured)
Reply 664
Avatar for S.G.
S.G.
22
Original post by Jitesh
spectroscopy 99% sure will be some sort of big question (maybe structured)


Do you think there is anything else big that was missed in the breadth paper?
Mechanisms probs will come up in some way
Reply 666
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Mel0782
Where can I find more past papers from the old spec as I've done the sediment paper
Reply 667
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11...
9
I would say the chain length of hydrocarbons and the relative boling point would be on there as a long answer question. and of course something on infrared and mass spec
Original post by Mel0782
Where can I find more past papers from the old spec as I've done the sediment paper


http://www.ocr.org.uk/qualifications/as-a-level-gce-chemistry-a-h034-h434/
Just look under past papers and you want to do the atoms, bonds and groups and chains energy and resources

You can also do questions by topic but I'm not sure everything is relevant.
http://www.physicsandmathstutor.com/chemistry-revision/a-level-ocr-a/module-3/
http://www.physicsandmathstutor.com/chemistry-revision/a-level-ocr-a/
AS Papers
(edited 7 years ago)
anyone have the practice depth paper they could email to me? slightly stressing and want some last minute practice.
Anyone have the practice depth paper? Pretty sure I did the paper as a mock but lost it since.


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Original post by whitingh
Anyone have the practice depth paper? Pretty sure I did the paper as a mock but lost it since.


Posted from TSR Mobile


Original post by elisesnowden
anyone have the practice depth paper they could email to me? slightly stressing and want some last minute practice.


Here you go
H032-02-paper-Dec-15.pdf495.4KB
Reply 672
Avatar for Maz788
Maz788
Hey have u got the mark scheme for the practise paper?
Original post by Maz788
Hey have u got the mark scheme for the practise paper?

Too big for TSR https://encodable.com/uploaddemo/

Cheat and I'll find you
What topics do you think will come up?
Any predictions?
Original post by SGHD26716
Do you think there is anything else big that was missed in the breadth paper?


Dunno specific topic wise I'd just do past papers instead of speculating

Boltzmann and spectroscopy I reckon will be big or six markers tho
Sorry I know someone would have already probably posted what didn't come up in Bredth but can't be bothered to look back 34 threads pages worth of thread! haha, could someone tell me what didn't come up and is likely to in depth?? I have done both BIOLOGY and PHYSICS, and is has complied with the rule whatever doesn't come up in breath COMES UP IN DEPTH.
Original post by Ash Kay
What topics do you think will come up?
Any predictions?


In light of that awful depth paper for biology (awful in my opinion, anyway) I think a lot of it will be to do with practicals, like that MC/\T question with the spirit burner in the textbook.
Reply 678
Avatar for S.G.
S.G.
22
Can someone help with this question:

14.3g of hydrated sodium carbonate Na2CO3.10H20 is dissolved in water and made up to 250cm3 of solution.

What is the concentration of sodium ions in the solution in mol dm-3.

The answer is 0.4
Original post by SGHD26716
Can someone help with this question:

14.3g of hydrated sodium carbonate Na2CO3.10H20 is dissolved in water and made up to 250cm3 of solution.

What is the concentration of sodium ions in the solution in mol dm-3.

The answer is 0.4


1465488371579.jpg
There you go. Just ask if you don't understand anything.
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