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    (Original post by fletchdd02)
    making them from their monomers and the hydrolysis of them
    I mean do we need to know specific examples such as Terylene, Nylon-6,6 and Kevlar?
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    (Original post by MathsNerd1)
    That's not too bad and if its to draw it then I'll get all the marks with my eyes closed
    wow! you are a confident cookie

    I am sure you will be fine!!
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    (Original post by D4rth)
    We all went to sleep :P

    J/K, what solubility question? I answered quite a few before.

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    Whether C6H5COOH or C7H15COOH is more soluble.
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    (Original post by _HabibaH_)
    June 2012 was the best. I can't believe I didn't pay attention in chem in A2. :mad:
    Oh yes good thing you mentioned that you know the question on benzaldeyde and the last one where we had draw it? why was 2 benzenes involved
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    (Original post by otrivine)
    wow! you are a confident cookie

    I am sure you will be fine!!
    Are you still working otrivine?! Go to sleep dude/dudette, you've been working really hard and know pretty much everything, get a good nights sleep!!!!!!!!

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    (ii) The esters would have similar retention times
    AND
    similar structures/molecules OR same functional groups
    OR similar polarities OR similar solubilities 
    Alcohol would have short retention time
    AND
    alkane would have long retention time 


    does anyone know why that is? (bold)
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    (Original post by _HabibaH_)
    How they are made - so their condensation reactions
    The functional group formed for each type of condensation reaction
    Maybe the main examples shown in the book - if its in the spec
    Their implications - so carbon neutral, less litter, less harmful gases
    Isomerism - optical in these ones
    Difference between synthetic and natural - what does this result in?
    The products formed from hydrolysis by acid/alkali
    The conditions or each type of hydrolysis

    THAT'S ALL I CAN THINK OF RIGHT NOW.
    Thanks for the list.
    So it would be useful to know specific examples,just in case?
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    (Original post by otrivine)
    wow! you are a confident cookie

    I am sure you will be fine!!
    Its just too easy though, not the whole unit though
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    (Original post by Varsh05)
    Thanks for the list.
    So it would be useful to know specific examples,just in case?
    I don't know if its in the spec but it wouldn't hurt to know Kevlar/Terylene/PLA's properties and type of reaction. The reactants they should give you.
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    (Original post by D4rth)
    Are you still working otrivine?! Go to sleep dude/dudette, you've been working really hard and know pretty much everything, get a good nights sleep!!!!!!!!

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    I am cant sleep too worried
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    (Original post by _HabibaH_)
    Whether C6H5COOH or C7H15COOH is more soluble.
    Oh right this question, they're quite similar, but since we don't have an answer and its made up I wouldn't want to say something and it end up being wrong. But I THINK the benzene would be more soluble as there's less carbons, therefore less electrons meaning less vdw forces so less of the molecule would be insoluble making it more soluble.

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    (Original post by _HabibaH_)
    June 2012 was the best. I can't believe I didn't pay attention in chem in A2. :mad:
    I thought the last NMR question was quite difficult on June 2012.
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    (Original post by otrivine)
    Oh yes good thing you mentioned that you know the question on benzaldeyde and the last one where we had draw it? why was 2 benzenes involved
    F325 or F324?
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    (Original post by MathsNerd1)
    Its just too easy though, not the whole unit though
    good I am sure you will be fine!!
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    I'm off now guys, best of luck for tomorrow everyone! We'll all do fantastic!
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    (Original post by _HabibaH_)
    F325 or F324?
    You had to use two benzenes because there was two CH3s since it was CH3COCH3 so the CH3 on the other side would react with another benzene
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    (Original post by MathsNerd1)
    I'm off now guys, best of luck for tomorrow everyone! We'll all do fantastic!
    Good Luck!
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    (Original post by simifeltham)
    You had to use two benzenes because there was two CH3s since it was CH3COCH3 so the CH3 on the other side would react with another benzene
    which question this? I'm confused.
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    (Original post by JimmyA*)
    I thought the last NMR question was quite difficult on June 2012.
    Oh I was talking about F325 with Otrivine. But yes the June 2012 last question I couldn't do it in the exam...I hardly understood NMR then though - I basically skipped it :/
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    (Original post by D4rth)
    Oh right this question, they're quite similar, but since we don't have an answer and its made up I wouldn't want to say something and it end up being wrong. But I THINK the benzene would be more soluble as there's less carbons, therefore less electrons meaning less vdw forces so less of the molecule would be insoluble making it more soluble.

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    Okay. Otrivine and I were confused between that explanation and the 'Benzene being less reactive due to the delocalised system of electrons' explanation.
 
 
 
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