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    (Original post by ELCRE)
    Guys would it be silly to make an official complaint to aqa? Some questions were just not fair such as the stitches one. Aqa are really playing with lives, they changed the wording and format of questions for the chem unit 2 paper (chucked in isa & Empa questions as well as one unit 5 question) & I let it go because I thought oh they mustve done it because its a resit paper but they have no excuse for this one.


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    Seems to be a good idea..how do we do that?
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    I'm just gonna become a bricklayer
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    Can I ask people how they think they've done in this comparative to their past paper performances? I'm just interested.
    Literally I got 85+ in all the past papers but I'm fairly certain I'll be lucky to get 70 in this one
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    (Original post by House6797)
    naa

    the question was 'what is the relationship between the two chiral compounds'
    ANSWER: They are non super imposable mirror images of each other
    I thought I was going crazy.
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    (Original post by rimstone)
    yeah there is 0 change i could get an A* or even an A. . A* might be too much, but 3 hours and i could getan A easy.
    This sounds stupid and arrogant i know ; Im not some really smart person, just average really; but i mean i was honestly really ready for this exam, i understood every topic really well, did all past papers, and some from my school. I could answer every one, all the equations were easy, and what i found hard was the N.M.R questions where you have to draw the molecule, but i revise for it a lot, did every single past paper Q and after doing 2 , it clicked and i could do it . I honestly cant stress how ready i was for this exam, i knew how everything was made, the condition, reagents, I knew all the Buffer,Acid,Equal, question by heart, i havent failed a single one of those Q's. The kinetic my good, thats easy. In the exam it took me no time to do it . I honestly pissed, since this is the first time in my life, i went full on revision on an exam and was really ready for it, but i just flopped it so bad .. last year with last min revision i did better . I really wanted a A/ B min , and i put all the effort into it. Revised well before the exam, did every past paper, incase there a few werid Q's, did all teh work my teacher gave and got as much help as he would offer ..... I was ready for this and when i saw the exam, it looked easy enough, though some easy Q's from past paper werent there, E.G: water PH , Buffers .. where the **** were the 2 4/5 mark buffer Q's ? .. even then i wasn't really having any difficulty with the exam .. i just ran out of time, which is 100% my fault .. but this is the first exam ive done, where i ran out of time, usually i finish 10 mins early or more.
    30 ish marks lost given that everyone thinks it was the worst paper ever could be well into a B grade maybe even a Low A if youre lucky - so you can salvage it to an A* or an A.

    The grade boundaries are likely to be their lowest ever since it was the hardest ever paper - try not to worry too much it was a ridiculous paper and everyone found it shocking
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    (Original post by mgill17)
    Can I ask people how they think they've done in this comparative to their past paper performances? I'm just interested.
    Literally I got 85+ in all the past papers but I'm fairly certain I'll be lucky to get 70 in this one
    Literally same
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    (Original post by rimstone)
    yeah there is 0 change i could get an A* or even an A. . A* might be too much, but 3 hours and i could getan A easy.
    This sounds stupid and arrogant i know ; Im not some really smart person, just average really; but i mean i was honestly really ready for this exam, i understood every topic really well, did all past papers, and some from my school. I could answer every one, all the equations were easy, and what i found hard was the N.M.R questions where you have to draw the molecule, but i revise for it a lot, did every single past paper Q and after doing 2 , it clicked and i could do it . I honestly cant stress how ready i was for this exam, i knew how everything was made, the condition, reagents, I knew all the Buffer,Acid,Equal, question by heart, i havent failed a single one of those Q's. The kinetic my good, thats easy. In the exam it took me no time to do it . I honestly pissed, since this is the first time in my life, i went full on revision on an exam and was really ready for it, but i just flopped it so bad .. last year with last min revision i did better . I really wanted a A/ B min , and i put all the effort into it. Revised well before the exam, did every past paper, incase there a few werid Q's, did all teh work my teacher gave and got as much help as he would offer ..... I was ready for this and when i saw the exam, it looked easy enough, though some easy Q's from past paper werent there, E.G: water PH , Buffers .. where the **** were the 2 4/5 mark buffer Q's ? .. even then i wasn't really having any difficulty with the exam .. i just ran out of time, which is 100% my fault .. but this is the first exam ive done, where i ran out of time, usually i finish 10 mins early or more.
    15 marks dropped is an A* like seriously - that's the highest grade you can get so be happy and positive


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    (Original post by Boundless_x)
    Me tooooo (
    Everyone is discussing the final structure but I only managed to figure out half of it before the invigilator told us to put our pens down...
    Not to worry most of the marks come from the working out


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    Why is pKa not in the text book?


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    (Original post by 26december)
    So I resat this paper (3rd year of A-Levels) and it's safe to say it's been a pointless 3 years considering I won't even get into university now


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    your not alone last chance hope I havent blown t would be so gutted
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    (Original post by FormlessBowl)
    30 ish marks lost given that everyone thinks it was the worst paper ever could be well into a B grade maybe even a Low A if youre lucky - so you can salvage it to an A* or an A.

    The grade boundaries are likely to be their lowest ever since it was the hardest ever paper - try not to worry too much it was a ridiculous paper and everyone found it shocking
    I domt think the grade boundaries will change that much (84 or 85 for a* imo) because the gorvernment thinks that too many people are getting a*s and a's.
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    question. you know part 8a.
    I forgot what the last mark was for.
    I put NaOH
    Heat under reflux
    then animal fats...? (i thought it was where could you find something similar to....idk tbh.
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    (Original post by ELCRE)
    Guys would it be silly to make an official complaint to aqa? Some questions were just not fair such as the stitches one. Aqa are really playing with lives, they changed the wording and format of questions for the chem unit 2 paper (chucked in isa & Empa questions as well as one unit 5 question) & I let it go because I thought oh they mustve done it because its a resit paper but they have no excuse for this one.


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    Yes make one! In 2010 I think Aqa did something very similar for the unit 4 biology exam. They also made a facebook page and everyone 'liked it'. Result: grade boundaries were very low!
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    The was a past paper previously that said the same sort of thing, the answer in this case is that it has polar regions eg C=O or whatever it was, and bacteria are able to digest those parts of the molecule and break it up, hence it will break off after some time which prevents pain and reopening of the wound from taking out the stitches early or poorly
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    18:30- Updated- Version 2

    18:12 Attempting version 1 of the unoffical mark scheme, will keep quoting this for others to see, may even start a thread. Please contribute i will update frequently before i start studying for my bio exam day after tomorrow heh rip

    Misc: tell me where these go!!!

    Equation representing ethanoic acid as a base with nitric acid:
    CH3COOH + HNO3 -> CH3CO+NO3- + H2O

    Identify what reagents are needed to distinguish between the two chlorine molecules, incl. observation. (Acyl chloride vs haloalkane (?))
    Reagent: water/AgNO3 (?)/named carbonate
    Observation: HCl fumes/White ppt./Effervescence -for the acyl chloride.

    Which Nitrogen acts as a stronger base a vs. b (where a is attached to the benzene, and b is a tertiary amine) and why?
    Nitrogen b due to the positive inductive effect of the carbons on the nitrogen, therefore making the lone pairs more available. Consequently nitrogen a is joined to a benzene so the lone pair delocalises into the benzene ring.

    Order of reactions:
    D 1
    E 2

    What is a racemic mixture?
    Mixture containing equal quantities of each enantiomer.

    How to distinguish between the two:
    Expose to plane polarised light, rotates in opposite directions

    Chiral Carbon relationship:
    They are both mirror images of each other/enantiomers.

    4.
    Electrophile structure: CH3C(+)O

    Reaction mechanism:
    Arrow from benzene ring to C+ in CH3C(+)O, then arrow from hydrogen attached to the same carbon as the CH3CO back into the incomplete benzene ring (from carbon 1-4 i believe).

    5. Can't remember exact questions, let me know i'll update ! =)
    Notes:
    Zwitterions have R-N(+)H3 and a COO-
    Hydrogen bond between two amino acids: presumably show any partial bond from one hydrogen on one amino acid to either the nitrogen or oxygen on the other.
    Dipeptides- essentially amides formed from 2 amino acids.

    Advantage of using the polyester suture rather than the polyalkene?
    the ester bond in polyester can hydrolyse whereas polyalkene C-C, C-H bonds are too strong thus cannot. Therefore the former can dissolve naturally whereas the former would require manual removal.

    7. Conc. Of propanone increases by 100, What is the new rate equation and explain pls:
    rate = k[H+]Due to the large excess of propanone, it is no longer affecting the rate as only the H+ concentration limits the speed at which the reaction proceeds.

    Why is the initial rate of the reaction used to determine the order of the reactants rather than at any other point during the reaction? Or something
    Initial rate takes into account the initial concentration of the reactants which is more accurate since, as the reaction proceeds the concentrations of the different species change. (?)

    How do you calculate the initial rate of the reaction from a graph of concentration against time?
    Calculate the gradient of the tangent to the slope. (?)

    8. Organic synthesis to produce the branched primary amine:
    Structure: Same as previous however Br is substituted with CN
    Step 3: KCN w/ ethanol (?)
    Step 4: H2/Ni, LiAlH4

    Question 9 Notes (I don't even need to say the question, everyone knows this question by the number... eek)
    Potassium dichromate turns green, either a primary or secondary alcohol, or aldehyde
    O-H absorption in the Mass spec
    O-H in NMR spectrum, singlet obvs
    CH3-O present in NMR spectrum, singlet
    RCH2 in NMR spectrum, triplet ?
    R(CH3)2 in NMR spectrum, doublet ? uh pls halp don't remember values
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    (Original post by Ljm1998)
    The was a past paper previously that said the same sort of thing, the answer in this case is that it has polar regions eg C=O or whatever it was, and bacteria are able to digest those parts of the molecule and break it up, hence it will break off after some time which prevents pain and reopening of the wound from taking out the stitches early or poorly
    But didn't it ask why the stitches with the polar bonds were better?
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    (Original post by Watafuk)
    I domt think the grade boundaries will change that much (84 or 85 for a* imo) because the gorvernment thinks that too many people are getting a*s and a's.
    Theres absolutely no way they arent going down - theyve been saying too many people get the top grades for years and in the past few years hard papers have still resulted in lowered boundaries, this paper was as hard as they come.
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    (Original post by Watafuk)
    I domt think the grade boundaries will chhange that much (84 or 85 for a* imo) because the gorvernment thinks that too many people are getting a*s and a's.
    Aqa set their A*'s at 90% UMS, and after that the grade boundaries for an A are the total pupils scored below A* and find the 10% then again for BCand D, yet I will make a petition, where should I put it? Change.org? Or Facebook?
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    (Original post by lucifer9898)
    Yes make one! In 2010 I think Aqa did something very similar for the unit 4 biology exam. They also made a facebook page and everyone 'liked it'. Result: grade boundaries were very low!
    You are a genius
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    I'm really disappointed with how this exam has turned out. It turns out that learning all the content and doing all the papers isn't enough to do well in exams set by aqa anymore
    Being asked random questions like the one about why you'd use the hydrochloride salt over the lidocaine doesn't do justice to those who worked hard and were doing well on papers like last year when there was a decent number of mechanisms and the questions actually made use of chemistry, rather than asking questions that have a tenuous link to chemistry

    If the grade boundaries aren't low enough to reflect the ridiculousness of the paper, I really hope aqa feel shame, because they'll have denied some very capable candidates their rightful university choices, while those who did little work and got lucky end up getting the higher UMSs

    You can still fix this, AQA
    It's not too late
    Make sure the grade boundaries reflect the difficulty of this exam


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