Just one sec...
Hey! Sign in to get help with your study questionsNew here? Join for free to post

OCR Chemistry A F324 Rings, Polymers and Analysis Tue 19 June 2012

Announcements Posted on
Help us uncover the truth about exam cheats – is cheating ever ok? What if you wouldn't get caught? 27-06-2016
    Offline

    ReputationRep:
    What are the conditions needed for nitartion of benzene?
    Offline

    ReputationRep:
    (Original post by Fatima0065)
    yep go on u start
    right
    Define: isoeletric point (2)
    Define:zwiterrion (1)
    and what happens if glycine is PH 1.6(2)
    Offline

    ReputationRep:
    (Original post by otrivine)
    right
    Define: isoeletric point (2)
    Define:zwiterrion (1)
    and what happens if glycine is PH 1.6(2)
    oh i'm not good at teh definition but okai:
    isolectric point: the point at which an amino acid acts as a zwitterion

    zwiterrion: has no overall charge. the cooh group is acidic so loses a H+ and the nh2 is basic therefore gains a H+

    if glyicine is at ph 1.6: it froms an NH3+ ion ??? (not sure)
    Offline

    ReputationRep:
    Definition for optical isomer:?

    Why is it important that when forming a diazonium ion the temp is under 10C?
    Offline

    ReputationRep:
    (Original post by Fatima0065)
    oh i'm not good at teh definition but okai:
    isolectric point: the point at which an amino acid acts as a zwitterion

    zwiterrion: has no overall charge. the cooh group is acidic so loses a H+ and the nh2 is basic therefore gains a H+

    if glyicine is at ph 1.6: it froms an NH3+ ion ??? (not sure)
    Good just the last part yes it forms NH3+ and forms C00-
    Offline

    ReputationRep:
    (Original post by Fatima0065)
    Definition for optical isomer:?

    Why is it important that when forming a diazonium ion the temp is under 10C?
    optical isomer is where a carbon atom is attached to 4 other atoms/groups chiral carbon

    it is important as it has to be its conditions and not to cause any side affects/not sure
    Offline

    ReputationRep:
    (Original post by otrivine)
    Good just the last part yes it forms NH3+ and forms C00-
    why coo- isn't that jsu in the alkaline conditions?
    Offline

    ReputationRep:
    (Original post by otrivine)
    optical isomer is where a carbon atom is attached to 4 other atoms/groups chiral carbon

    it is important as it has to be its conditions and not to cause any side affects/not sure
    first one's correct but
    2nd one: because the N2+ is unstable so any temp above 10c it would decompose to form phenol, n2 and h20
    Offline

    ReputationRep:
    (Original post by Fatima0065)
    why coo- isn't that jsu in the alkaline conditions?
    that was exactly what i was thinking but saw the jan 2012 paper and so for PH 1.6 they did NH3+ and COO-
    Offline

    ReputationRep:
    (Original post by fatima0065)
    first one's correct but
    2nd one: Because the n2+ is unstable so any temp above 10c it would decompose to form phenol, n2 and h20
    thanks i did not know that
    Offline

    ReputationRep:
    in the presnece of excess ammonia when ffromig a halogenalkane which two products are formed
    soory thats worded wrong excess amonia to a halogen alkane..what two products are formed?
    Offline

    ReputationRep:
    (Original post by otrivine)
    thanks i did not know that
    no problem
    Offline

    ReputationRep:
    (Original post by otrivine)
    that was exactly what i was thinking but saw the jan 2012 paper and so for PH 1.6 they did NH3+ and COO-
    oh do u know why?
    Offline

    ReputationRep:
    (Original post by Fatima0065)
    in the presnece of excess ammonia when ffromig a halogenalkane which two products are formed
    soory thats worded wrong excess amonia to a halogen alkane..what two products are formed?
    oh my i have not revised that part yet is this chapter 1 ?
    Offline

    ReputationRep:
    otrivine..ur turn...
    Offline

    ReputationRep:
    (Original post by Fatima0065)
    oh do u know why?
    No to be honest ? but i just learned it has to be NH3+ AND COO - ?
    Offline

    ReputationRep:
    (Original post by Fatima0065)
    otrivine..ur turn...
    What are they doing to polymers to prevent landfill sites (2)
    Offline

    ReputationRep:
    (Original post by otrivine)
    oh my i have not revised that part yet is this chapter 1 ?
    its part of the page on amines
    Offline

    ReputationRep:
    (Original post by otrivine)
    What are they doing to polymers to prevent landfill sites (2)
    Making the biodegradable and photodegradable?
    Offline

    ReputationRep:
    Why is TMS used for proton NMR?

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: June 9, 2014
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Poll
Who would make the best Labour leader now?

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.