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OCR Chemistry F322~ 4th June 2013~ AS Chemistry Watch

  • View Poll Results: How did you find the exam
    Hard A= 72
    42
    15.22%
    It was okay A= 76
    99
    35.87%
    Easy A= 79
    75
    27.17%
    Very Easy A=82
    60
    21.74%

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    From seeing those old spec questions, had made me panic loads now


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    (Original post by Sara_A)
    Does anyone know where the specimen paper mark scheme is?
    Yup http://www.ocr.org.uk/Images/75089-u...s-specimen.pdf
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    Thanks, didnt know you had to scroll down for the mark scheme silly me
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    (Original post by tom2013)
    Hi guys, I am going to retake this paper for the 3rd time I got C first time around and then got a U in January! So any advise on how to revise for this unit??
    oh, I thought Jan 2013 was much easier that June 2012
    I got e in June 12 and c in Jan 13
    this time I'm aiming to a freaking A
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    can someone help on question 3 b) ii) the cycle

    http://www.ocr.org.uk/Images/78566-q...-resources.pdf
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    (Original post by shomshomni)
    Thank you!!!!!
    Ni for Dehydration too...
    Palladium, Rhodium and Platinum for Isomerisation...
    Inert Aluminium Oxide for Isomerisation and Reforming...



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    (Original post by MAZADO)
    can someone help on question 3 b) ii) the cycle

    http://www.ocr.org.uk/Images/78566-q...-resources.pdf
    -393-285-168--54=-792
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    (Original post by MAZADO)
    can someone help on question 3 b) ii) the cycle

    http://www.ocr.org.uk/Images/78566-q...-resources.pdf
    Hi, Sure,
    You need to cancel out the same elements in each two equations, to get the equations in the box
    for example for the first one:
    C(s) (up) cancelles with C(s) (down)
    and
    11/2 O2 (up) cancels with the 11/2 O2 (down)
    so what is left is same as 4th equation, u see?
    then put the value
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    (Original post by iamvick)
    That's not actually in the specimen. What you need to know is the rate of hydrolysis increases as you move down group 7. This is because the bond enthalpy of the C-Halogen bond weakens and so is easier to break; hence a faster reaction.
    You need to know primary secondary tertiary halogenoalkanes. It was in the past paper

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    (Original post by amin666)
    Hi, Sure,
    You need to cancel out the same elements in each two equations, to get the equations in the box
    for example for the first one:
    C(s) (up) cancelles with C(s) (down)
    and
    11/2 O2 (up) cancels with the 11/2 O2 (down)
    so what is left is same as 4th equation, u see?
    then put the value
    got it thanks very much!
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    Can someone explain greenhouse effect pleade

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    Just a warning to people who thinking to take A2 Chemistry next year ( ITS A PAIN ).
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    can someone please explain the key points from chapter 4?

    Thanks in advance
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    (Original post by amin666)
    Just a warning to people who thinking to take A2 Chemistry next year ( ITS A PAIN ).
    How is A2 if you find AS not too bad
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    For anyone who has done the January 2013 paper, the last question was worth 10 marks and gave mass of C, H & O. However I ignored them & used the m/z to find the mr and used trial and error to get the molecular formula.
    After deducing X I found Y however to achieve full 10 marks do I have to use all information in the question? I find it unfair answering the question exactly but to get all the marks I have to use information I don't need like fragment ions. :/
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    ****storm in this thread. Have some sleep and do some last minute revision tomorrow morning.
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    (Original post by Sum786)
    can someone please explain the key points from chapter 4?

    Thanks in advance
    use of catalyst in car.
    ways to store CO2 ( under sea bed, react with base to make carbonates)
    global warming, and how its produced ( by absorbing of IR radiation by CO2 and H2O, bonds vibrating and emit the energy back to earth)


    these are the most important parts that always will be questions from in exam paper.
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    GUYS IM CRAMMING NOW BECAUSE I DIDN'T GET TIME TO REVISE OVER THE PAST FEW WEEKS BECAUSE I WAS REALLY WORRIED ABOUT BIOLOGY 1 AND CHEM 1 RESITS ://///


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    predictions on what will come up?:confused:
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    (Original post by theo3335796)
    How is A2 if you find AS not too bad
    I'm doing A2 chem only because i didn't have any other choice, its a pain specially F325
    you need to know F321, F322 and F324 to answere the questions,
    and its horrible
 
 
 
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