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Edexcel paper 2 chem unofficial mark scheme Watch

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    (Original post by glad-he-ate-her)
    They are technically in different hydrogen environments but the difference is insignificant and they overlap so we can consider them to be the same
    so you're saying that the answer I put is right...? I know on chemguide it says the same as you've said
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    (Original post by Hazzagriff)
    so you're saying that the answer I put is right...? I know on chemguide it says the same as you've said
    I dont know, depends on the mark scheme, but id imagine youd lose maybe 2 out of 6 for that,provided the rest is right
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    (Original post by MaxA2C)
    Anyone else convert Kpa to P so ended up getting a mass of 21,970 g for the Nitrogen/Ideal Gas Equation question?
    No you forgot to times volume by 10 to the minus 3 to get it in m cubed, we all did the kpa to pa conversion
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    (Original post by glad-he-ate-her)
    No you forgot to times volume by 10 to the minus 3 to get it in m cubed, we all did the kpa to pa conversion
    ah damn, will that lose me just one mark or the whole thing?
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    (Original post by glad-he-ate-her)
    I dont know, depends on the mark scheme, but id imagine youd lose maybe 2 out of 6 for that,provided the rest is right
    There was a multiple choice question on 13C NMR where the options were 5,6,7 or 8 peaks. If the benzene are all in the same chemical environment, then that question would have less than 5 peaks as far as I remember. Btw what was your answer for that question?
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    (Original post by AhnafR)
    There was a multiple choice question on 13C NMR where the options were 5,6,7 or 8 peaks. If the benzene are all in the same chemical environment, then that question would have less than 5 peaks as far as I remember. Btw what was your answer for that question?
    Got 6 for the 13C one but for the proton 6 marker as the benzene is treated as one I got 5,3 and 5,2,1
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    (Original post by AhnafR)
    There was a multiple choice question on 13C NMR where the options were 5,6,7 or 8 peaks. If the benzene are all in the same chemical environment, then that question would have less than 5 peaks as far as I remember. Btw what was your answer for that question?
    6 i got
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    For test for Br ions was it silver nitrate and nitric acid and cream precipitate formed?
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    (Original post by AhnafR)
    For test for Br ions was it silver nitrate and nitric acid and cream precipitate formed?
    yeah
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    (Original post by glad-he-ate-her)
    yeah
    Apparently there's another one where you dissolve it in hexane and an orange layer forms?
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    (Original post by AhnafR)
    Apparently there's another one where you dissolve it in hexane and an orange layer forms?
    Ive heard of that as well i think but it probably wont be on ms and isnt in our syllabus
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    I converted everything in the idea gas equation correctly but I got 1,070,000g. I'm not really sure where i went wrong.
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    (Original post by Hazzagriff)
    Are you definitely sure about the proton nmr? In the new spec paper 2 there's a question on completing a nmr spectrum and it gives you the benzene hydrogens as a single peak with intensity 5... For for phenylethanal I got 3 peaks 5 to 2 to 1 singlet to doublet to triplet and for phenylethanone I got 5 to 3 singlet to singlet... anyone else?
    I got exactly this!
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    What did you put for the reason that nitrogen is bigger than oxygen. also isnt that supposed to be paper 1.
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    (Original post by constantinwaquet)
    What did you put for the reason that nitrogen is bigger than oxygen. also isnt that supposed to be paper 1.
    Yeah,smaller nuclear number, weaker electrostatic attraction- larger ion- is paper 1
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    (Original post by MaxA2C)
    ah damn, will that lose me just one mark or the whole thing?
    Probably one
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    how many marks was the Nitrogen mass question? i got like 0.01g somehow?? whoops
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    (Original post by llama101)
    how many marks was the Nitrogen mass question? i got like 0.01g somehow?? whoops
    2 or 3
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    (Original post by emelinaw)
    I got around 89 kjmol-1 for the activation energy, would I lose loads of marks 😬
    they have a range idk how wide it is but should get most of marks for graph and axis and working out
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    For the activation energy question I got around -7000 as my gradient and therefore got +53.97kj for my activation energy. I also got 10.11g for the mass of nitrogen using the pv=nRT. A lot of my friends got similar answers!
 
 
 
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