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OCR AS - Chemistry Unit F322 - Chains, energy and resource - REVISION! watch

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    (Original post by kingam)
    have it on weds promise teacher wasnt in im not lying lol
    king if u didnt get my message please take a picture of it and send it to me :P

    [email protected]

    orpost it here:P
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    Hi there could someone please upload a copy of the Chemistry paper cheers!
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    please someone post pictures/ copies or whtever form of the paper pleaseeeee
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    I found the paper pretty good. But my worry is that the grade boundaries might be high. I really want a nice solid A grade around the 130-135 mark region, since I did this paper as a retake it's pretty much my last chance to do well.

    I reckon the grade boundaries well range around 77-80. Usually OCR like to stick around 77 according to past grade boundaries and thinking about how easy the June 2009 paper was. Anyway, I hope that this answers the people who are wondering about what the grade boundaries will be

    Good luck, you all deserve good grades!
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    (Original post by Medifield)
    I found the paper pretty good. But my worry is that the grade boundaries might be high. I really want a nice solid A grade around the 130-135 mark region, since I did this paper as a retake it's pretty much my last chance to do well.

    I reckon the grade boundaries well range around 77-80. Usually OCR like to stick around 77 according to past grade boundaries and thinking about how easy the June 2009 paper was. Anyway, I hope that this answers the people who are wondering about what the grade boundaries will be

    Good luck, you all deserve good grades!
    fair enough what do you think a B will be like raw mark
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    king can u please upload pictures o t paper please!!
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    kingam jsut inc ase u didnt get my message, please send the pictures to me - either by email or just attach it in your message, there is an insert photo option at the top of the textbook of the message thnx!
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    (Original post by kingam)
    fair enough what do you think a B will be like raw mark
    Maybe around 70-71? Check past grae boundaries
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    guys:

    Higher atom economy or percentage yield, there is no right or wrong answer , you can argue both ways.

    low percentage yield = innefficient system, perhaps costly
    low atom economy more waste products ect

    so, unless you ACTUALLY know how low the atom economy is, or the percentage yield, you can't say which one is worse
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    (Original post by barzy_j)
    If I remember correctly the product was alcohol and the by product was CO2 which means they were obviously looking for you to say you need improve atomeconomy

    the percentage yeild was very low

    ^^ both are factors
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    (Original post by barzy_j)
    Yes both are factors but I think they were looking for the fact that controlling rising CO2 levels is more important than using alcohol as a beverage

    you're right

    can you remember the question though?(let me re-analyse)
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    (Original post by barzy_j)
    No idea about the whole question on the whole just remember them asking which needed to be improved and why
    oh i get you

    yeah

    i remember seeing the percentage yield as around 55% and the atom exonomy like 80%

    roughly

    but all i knew is they both impact negatively, and if it said harming the environment, and such, then i'd understand it'd be Co2, you're probably right, but i said both have negative attricutes, i cant say which one, but i will say that ato economy = more waste products, lower efficiency, less desired products, but low percentage yield = less efficients, and so, they each produce a problem, and both need to be looked at

    (this was the last part)
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    Guys for the diagram question (on the penultimate page I think, there were two boxes, one of them was HBr plus something), was one of the answers 1,1-dimethylcyclohexane? Cheers
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    has anyone got the paper for this exam? be nice to look back over it and reflect.
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    Yeah, usually some people have the paper. Please could someone scan it in? It would be really good to look over it again to have a rough idea what grade I got
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    (Original post by barzy_j)
    Now thinking about it, I think one of my answers was wrong, I don't think the BR had to go on the third carbon but rather on the 1st or the 2nd - so you would bromo methyl cyclohexane

    DAMN!
    im a muppet i did the br on 1st and second but didnt include the methyl
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    king please upload the paper!! or send it to me ;P the pictures pleaseeee, i'vee been waiting for so long
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    (Original post by kingam)
    im a muppet i did the br on 1st and second but didnt include the methyl
    please upload the paper thnx
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    (Original post by barzy_j)
    I literally cannot believe I did that :| - every mark lost kills
    im dying tbh i think i have got 66 marks and thats crap in mock jan 11 i got 74
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    (Original post by kingam)
    im dying tbh i think i have got 66 marks and thats crap in mock jan 11 i got 74
    king stop igoring me, upload the paper please!! :P
 
 
 
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