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    (Original post by pav)
    yeah i thought it would be something like that. So if this question is asked in the exam when you circle the group should we also explain at the bottom why we have circled this particular thing, becuase im thinking of circling just the Ndouble bond N and two arene rings
    I don't think you'd have to explain why... I'd have thought the mark scheme would be to circle the benzene rings and the N to N bond, and it would probably accept if you circled any groups containing delocalised electrons
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    Hey, I was looking at a question about the proton nmr of glycerol. Am I right in saying there are 5 proton environments?

    Thanks
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    Also, for June 2010 paper qu 2d it says t-butanol has instantaneous dipole induced dipole bonds. I would have thought that it woul;d have been hydrogen bonding between the molecules.
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    (Original post by supernovainthesky)
    Hey, I was looking at a question about the proton nmr of glycerol. Am I right in saying there are 5 proton environments?

    Thanks
    I thought glycerol has 4 environments. There are 2 CH2 groups, one at the top of the molecule and one at the bottom. This is one environment. Both of these groups are attached to an OH group which is another environment. Then the CH group in the middle of the molecule is a third environment and the OH attached to it a fourth. Not completely sure though just how I would do it. Can anyone confirm please.
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    Just came across something on the spec I have NO idea about

    Its the uses of ionic liquids. Can someone please explain it to me please. Its come up in an exam before but you just had to define what an ionic liquid is.

    thanks
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    (Original post by tkoki1993)
    Just came across something on the spec I have NO idea about

    Its the uses of ionic liquids. Can someone please explain it to me please. Its come up in an exam before but you just had to define what an ionic liquid is.

    thanks
    I think it means the friedal crafts reactions taking place on ionic liquids as combination solvent catalyst systems. This reduces flamability, solvent emissions allows reactions to take place at lower temperatures and allows any waste materials to be recycled easily. It mentions it in the salters revision guide if you have it.
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    Do we have to know the born haber cycle or can we use the other simpler enthalpy diagram?

    Also Kp and Ksp are no longer in the specification right?
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    (Original post by zahre)
    I think it means the friedal crafts reactions taking place on ionic liquids as combination solvent catalyst systems. This reduces flamability, solvent emissions allows reactions to take place at lower temperatures and allows any waste materials to be recycled easily. It mentions it in the salters revision guide if you have it.
    oh right thanks.
    What page of the revision guide is it on?
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    (Original post by MyJunkIsYou)
    Do we have to know the born haber cycle or can we use the other simpler enthalpy diagram?

    Also Kp and Ksp are no longer in the specification right?
    For most calculation questions, you get full marks if you write just the answer, so I would use whatever enthalpy diagram im comfortable with.
    and yeah Kp and Ksp aren't in the spec anymore.. I just did an old syllabus paper and had a mini heart attack when they came up lol
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    (Original post by zahre)
    I thought glycerol has 4 environments. There are 2 CH2 groups, one at the top of the molecule and one at the bottom. This is one environment. Both of these groups are attached to an OH group which is another environment. Then the CH group in the middle of the molecule is a third environment and the OH attached to it a fourth. Not completely sure though just how I would do it. Can anyone confirm please.
    Yeah thanks I see it! I accidentally put each of the H atoms on the CH2 as being in a different environment
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    (Original post by tkoki1993)
    oh right thanks.
    What page of the revision guide is it on?
    Page 59
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    (Original post by zahre)
    Page 59
    thanks
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    1 and 1/2 days to cover F335. It's squeaky bum time now.
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    (Original post by gozatron)
    1 and 1/2 days to cover F335. It's squeaky bum time now.
    what exactly is squeaky bum time
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    (Original post by tkoki1993)
    what exactly is squeaky bum time
    Phrase for "it's a tense time" haha :teeth:
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    (Original post by MyJunkIsYou)
    Do we have to know the born haber cycle or can we use the other simpler enthalpy diagram?

    Also Kp and Ksp are no longer in the specification right?
    Kp and Ksp aren't on the specification, and neither is the born-haber cycle.
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    Do we have to know about atomic emission spectrums? The questions in the legacy papers include it when talking about paints. Because didn't we do that in the very first AS unit? and I definately made a mental note to never talk about electrons falling when it's those "why is a coloured and b colourless questions" because it cons most of the marks.
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    (Original post by MyJunkIsYou)
    Do we have to know about atomic emission spectrums? The questions in the legacy papers include it when talking about paints. Because didn't we do that in the very first AS unit? and I definately made a mental note to never talk about electrons falling when it's those "why is a coloured and b colourless questions" because it cons most of the marks.
    Yeah you do have to know about atomic emission spectrum. There was a question in the jan 11 paper where it asks you to draw it out and explain why the spectrum for each element is different.
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    (Original post by gozatron)
    Phrase for "it's a tense time" haha :teeth:
    ahhh right... I thought it meant something... COMPLETELY different..... squeaky bum...
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    Does anyone have a copy of jan 11 paper please? :P
 
 
 
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