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OCR Chemistry A F325 Equilibria, Energetics and Elements Wed 13 June 2012

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    (Original post by clownfish)
    7dii) and the methanol fuel cell:
    CH3OH + H2O --> CO2 + 6e- + 6H+
    3/2 O2 + 6H+ + 6e- --> 3H2O

    Hope that helps.
    about this one, could you just let me know which one happens at the positive electrode and which at the negative please. cheers
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    (Original post by Klaw)
    Is it impossible to get 140/150 UMS?
    Nope I've seen someone get 150/150 o.o They said they did a lot of past papers though
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    can someone please help me with this ques....
    How would u determine the order of a reaction experimentally?...
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    (Original post by Yonko)
    can someone please help me with this ques....
    How would u determine the order of a reaction experimentally?...


    Determining the order of reaction is very easy.
    http://www.youtube.com/watch?v=l_yY3H-hVmk
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    (Original post by Yonko)
    can someone please help me with this ques....
    How would u determine the order of a reaction experimentally?...

    You have to set a few experiments where you keep the concentration of one reactant constant and change the other then monitor the rate of reaction and do the same for Reactant B.
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    (Original post by Killjoy-)
    I usually use this site for maths past papers, but there's no reason they shouldn't have chem ones:

    http://www.xtremepapers.com/
    thank you soo much!!!!
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    thank youuu
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    Does anyone have any F325 notes they could kindly share?
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    (Original post by Cath-ay)
    Nope I've seen someone get 150/150 o.o They said they did a lot of past papers though
    Wow even with a lot of past papers I can't imagine getting that
    :nosebleed:
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    (Original post by silver0)
    Does anyone have any F325 notes they could kindly share?
    http://getrevising.co.uk/search?q=OC...+Chemistry&go=
    There are a lot of notes and stuff there, such as a power point covering transition metals
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    (Original post by Carbon12)
    Determining the order of reaction is very easy.
    http://www.youtube.com/watch?v=l_yY3H-hVmk
    thanx....
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    (Original post by LifeIsGood)
    You have to set a few experiments where you keep the concentration of one reactant constant and change the other then monitor the rate of reaction and do the same for Reactant B.
    thanx........
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    Would this be an acceptable definition for 'Enthalpy Change of Hydration':

    Enthalpy change which accompanies the formation of an infinitely dilute solution when 1 mole of gaseous ions completely dissolves in water to form 1 mole of aqueous ions
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    (Original post by --NWzD9--)
    Would this be an acceptable definition for 'Enthalpy Change of Hydration':

    Enthalpy change which accompanies the formation of an infinitely dilute solution when 1 mole of gaseous ions completely dissolves in water to form 1 mole of aqueous ions
    They're kind of the same thing, I would cut out the first one, and take the accepted definition in your textbook, can't go wrong with those.

    Mine would be something like: The enthalpy change that occurs when one mole of isolated gaseous ions completely dissolves in water to form one mole of aqueous ions, under standard conditions.
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    Has anyone got the Jan 2012 paper and mark scheme for this?
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    (Original post by Raj K)
    Has anyone got the Jan 2012 paper and mark scheme for this?
    Paper was in this thread: http://www.thestudentroom.co.uk/show...2#post37542315

    Link doesn't include the MS though.
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    (Original post by Killjoy-)
    Paper was in this thread: http://www.thestudentroom.co.uk/show...2#post37542315

    Link doesn't include the MS though.

    (Original post by Raj K)
    Has anyone got the Jan 2012 paper and mark scheme for this?
    MS is further down the page that killjoy link you to - posted by me
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    (Original post by Cath-ay)
    MS is further down the page that killjoy link you to - posted by me
    I stand corrected
  19. Offline

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    (Original post by Killjoy-)
    Paper was in this thread: http://www.thestudentroom.co.uk/show...2#post37542315

    Link doesn't include the MS though.
    thankyou !!!!!
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    (Original post by Cath-ay)
    MS is further down the page that killjoy link you to - posted by me
    thank you!!! (:

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