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OCR Chemistry F322~ 4th June 2013~ AS Chemistry Watch

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    Hard A= 72
    42
    15.22%
    It was okay A= 76
    99
    35.87%
    Easy A= 79
    75
    27.17%
    Very Easy A=82
    60
    21.74%

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    (Original post by Ché.)
    You're completely correct - however, F326 does count within the A* score.
    You would need the 36/40 in your practical work for that too!

    Mathematics is so great!
    Lows you a whole module but you theoretically need to gain great in that too just in case, I guess...



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    Thanks for clarifying! I was really hoping that the practicals wouldn't count towards the A* - for some reason I did really well in the physics ones but not so much in the chemistry. Guess I can wave goodbye to my chances of getting A* in chemistry... (unless I do well enough in the exams to make up for it, but doubtful!).
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    (Original post by 14anonymous)
    Can someone uplaod the paler somewhere?
    Sure
    Paper is here:
    https://www.dropbox.com/s/95o74ojgt3...PER_merged.pdf
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    (Original post by SinghSTAR)
    My teacher told me that the largest number of C atoms you can get in an alkane ring is 6, so wouldn't the skeletal formula of Octane be a hexagon with two methyl groups extending from it?

    I remember it being discussed not so long ago.

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    that is what I did because i never knew a ring could be more than 6 carbons ;(. i did a hexagon with an ethyl group coming out of it :/
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    (Original post by theCreator)
    Just checking I have a copy of the paper, has anyone uploaded it yet or should I post the link here?
    Post the link please
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    (Original post by theCreator)
    Finally got a copy of the paper, I'll assume no one uploaded it yet, so i'll do it in a few minutes
    Its been uploaded

    Look at A* guy

    http://www.thestudentroom.co.uk/show...e=182&page=182
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    (Original post by sessess)
    Thanks for clarifying! I was really hoping that the practicals wouldn't count towards the A* - for some reason I did really well in the physics ones but not so much in the chemistry. Guess I can wave goodbye to my chances of getting A* in chemistry... (unless I do well enough in the exams to make up for it, but doubtful!).
    SAAAAAAME!
    You can man, you can!


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    (Original post by Fullycorporate)
    I think you have to specify that it's carbon to carbon but you may get a benefit of the doubt mark, I don't know tbh.
    i said carbon carbon double bond
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    (Original post by BingTaoBing)
    Also, in the thing about cracking in question 1.

    I said: Because a large range of different lengths of alkanes and alkenes could be produced from C15H32. There is no way to determine a specific product...

    Is this OK? Or have I missed something key?
    You needed to say that the c-c bond can break anywhere so the process is random. It was on a past paper.
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    (Original post by niceguy95)
    Its been uploaded
    HAHASHAH

    Anywho Unofficial markscheme being uploaded
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    Did people get H for the tertiary alcohol in q2?


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    I put for the use of Infrared Spec that you could use it to see whats in the ozone (like anything thats been emitted) d'ya reckon thats ok or?
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    (Original post by Farringtonn)
    Did people get H for the tertiary alcohol in q2?


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    yepp i did
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    For the use I wrote 'bre' was going to put breathalyser but thought it was wrong LOL


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    (Original post by AJFShaz)
    HAHASHAH

    Anywho Unofficial markscheme being uploaded
    I thought you were doing the markscheme , I just gave him the paper
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    Omg.. for the functional groups I wrote carboxyl and carbonyl.. please say at least one is right :'(

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    (Original post by wndms)
    Omg.. for the functional groups I wrote carboxyl and carbonyl.. please say at least one is right :'(

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    ermm im not sure but i put an ester and an alkene
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    (Original post by niceguy95)
    Where's needtosucceed, wanna how she found it
    hello! i was at school till late and only got home a little while ago, i've been reading everyones posts though. schools network doesnt let me log onto tsr

    anywhoooos..I thought it was generally a good paper. what really stumped me was that radical substitution question, eventually I figured it out though. the year 12's found the paper fairly difficult. other places to trip up was the yellow flame thing and the IR spec. i put butanal and 2-methylpropanal as I assumed they had to have the same functional group, so i discounted butanone.
    the calculations and other 2 mechanisms were a godsend! so was the chatliers principle and boltzmann distribution. I think i may have lost around 10 marks, which I'm quite happy with.

    how'd you find it?

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    Unofficial MS anyone?

    For the 5 marker question on equilibrium I put:

    - an increase in temp will shift the equalibrium to the LEFT (LHS), in the endothermic direction to oppose the change
    - due to the the forward reaction being EXOTHERMIC
    - an increase in pressure will shift the equilibrium LEFT (LHS)
    - as it is the side witch has the fewest moles of gas (on reactants side of equation)
    - without a catalyst, equalibroum position is (not changed) unchanged because a catalyst speeds up the forward and reverse reaction by the SAME amount

    Is that enough for the 5 marks?
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    (Original post by niceguy95)
    I thought you were doing the markscheme , I just gave him the paper
    I am it's being uploaded -_-
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    (Original post by wndms)
    Omg.. for the functional groups I wrote carboxyl and carbonyl.. please say at least one is right :'(

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    (Original post by irfymahmood)
    ermm im not sure but i put an ester and an alkene
    ester and alkene is correct.
 
 
 
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