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OCR A Chains Ring and Spec....How did you find it? watch

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    (Original post by morpheus)
    don't u hv unit 5 on Tues?
    My chemistry teacher didn't allow me to re-sit that unit, and i'm thanking her immensely for that. Today was my final science exam day (i still have english), and i am sooooo happy i dont have to revise this weekend for it (although i may be thinking quite the opposite come results day!)
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    i thought it was harder than jan, but i am just asking for 2 more bloody marks to have my B and i'll be happy! i was SURE of the spec question this time (maybe cos i understood it) so i hope that will get me some. i put HCl instead of acid catalyst for the esterification- think i'll get the mark??
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    (Original post by CogitoErgoSum)
    i thought it was harder than jan, but i am just asking for 2 more bloody marks to have my B and i'll be happy! i was SURE of the spec question this time (maybe cos i understood it) so i hope that will get me some. i put HCl instead of acid catalyst for the esterification- think i'll get the mark??
    I think so.. I put H2SO4 cos technically they are acid catalysts.. I think!
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    (Original post by violet)
    I think so.. I put H2SO4 cos technically they are acid catalysts.. I think!

    good!!
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    (Original post by CogitoErgoSum)
    good!!
    :ditto:
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    (Original post by rainjan_4now)
    :ditto:
    that one on which line on the mass spec was correct was a little weird...
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    (Original post by CogitoErgoSum)
    that one on which line on teh mass spec was correct was a little weird...
    I worked out the molecular formula using the empirical formula given, and i got 74 or something, and that was the last peak or m/e value on the mass spec, and therefore the empirical formula was the mr.

    It was confusing at first because i read that the mr value is always the last but one peak due to a c13 isotope, and i circled the wrong peak at first- making my answer to that question a very messy one indeed!
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    i just put that neither of the other two would add up.... i had no idea whatsoever on that...
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    (Original post by CogitoErgoSum)
    i just put that neither of the other two would add up.... i had no idea whatsoever on that...
    all types of spectroscopy sucks! We lucked out this year as the correct compound didnt cause anysplitting patterns and you could just say that it was due to "there not being any chemically ajacent protons in the environment"- or something similar
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    (Original post by rainjan_4now)
    all types of spectroscopy sucks! We lucked out this year as the correct compound didnt cause anysplitting patterns and you could just say that it was due to "there not being any chemically ajacent protons in the environment"- or something similar
    ii did okay on the NMR, it was just the mass spec one . yes, we definatly got lucky on the NMR,because it was quite obvious! i talked about "environments" and stuff, too!
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    As a whole, the paper was very easy though
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    (Original post by CogitoErgoSum)
    ii did okay on the NMR, it was just the mass spec one . yes, we definatly got lucky on the NMR,because it was quite obvious! i talked about "environments" and stuff, too!
    I actually sounded quite intellectual (even though it would have been a whole different story if a doublet, triplet etc occured) and i hope to receive my first mark ever for written comunication
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    The only question I was unsure of was how the aluminium chloride was regenerated.

    I reacted it with a methly free radical
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    (Original post by froggymills)
    The only question I was unsure of was how the aluminium chloride was regenerated.

    I reacted it with a methly free radical
    i just reacted it with the hydrogen that was lost whilst substituting it with the other group. I dunno if its right because im not sure if HCL is produced as a by-product, but i put it down anyway :rolleyes:
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    (Original post by rainjan_4now)
    i just reacted it with the hydrogen that was lost whilst substituting it with the other group. I dunno if its right because im not sure if HCL is produced as a by-product, but i put it down anyway :rolleyes:
    yeah thats what i did.

    i checked it in one of my non-ocr specific revision books, and they show the whole process as including that
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    (Original post by Starstrike)
    yeah thats what i did.

    i checked it in one of my non-ocr specific revision books, and they show the whole process as including that
    me, too. i did the same thing. so, yay! thats some more marks..
 
 
 
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