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    Do i need to know how terylene, kevlar, poly lactic acid and nylon6,6 are made?
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    Compound A has a aldehyde group that gets oxidised to COOH by tollens reagent.
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    (Original post by otrivine)
    Thank you



    OMG! I dont know what else I can do
    Lol same. I'm literally just sat here going through this thinking maybe I should be recalling stuff instead of discussing on here and then I'm like 'forget that, this is more fun'.
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    (Original post by Sinkim)
    Do i need to know how terylene, kevlar, poly lactic acid and nylon6,6 are made?
    They will give you the monomers and ask you to draw it at most nothing special
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    (Original post by _HabibaH_)
    Lol same. I'm literally just sat here going through this thinking maybe I should be recalling stuff instead of discussing on here and then I'm like 'forget that, this is more fun'.
    I know right how did you find f325?

    you know in the Jan 2013 paper, the electrophilic sub, I did the NO2 in the carbon 1 like and the CH3COOH in carbon 3, does it mean the same thing
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    is this exam 1 hour or 1 hr 15 mins?
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    (Original post by Sinkim)
    Do i need to know how terylene, kevlar, poly lactic acid and nylon6,6 are made?
    Nylon-6,6 and Kevlar are Polyamides - so condensation reaction
    Poly(Lactic Acid) and Terylene are Polyesters - so, again, condensation reaction
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    any tips for predicting the impurity formed? HArd question for me
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    (Original post by _HabibaH_)
    Lol same. I'm literally just sat here going through this thinking maybe I should be recalling stuff instead of discussing on here and then I'm like 'forget that, this is more fun'.
    What do we need to know on polyesters and polyamides?
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    (Original post by otrivine)
    I know right how did you find f325?

    you know in the Jan 2013 paper, the electrophilic sub, I did the NO2 in the carbon 1 like and the CH3COOH in carbon 3, does it mean the same thing
    Yep as long as there's a difference of one between both positions.

    I found it slightly tricky on places and I don't think I did as well as I'd hoped to have done - silly errors etc.
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    (Original post by otrivine)
    No, I dont want diagram I need in words
    Okay so basically you begin with a benzene ring that attracts an electrophile which forms an intermediate that breaks the delocalised benzene ring because of the bond with the electrophile, this then donates the pair of electrons to reform the benzene ring and there you go in very basic terms. Care to go into more detail for me?
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    anyone want to revise with some questions? Or is everyone set
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    (Original post by _HabibaH_)
    Yep as long as there's a difference of one between both positions.

    I found it slightly tricky on places and I don't think I did as well as I'd hoped to have done - silly errors etc.

    It was such a good paper for Jan 2013, I think ours is hard
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    (Original post by _HabibaH_)
    Maybe it was too below par for those genius', who knows.
    We all went to sleep :P

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

    Posted from TSR Mobile
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    Any one else staying up late? I know I should sleep buy even though I've revised I can't get to sleep so might as well do some revision!
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    (Original post by MathsNerd1)
    Okay so basically you begin with a benzene ring that attracts an electrophile which forms an intermediate that breaks the delocalised benzene ring because of the bond with the electrophile, this then donates the pair of electrons to reform the benzene ring and there you go in very basic terms. Care to go into more detail for me?
    what you said is sufficient for 3 marks

    and more likely they would ask you to draw it.
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    (Original post by Varsh05)
    What do we need to know on polyesters and polyamides?
    making them from their monomers and the hydrolysis of them
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    (Original post by Varsh05)
    What do we need to know on polyesters and polyamides?
    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.
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    (Original post by otrivine)
    what you said is sufficient for 3 marks

    and more likely they would ask you to draw it.
    That's not too bad and if its to draw it then I'll get all the marks with my eyes closed
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    (Original post by otrivine)
    It was such a good paper for Jan 2013, I think ours is hard
    June 2012 was the best. I can't believe I didn't pay attention in chem in A2. :mad:
 
 
 
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