Hey there! Sign in to join this conversationNew here? Join for free
    Offline

    1
    ReputationRep:
    (Original post by lyricalvibe)
    It is but did they mention they added water though? I just did the me hnism for nucleophilic addition leaving the anion produced as it were

    Posted from TSR Mobile
    I believe they stated that it was in a dilute acid so the product would have either received the hydrogen from H+ or from the water molecule.
    Offline

    2
    ReputationRep:
    (Original post by IBerrr)
    Look at the pic of the isomers for that answer I sent in this thread.
    I have
    Offline

    0
    ReputationRep:
    (Original post by millss)
    the grade boundaries are already out?? where?? i thought they only made them once all the papers had been marked
    That's what I thought, I can't find it anywhere only 2015! Im so confused... :confused:
    Offline

    2
    ReputationRep:
    (Original post by ezaraf)
    4 points:
    1. what a sh** paper
    2. i got got got 2 e/z isomers
    3. what is the type of copolymerisation
    4. definitely a sh** paper
    Copolymerisation is polyester
    Offline

    13
    ReputationRep:
    (Original post by lyricalvibe)
    It is but did they mention they added water though? I just did the me hnism for nucleophilic addition leaving the anion produced as it were

    Posted from TSR Mobile
    No didn't need water, it said acidic in the question, I added it just to show what is happening. So this is correct yeah
    Offline

    3
    ReputationRep:
    (Original post by ShalomieR)
    That's what I thought, I can't find it anywhere only 2015! Im so confused... :confused:
    im fairly sure they have to look at how the whole country performed and then work them out based on percentiles??? like normally they come out the day before results day
    Offline

    2
    ReputationRep:
    (Original post by ShalomieR)
    That's what I thought, I can't find it anywhere only 2015! Im so confused... :confused:
    The real OCR grade boundaries for this exam have not been produced yet - the exam hasn't been marked so you're not going to find any real grade boundaries. People have, however, estimated the rough grade boundaries by the relative difficulty though of course, until OCR publish the real grade boundaries, these are just 'theory'.

    UMS boundaries however don't change much if at all from year to year (I think) so basically it's saying how many UMS points you get for a certain grade e.g. 80 UMS for an A grade.
    Offline

    13
    ReputationRep:
    Last year an A was 65, this year it would be max 64 ... and minimum 62 ish ... what do you guys think?
    Offline

    1
    ReputationRep:
    I think they meant the UMS grade boundaries are out, which is the same every year, just taking a guess though tbh
    Offline

    2
    ReputationRep:
    (Original post by _MAT_)
    Copolymerisation is polyester
    ugh thats so stupid, why did have to ask it that way >
    Offline

    2
    ReputationRep:
    (Original post by ezaraf)
    ugh thats so stupid, why did have to ask it that way >
    Bit of a strange question, I doubt many will have got that right
    Offline

    0
    ReputationRep:
    (Original post by _MAT_)
    The real OCR grade boundaries for this exam have not been produced yet - the exam hasn't been marked so you're not going to find any real grade boundaries. People have, however, estimated the rough grade boundaries by the relative difficulty though of course, until OCR publish the real grade boundaries, these are just 'theory'.
    Thank you so much I was freaking out and thought they were going to do something completely different this year!!
    Offline

    2
    ReputationRep:
    (Original post by ShalomieR)
    Thank you so much I was freaking out and thought they were going to do something completely different this year!!
    Ahahah I suspect there's a large delay between the papers being done and people actually starting the marking to prevent leaking of the mark scheme?
    Offline

    13
    ReputationRep:
    I did one of the drawings in pencil would they still see it?
    Offline

    2
    ReputationRep:
    (Original post by Kira Yagami)
    I did one of the drawings in pencil would they still see it?
    Yes in fact they ask for drawing in HB pencil

    If you look at the examiner report for last year, one of the issues was examiners still being able to see rubbed out pencil so unless you have a really thin pencil (I don't know how you say it) it'll be fine.
    Offline

    14
    ReputationRep:
    (Original post by Kira Yagami)
    No didn't need water, it said acidic in the question, I added it just to show what is happening. So this is correct yeah
    Ah ok, don't usually read context to save time :/ yeah the the product is correct but shouldn't the lone pair of electrons have come from the nitrogen?

    Posted from TSR Mobile
    Offline

    14
    ReputationRep:
    (Original post by Kira Yagami)
    Last year an A was 65, this year it would be max 64 ... and minimum 62 ish ... what do you guys think?
    I thinkas long as it's below 64 I will scrape an A, hbu?

    Posted from TSR Mobile
    Offline

    13
    ReputationRep:
    (Original post by lyricalvibe)
    Ah ok, don't usually read context to save time :/ yeah the the product is correct but shouldn't the lone pair of electrons have come from the nitrogen?

    Posted from TSR Mobile
    No. The lone pair is on the Carbon.
    Offline

    13
    ReputationRep:
    Offline

    14
    ReputationRep:
    (Original post by Kira Yagami)
    No. The lone pair is on the Carbon.
    I don't even know why I was so sure it was the other way round, I've made so many errors like that, how many marks was the Q?

    Posted from TSR Mobile
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Would you like to hibernate through the winter months?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.