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

OCR A2 CHEMISTRY F324 and F325- 14th and 22nd June 2016- OFFICIAL THREAD watch

    Offline

    5
    ReputationRep:
    (Original post by luckycactus1337)
    advantage of hydrogen fuel cell
    - more efficient
    -only produces water and CO2

    advantages of methanol in fuel cell?
    - made from biomas
    -renewable
    -source of hydrogen in liquid form hence easier to store
    hydrogen fuel cells don't produce CO2 do they?
    Offline

    7
    ReputationRep:
    Guys!

    pH of strong acids, when do you k ow you are supposed to take square root of Ka and minus log it?

    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by a209150)
    Guys!

    pH of strong acids, when do you k ow you are supposed to take square root of Ka and minus log it?

    Posted from TSR Mobile
    Yup
    Offline

    7
    ReputationRep:
    I mean when do we do this? Because normally we just minus log the concentration.

    Posted from TSR Mobile
    Offline

    1
    ReputationRep:
    Morning guys, you excited yet? I was just wandering if we need to know how to calculate the entropy change of the surrounding in this exam. Its not in the official textbook but it is in the revision guides ? thanks
    Offline

    2
    ReputationRep:
    (Original post by a209150)
    Guys!

    pH of strong acids, when do you k ow you are supposed to take square root of Ka and minus log it?

    Posted from TSR Mobile
    For strong acids isn't the [H+] = to the [Acid]??? Then just -log it
    Offline

    1
    ReputationRep:
    For energy calculations do yu use temperature in kelvin or celcius
    Offline

    1
    ReputationRep:
    (Original post by cicilyvontes)
    For energy calculations do yu use temperature in kelvin or celcius
    Gibbs Free Energy? Kelvin
    Offline

    3
    ReputationRep:
    Good luck everyone
    Offline

    2
    ReputationRep:
    I got X as 4 not really sure tho, overall it was alright
    Offline

    1
    ReputationRep:
    Had no clue for half of q7, apart from that it was okay. Was this an easy or a hard paper?
    Offline

    1
    ReputationRep:
    (Original post by Vannzzoo)
    I got X as 4 not really sure tho, overall it was alright
    Me too but my friend is adamant it was 6
    Offline

    2
    ReputationRep:
    (Original post by Matteus3)
    Me too but my friend is adamant it was 6
    Tbh I'm not really sure, I'm just happy that I got a reasonable number 😂
    Offline

    11
    ReputationRep:
    What was the balanced equation for the redox reaction of iodine in alkaline?
    Offline

    1
    ReputationRep:
    (Original post by Vannzzoo)
    I got X as 4 not re1ally sure tho, overall it was alright
    Yes I got 4 as well. Hope that's right as the majority in my college are saying it is.
    Offline

    0
    ReputationRep:
    (Original post by Vannzzoo)
    I got X as 4 not really sure tho, overall it was alright
    I got X as 4 as well!
    Offline

    1
    ReputationRep:
    (Original post by Vannzzoo)
    Tbh I'm not really sure, I'm just happy that I got a reasonable number 😂
    Same, even if it's wrong you only lose like 1 mark though, so glad Chem is over😃
    Offline

    1
    ReputationRep:
    That paper seemed like it wanted a lot of knowledge of facts and less mathematical stuff, definitely harder than last years but about par for difficulty imo. Maybe 75 for an A based on my personal experience.
    Offline

    2
    ReputationRep:
    X=4 anyone?


    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    What numbers did people get for the maths based questions?
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.