Hey there Sign in to join this conversationNew here? Join for free

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

Announcements Posted on
    • 2 followers
    Offline

    ReputationRep:
    (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
    • 10 followers
    Offline

    ReputationRep:
    (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
    • 0 followers
    Offline

    ReputationRep:
    can someone please help me with this ques....
    How would u determine the order of a reaction experimentally?...
    • 0 followers
    Offline

    ReputationRep:
    (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
    • 27 followers
    Offline

    ReputationRep:
    (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.
    • 0 followers
    Offline

    ReputationRep:
    (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!!!!
    • 0 followers
    Offline

    ReputationRep:
    thank youuu
    • 0 followers
    Offline

    ReputationRep:
    Does anyone have any F325 notes they could kindly share?
    • 0 followers
    Offline

    ReputationRep:
    (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:
    • 0 followers
    Offline

    ReputationRep:
    (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
    • 0 followers
    Offline

    ReputationRep:
    (Original post by Carbon12)
    Determining the order of reaction is very easy.
    http://www.youtube.com/watch?v=l_yY3H-hVmk
    thanx....
    • 0 followers
    Offline

    ReputationRep:
    (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........
    • 0 followers
    Offline

    ReputationRep:
    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
    • 6 followers
    Offline

    ReputationRep:
    (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.
    • 7 followers
    Offline

    ReputationRep:
    Has anyone got the Jan 2012 paper and mark scheme for this?
    • 4 followers
    Offline

    ReputationRep:
    (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.
    • 10 followers
    Offline

    ReputationRep:
    (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
    • 4 followers
    Offline

    ReputationRep:
    (Original post by Cath-ay)
    MS is further down the page that killjoy link you to - posted by me
    I stand corrected
    • 7 followers
    Offline

    ReputationRep:
    (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 !!!!!
    • 7 followers
    Offline

    ReputationRep:
    (Original post by Cath-ay)
    MS is further down the page that killjoy link you to - posted by me
    thank you!!! (:

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?

    this is what you'll be called on TSR

  2. this can't be left blank
    this email is already registered. Forgotten your password?

    never shared and never spammed

  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide the button to the right to create your account

    Slide to join now Processing…

Updated: May 31, 2014
New on TSR

Your favourite film of the year?

For you personally what has been the best 2014 movie

Article updates
Reputation gems:
You get these gems as you gain rep from other members for making good contributions and giving helpful advice.