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    Unofficial Markscheme Anyone?
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    (Original post by Project22)
    Definitely higher than 75. Last year was 79 and this years paper was easier. Since only A2 people are doing it my guess would be around 85-86 for an A.
    It's not only A2 people are doing it. I'm doing both AS and A2 and I'm not a resit. Some people from my class will be doing A2 (old specification still) next year.
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    (Original post by AsheColdwater)
    Was the alcohol to alkene a condensation or dehydration reaction?
    Both remove H2O, but I put dehydration because condensation involves the joining of two molecules. Dehydration can apply to just one molecule losing water.
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    (Original post by NiniMCa)
    Both remove H2O, but I put dehydration because condensation involves the joining of two molecules. Dehydration can apply to just one molecule losing water.
    hmm good point
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    (Original post by HediIsLord)
    elimination/dehydration
    Whats the difference between condensation and dehydration/elimination?
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    (Original post by AsheColdwater)
    Whats the difference between condensation and dehydration/elimination?
    I put dehydration and was very close to putting elimination. Dehydration is an example of eliminatiom by removing a molecule so the compound goes from saturated to unsaturated

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    (Original post by Randall13)
    Anyone 259 for the petrol one?
    I got that, I was totally unsure in the exam if it was right, but quite a few people seem to have the same answer.
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    Could some one explain the polymerisation question?? What was the monomer and its Mr??? I got something stupid like 84??
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    Cos it's a ratio of moles not mass
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    (Original post by Randall13)
    Anyone 259 for the petrol one?
    yep!
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    (Original post by TicTockClock)
    Could some one explain the polymerisation question?? What was the monomer and its Mr??? I got something stupid like 84??
    50000/70 = 714
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    (Original post by TicTockClock)
    Could some one explain the polymerisation question?? What was the monomer and its Mr??? I got something stupid like 84??
    Depending on the monomer you got, you did 50,000/mr of monomer

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    (Original post by AsheColdwater)
    Whats the difference between condensation and dehydration/elimination?
    condensation is usually a type of reaction between two molecules no? elimination is solely one molecule/conversion into an alkene from an alcohol

    condensation polymers for example are the product of condensation reactions
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    good luck guys
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    (Original post by TicTockClock)
    Could some one explain the polymerisation question?? What was the monomer and its Mr??? I got something stupid like 84??
    I got that the Mr of the monomer was 84 too but from reading other peoples answers not sure it was right ah dear, my dreams of an A in this paper are shot
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    (Original post by Bethaaaaany)
    I got that the Mr of the monomer was 84 too but from reading other peoples answers not sure it was right ah dear, my dreams of an A in this paper are shot
    Not sure if this is correct?
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    (Original post by Randall13)
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    Not sure if this is correct?
    Oooh yes, that's what I put for the monomer! Why did I get 84, was I just being dim?
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    How many marks was the E/Z isomer question?! Think I drew them in the wrong boxes :/
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    (Original post by Randall13)
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    Not sure if this is correct?
    Isn't there supposed to be CH3 at the top, I'm not sure though.
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    (Original post by TicTockClock)
    Could some one explain the polymerisation question?? What was the monomer and its Mr??? I got something stupid like 84??
    I got this?
 
 
 
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