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    (Original post by emah123)
    i got 0.039 as the rate? is that wrong? and what was the units?
    That's about right, the answer is a range. The units are of course mol dm^-3 s^-1 as ever.
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    (Original post by DudeBoy)
    No it asked for the hydrated salt
    Ahhh absolute killer! Still, I'm sure NiSO4 would have earned 5 or 6 marks, if I calculated some of the water stuff, but didn't use it.
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    (Original post by MathsNerd1)
    This is what I got actually, I remember the two half equations I made for it
    out of the few question I can remember I'm pretty sure that's what I put
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    (Original post by PythianLegume)
    We can't tell yet, sorry.
    what did the majority write? what about you how did you find it?
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    for the acids one, what did people say for why they had different ph's?
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    For the isomers of F and G did the isomers have 3 of the bidentate ligands and they were optical isomers?

    Thought the paper was tough in general. Grade boundaries should be lowish but doubt they'll be as low as Jan 13 (70 for an A)

    I actually got the last question although I basically guessed parts of it!

    Messed up the photosynthesis question, the rates question, the changes of concentration (tick box) question, the ferrous ion question. Hoping I've done enough for the A* however.
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    (Original post by kuku2013)
    what did the majority write? what about you how did you find it?
    I didn't have trouble with the paper, but I do think it was harder than usual.

    I wrote the element in.
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    (Original post by PythianLegume)
    That's about right, the answer is a range. The units are of course mol dm^-3 s^-1 as ever.
    I got 0.00414 recon thats correct?
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    (Original post by PythianLegume)
    I didn't have trouble with the paper, but I do think it was harder than usual.

    I wrote the element in.
    do you think it was harder than jan 2013?
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    (Original post by needtosucceed=))
    for the acids one, what did people say for why they had different ph's?
    One was a strong acid, one was weak.


    (Original post by awilson008)
    For the isomers of F and G did the isomers have 3 of the bidentate ligands and they were optical isomers?

    Thought the paper was tough in general. Grade boundaries should be lowish but doubt they'll be as low as Jan 13 (70 for an A)

    I actually got the last question although I basically guessed parts of it!

    Messed up the photosynthesis question, the rates question, the changes of concentration (tick box) question, the ferrous ion question. Hoping I've done enough for the A* however.
    Yes, 3 bidentate ligands, forming mirror images.
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    (Original post by Benjy100)
    I said it would stay the same. The whole point of the half life of a first order reactant is that it is constant regardless of concentration.
    ugh I actually thought that but no.. I listen to my idiotic exam head voice and put that it increases :mad:
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    (Original post by needtosucceed=))
    nope it was oxygen I think
    I said oxygen...
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    (Original post by PythianLegume)
    No, delta H is the energy required for the reaction, not G.
    But delta H is just the heat energy.. not taking into account disorder.

    https://wikispaces.psu.edu/display/1...Thermodynamics

    Scroll down to 'Free energy and metabolic reactions'
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    (Original post by Sinkim)
    I got 0.00414 recon thats correct?
    That's about what I got - I think it's right


    (Original post by needtosucceed=))
    do you think it was harder than jan 2013?
    Personally, yes, I didn't find jan 2013 that hard :dontknow:
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    (Original post by PythianLegume)
    About 90




    Why did your quote say that was me? I'm confused.
    Not sure I just clicked the quote button, I shall try and change it.
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    (Original post by PythianLegume)
    One was a strong acid, one was weak.




    Yes, 3 bidentate ligands, forming mirror images.
    thats all you had to put? it was 5 marks so I thought 3 for the calculation and 2 for explaining or something
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    (Original post by PythianLegume)

    Yes, 3 bidentate ligands, forming mirror images.
    Thank goodness for that!
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    (Original post by PythianLegume)
    That's about what I got - I think it's right




    Personally, yes, I didn't find jan 2013 that hard :dontknow:
    yea jan 2013 didn't have loads of little dodgy questions, only the last one and the odd couple inbetween. hoping grade boundaries arent higher than januarys!
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    (Original post by needtosucceed=))
    for the acids one, what did people say for why they had different ph's?
    I said HCl is a strong acid and dissociates fully, whereas HCOOH is a weak acid and only partially dissociates, so HCl has a higher [H3O+] and therefore a lower pH
    Then I worked out the pH values. Something like that, anyway
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    (Original post by PythianLegume)
    No, delta H is the energy required for the reaction, not G.
    But that only takes into account heat energy..
    tried to attach a web page but it didn't like it - maybe it'll come up later once moderators have finished with it but google free energy and metabolic reactions
 
 
 
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