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OCR Chemistry B (Salters) F334/F335 Exam Thread 2016 (14th/22nd June) watch

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    (Original post by douglaswill)
    Are tangled chains not as easy to slide over each other as cystalline ones?
    Yeah
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    (Original post by Bruhh)
    Yeah
    thanks!
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    (Original post by douglaswill)
    thanks!
    Although crystalline polymers are still quite stiff due to their IM bonds making it harder for chains to slide over each other.
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    (Original post by Marccs)
    Does anyone know the reaction that takes place at the hydrogen electrode ?
    2H+ (aq)+ 2e- --> H2 (g)
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    what did people get for part 3 of the bromine question?
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    (Original post by Kaz_96)
    what did people get for part 3 of the bromine question?
    7. First put it was 1 but then saw it was for 100g instead of 10g of the sample.
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    (Original post by jack.lp.thompson)
    7. First put it was 1 but then saw it was for 100g instead of 10g of the sample.
    I got 7 too, are you confident it's correct?
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    (Original post by chloewilliamsss)
    I got 7 too, are you confident it's correct?
    Got 7 too, so hope it's right
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    For name the type of condensation polymer I put 'ester' rather than poly(ester) will I get it wrong????


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    (Original post by chloewilliamsss)
    I got 7 too, are you confident it's correct?
    I think so. The other people at the top of my class got that too. You would only get one mark for the correct answer anyway. It will depend on the method also.
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    (Original post by Aspire7736)
    Got 7 too, so hope it's right
    My answer was a complete guess of calculations in the last 5 mins of the exam so I'd be utterly amazed if it was, but I trust you guys knew what you were doing
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    (Original post by Kwaks)
    For name the type of condensation polymer I put 'ester' rather than poly(ester) will I get it wrong????


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    I think you may be wrong unfortunately
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    (Original post by Aspire7736)
    I think you may be wrong unfortunately
    Oh well I realised now that I'm on the bus


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    (Original post by chloewilliamsss)
    My answer was a complete guess of calculations in the last 5 mins of the exam so I'd be utterly amazed if it was, but I trust you guys knew what you were doing
    I had to leave it till last. Never seen anything like that before!
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    (Original post by jack.lp.thompson)
    I had to leave it till last. Never seen anything like that before!
    Me either? There had been one about iodine numbers in a previous paper but I don't remember it being that difficult
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    What did you put for the rate equation? Also what did you put for effect on results if the volatile substances are lost. I put it makes the rate appear faster than it actually is.....


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    I got 195 for that part 3 LOL the bromine q entirely was v tricky
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    What answers did you put for the 5 marker about the red brown precipitate and rusting?
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    (Original post by Kaz_96)
    what did people get for part 3 of the bromine question?
    Name:  ImageUploadedByStudent Room1465914108.799780.jpg
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    I put this. Got full marks i think.


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    (Original post by Kaz_96)
    I got 195 for that part 3 LOL the bromine q entirely was v tricky
    I got 195 for the 1st 2 marker of the bromine numbers questions
 
 
 
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