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    I think I got 55. **** my life. That's not even an A
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    (Original post by alevelsarepoo)
    I think I got 55. **** my life. That's not even an A
    It could be an A. This is unofficial so don't trust it 100%. Just concentrate on getting the high marks in chem4 and 5. Good luck
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    (Original post by Cake4breakfast)
    Do you think they will accept 2,2,4 methylpentane instead of 2,2,4 trimethylpentane


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    No sorry. They will specifically look for the tri part.
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    e) Shapes question - SF6 = Octohedral , 90 degrees -SF4 = See-Saw shape. Lone pair on the horizontal plane. Angles 90, 120 or 180 degrees. Probably will accept -2.5 degrees off each angle. (6)

    For this I wrote 118, only -2 degrees off would I get it??
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    (Original post by Chembio123)
    e) Shapes question - SF6 = Octohedral , 90 degrees -SF4 = See-Saw shape. Lone pair on the horizontal plane. Angles 90, 120 or 180 degrees. Probably will accept -2.5 degrees off each angle. (6)

    For this I wrote 118, only -2 degrees off would I get it??
    I wrote that as well
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    (Original post by EmmaHarvard)
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    What u guys think the grade boundaries be??
    January modules when they were around were for the people re taking i believe. looking at the grade boundaries for those, they were lower, around 54.
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    (Original post by Chembio123)
    e) Shapes question - SF6 = Octohedral , 90 degrees -SF4 = See-Saw shape. Lone pair on the horizontal plane. Angles 90, 120 or 180 degrees. Probably will accept -2.5 degrees off each angle. (6)

    For this I wrote 118, only -2 degrees off would I get it??
    (Original post by fasdaman2212)
    I wrote that as well
    I think you will get the mark
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    (Original post by ehaywood)
    I did that too, i dont even remember seeing cu in the question...

    Yh wtf lol and im pretty sure the rest added to 100% as well
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    (Original post by EnterNamehereplz)
    Yh wtf lol and im pretty sure the rest added to 100% as well
    As so many people forgot it (nearly including myself) they'll probably divide the marks differently and give you some for it. The rest didn't add to 100% though as that's how I realised my mistake
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    (Original post by EnterNamehereplz)
    Yh wtf lol and im pretty sure the rest added to 100% as well
    It didnt add to 100%. You missed it out .
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    (Original post by rbkbball)
    January modules when they were around were for the people re taking i believe. looking at the grade boundaries for those, they were lower, around 54.
    I'd love it if they were 54 as I haven't got any better than that but they seem to be getting higher everywhere and last year was 57. Plus, as everyone retaking are A2 students we're expectantly smarter so the average mark will be higher
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    [QUOTE=SirRaza97;65267889]It didnt add to 100%. You missed it out .[/QUOTE

    How much Cu then lol couldnt be higher than 10? one of them 90 ffs I thought avoided all AQA trip up questions fml
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    if i remember correctly For the empirical formula, it mentioned the name of the compound can't remember what it was exactly called but it was 'copper something'. it gave the total mass and then the masses of C, O and H... you had to take the total mass from given mass to find mass of copper. the trick was realising to work out Cu
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    Yeah I just realised relative atomic mass and molecular mass are two different things 😁
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    (Original post by SirRaza97)
    EDIT: Thanks to everyone who has helped in this thread. If anyone can remember the marks for each question I will add them in for you guys! Also the Bold stuff after some thought are probably the correct answers or something along the lines of it. Good luck to everyone in the rest of their exams

    EDIT 2: I've added in marks from what I can remember

    Here is my unofficial mark scheme. Anything in bold I am not sure if it's right. So if you have any idea then please tell me so i can add it! If i have missed anything out then aslo let me know!

    Section A

    1.
    a) Relative Atomic mass Definition (2)
    b) Magnetic Field (1)
    c) - Ions accept electrons -Current is formed which is proportional to abundance (2)
    d) Something like 28.065 for the RAM (3)
    e) Similarity= Peaks still at original m/z values becuase +1 ions are still formed/
    same relative abundance (or same height of peaks) because same sample is used so similar amount of the isotopes are present
    -Difference - Peaks at half the m/z values becasue high energy electrons will produce +2 ions (4)

    2. (Can't rmember what topic this was. I think it was about Van Der Waals)
    a) -Electron Density randomly shifts -Creating areas of +ve and -ve charge on molecule - Attraction between molecules which is intermolecular force/VDW (3)
    b) O-H bond big electronegative difference allows for hydrogen bonds. Hydrogen bonds are stronger than VDW. (3)
    c) Fractional Distiallation/Heat under reflux will sperate these (1)
    d) The Se molecule is larger. This means the VDW forces are stronger between molecules (2)

    3. (Questions about Alkanes?)
    a) Group is alkane (1)
    b) 2,2,4 - trimethylpentane (might accept 2,4,4 - trimethylpentane) (1)
    c) C8H18 + 12.5O2 ------> 9H2O + 8CO2 (2)
    d) but-1-ene (1)
    e) C14H30 (1)
    f) Thermal Cracking. High temp and high pressure (2)
    g) Isomers question. Chain isomer = H2C=C(CH3)2 Postion isomer = But-2-ene Functional Isomer = Cyclic Alkane so cyclicbutane (4)

    4. (The weird reactions and the shapes question?)
    a) Balancing equation I couldn't remember (2)
    b) Cu2(OH)2CO3 + 4HCl -----> 2CuCl2 + 3H2O + CO2 (2)
    c) Effervescense(1)
    d) Cu3O8H2C2 or in the structural form Cu3(CO3)2(OH)2 (4/5)
    e) Shapes question - SF6 = Octohedral , 90 degrees -SF4 = See-Saw shape. Lone pair on the horizontal plane. Angles 90, 120 or 180 degrees. Probably will accept -2.5 degrees off each angle. (6)

    Section B

    5. (Period 3 stuff)
    a) - Ionisation energies increase -Increasing proton number - Similar Shielding -Attraction between outer electron and nuclues gets stronger -The bigger nuclear charge reduces atomic radius (I don't think this point is needed) (4)
    b) -Silicon has highest melting point. -Because of macromolecular/Giant covelant structure. -Strong covelant bonds throughout structure. -Requires high amounts of energy to break. (3)
    c) The 2 elements that you could've choosed from were Aluminuim because removing electron from 3p shell or Sulphur because of pair repulsion in 3p shell. (2/3)
    d) -Element Y is Sulphur. -Large jump in eneries from 6th to 7th ionisation enegies -So 7th electron in inner shell so sulphur must be the element Y. (3)

    6. (Calculations)
    a) 0.113m3 (3 sig figs needed) (3/4)
    b) 1065 Kg or 1.065x106 g (2/3)
    c) Percentage yield = 49.3% (4/5)
    d) Method 1 because its 100% atom economy. Only producing one product. (1)

    Do you think they would accept same no of peaks for 1e?:/
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    [QUOTE=EnterNamehereplz;65268033]
    (Original post by SirRaza97)
    It didnt add to 100%. You missed it out .[/QUOTE

    How much Cu then lol couldnt be higher than 10? one of them 90 ffs I thought avoided all AQA trip up questions fml
    The percentage ratio of Carbon: oxygen: Hydrogen was like

    6.96% : 37.12 % : 0.87%

    so that means there was about 55.05% Cu in the compund.
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    (Original post by emilies18)
    Do you think they would accept same no of peaks for 1e?:/
    No. You are stating that the number of peaks is the same. But there will be 6 peaks. Unlucky dude

    EDIT: Well. There could be same number of peaks if only +2 ions are formed.
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    the empirical formula q was only 3 marks
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    End of the day it doesn't matter if you blipped on this paper - as it carries less ums than the chem4 5 and 2 - so you can still get Your targets - so stop dwelling and focus on these exams now!


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    (Original post by alevelsarepoo)
    I'd love it if they were 54 as I haven't got any better than that but they seem to be getting higher everywhere and last year was 57. Plus, as everyone retaking are A2 students we're expectantly smarter so the average mark will be higher
    Yes, however, it seems to me that not everyone revised as much as they should have, they took the exam lightly and some people in my cohort dropped at least 20 marks

    Remember that this year we don't have the Oxbridge lot, so, it'll still be a normal bell curve. I wouldn't worry!
 
 
 
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