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    (Original post by yarshad)
    Why does P4O10 have a lower melting point than Si02?
    P4O10 simple molecule. doesnt take much heat energy to break weak VDW intermolecular forces
    SiO2 is giant covalent (Macromolecular) structure so it takes vast amount of heat energy to break all the strong covalent bonds between atoms.

    (Original post by Croydon'Stepper)
    I have no idea. I said it uses electricity from the mains which is created using fossil fuels.
    It was being recharged whihc meant an external voltage needed to be applied, which uses energy from the combustion of fossil fuels so youre right.
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    Lots of quite strange questions but overall it was quite a nice paper I think! Needed a D on that paper to get the A so I am quite confident! I will happily help someone start an unofficial mark scheme if anyone is up to it!
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    What's the overall feel of the paper?
    I didn't sit it because i'm stuck in hospital.
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    (Original post by SuziieB)
    Guys I just calculated that I need 75 ums to get an A. What mark could that be??

    (Please, be a C, please be a C...)

    Posted from TSR Mobile
    75 UMS is a C, 62.5%.
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    Grade boundary predictions ?
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    (Original post by erniiee)
    I don't know why people are implying that they wouldn't accept CO32- and Cl- as even without the other ions these are the overall equations?

    The reagent is Na2CO3, but the reaction is between the carbonate ion and the complex, the sodium ions/protons of HCl are just spectators.

    Highly doubt there will be any marks lost for not showing them!



    This
    I wrote both for each reaction.. will i still get the marks?
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    When the question asked to draw the cobalt thing with these ligands substituted in?

    Is the cordination number with 1,2 ethandiamine ligands 3??
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    (Original post by Divergent)
    What's the overall feel of the paper?
    I didn't sit it because i'm stuck in hospital.

    will you do the paper another time? or?
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    (Original post by AndyMacCormick)
    Lots of quite strange questions but overall it was quite a nice paper I think! Needed a D on that paper to get the A so I am quite confident! I will happily help someone start an unofficial mark scheme if anyone is up to it!
    Good for you!
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    (Original post by yarshad)
    When the question asked to draw the cobalt thing with these ligands substituted in?

    Is the cordination number with 1,2 ethandiamine ligands 3??
    co-ordination number is 6, it didnt ask for the co-ordination number?
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    (Original post by SuziieB)
    Guys I just calculated that I need 75 ums to get an A. What mark could that be??

    (Please, be a C, please be a C...)

    Posted from TSR Mobile
    It is a C
    I need 74 (depends on the ISA though)
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    (Original post by yarshad)
    When the question asked to draw the cobalt thing with these ligands substituted in?

    Is the cordination number with 1,2 ethandiamine ligands 3??
    Nah it is still 6 as there are 6 dative covalent bonds
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    what was the answer to why the current flowed from right to left, i put something like there were less electrons in the 1.00 cuso4 than the 0.2 cuso4 or something like that, is that right??? also the answer for why co2 is released is that it requires electricity for the backwards reaction and electricity can be made by burning fossil fuels, completely ****ed up the cobalt catalyst question also what was the answer for the final temperature change i added 9 kelvin to 298 which is wrong so was it 298-9 or is that also wrong
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    (Original post by marleyxd)
    I wrote both for each reaction.. will i still get the marks?
    no you have to write no equations
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    (Original post by MHay)
    If loads of people have written ionic equations they will probably accept it. The mark schemes are altered as they see what people write, so I presume that would be one that they would change into the mark scheme...
    If they wanted the spectator ions in the equations (ie: Na+, H+ etc.), they would have made it very clear in the question, because no question in any AQA exam has asked for those before.
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    (Original post by yarshad)
    will you do the paper another time? or?
    I'm not sure.
    Probably looks like a gap year for me. :/
    Oh well. At least I'm going to get better.

    How was the paper?
    Easy or hard?
    I'd hope for hard because then it separates the good students from the great students..
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    (Original post by SuziieB)
    Guys I just calculated that I need 75 ums to get an A. What mark could that be??

    (Please, be a C, please be a C...)

    Posted from TSR Mobile
    72ums to get a c. 55 marks
    84ums gets a b. 63 marks

    Based on last years exam boundaries! Will be similar
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    (Original post by marleyxd)
    I wrote both for each reaction.. will i still get the marks?
    Wow surprised you had enough space! I suppose you will, because in past mark schemes they haven't penalised people putting H with the Cl-s as HCl. As long as its appropriately balanced I'm sure you'd get all the marks!
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    (Original post by Divergent)
    I'm not sure.
    Probably looks like a gap year for me. :/
    Oh well. At least I'm going to get better.

    How was the paper?
    Easy or hard?
    I'd hope for hard because then it separates the good students from the great students..
    Aw, get well soon :/

    I found it quite difficult to be quite honest
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    (Original post by erniiee)
    Dunknoeee



    77 - A*
    70 - A
    62 - B
    54 - C
    46 - D
    39 - E
    As much as I would love these to be the grade boundaries, I wouldn't say the paper was more difficult than June 2012.

    My guess for grade boundaries (also based on how other people I spoke to found the paper):

    79 - A*
    72 - A
    65 - B
    57 - C
    48 - D
    41 - E
 
 
 
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