Join TSR now and get all your revision questions answeredSign up now

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%

    Offline

    0
    ReputationRep:
    Please could someone help me on June 2012 4eii
    Offline

    1
    ReputationRep:
    Has anyone got the jan 13 paper? I would be very grateful, I'm sure it's on here somewhere but theres 85 pages :rolleyes:
    Offline

    2
    ReputationRep:
    Can someone please explain how fractional distillation works in easy bullet points?
    Offline

    0
    ReputationRep:
    (Original post by Ingamo)
    Has anyone got the jan 13 paper? I would be very grateful, I'm sure it's on here somewhere but theres 85 pages :rolleyes:
    Here's the examiners report too

    http://www.ocr.org.uk/Images/136530-...ts-january.pdf
    Attached Images
  1. File Type: pdf F322 - Jan13.pdf (761.3 KB, 96 views)
  2. File Type: pdf F322 - Jan13.pdf (275.1 KB, 74 views)
    Offline

    1
    ReputationRep:
    (Original post by GeneralOJB)
    Here's the examiners report too

    http://www.ocr.org.uk/Images/136530-...ts-january.pdf
    Thank you so much!
    Offline

    0
    ReputationRep:
    (Original post by NLoR)
    Please could someone help me on June 2012 4eii
    If you flip the first equation, and add it to the second, and cancel out the terms that are the same on both sides, you will notice that you will get the enthalpy change of formation of N2O. So to find the actual value, just flip -193 to get 193 and add it to -111 to get 82.
    Offline

    0
    ReputationRep:
    Anyone got a list of the reaction conditions that are required in OCR Chemistry B (Salters) for F332?

    Would be greatly appreciated!
    Offline

    0
    ReputationRep:
    Can someone tell me the definitions we need to know about isomers please, thanks


    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by GeneralOJB)
    If you flip the first equation, and add it to the second, and cancel out the terms that are the same on both sides, you will notice that you will get the enthalpy change of formation of N2O. So to find the actual value, just flip -193 to get 193 and add it to -111 to get 82.
    Oh yeah! Thank you very much! That was a sneaky question haha!
    Offline

    0
    ReputationRep:
    (Original post by Gingerstudent999)
    Can someone tell me the definitions we need to know about isomers please, thanks


    Posted from TSR Mobile
    Stereoisomerism
    Compounds with the same structural formula but the atoms have different 3-dimensional (spatial) arrangement

    Structural Isomerism
    Molecules with the same molecular formula but different structural formula
    Offline

    0
    ReputationRep:
    (Original post by Saif95)
    Can someone please explain how fractional distillation works in easy bullet points?

    Fractional distillation

    -Crude oil is vaporised
    -The vaporised oil is passed through the fractionating column
    -The different substances in it condense off at different points due to their different boiling points
    - Each fraction contains hydrocarbon molecules with a similar number of carbon atoms.
    - The different boiling points arise due to the length of the hydrocarbon and also the amount of branching (it is all to do with the different van der Waal forces and the amount of surface contact)
    - From then the hydrocarbons usually go through a process of cracking where longer chained saturated hydrocarbons are broken down into shorter chained alkanes/alkenes because they are more useful (e.g. shorter chained alkanes promote more efficient combustion and are better fuels)
    Hope this makes sense!
    Offline

    0
    ReputationRep:
    (Original post by GeneralOJB)
    Stereoisomerism
    Compounds with the same structural formula but the atoms have different 3-dimensional (spatial) arrangement

    Structural Isomerism
    Molecules with the same molecular formula but different structural formula
    Thank you


    Posted from TSR Mobile
    Offline

    3
    ReputationRep:
    What are the definitions that we need to know? As a Defo?
    Offline

    0
    ReputationRep:
    How come the majority of questions in past papers are written in the structural formula? do we need to usually give our answers like that too?
    Offline

    0
    ReputationRep:
    (Original post by flygerianmc)
    How come the majority of questions in past papers are written in the structural formula? do we need to usually give our answers like that too?
    Unless it specifically asks, you may use displayed, structural or skeletal, it doesn't matter.
    Offline

    2
    ReputationRep:
    (Original post by GeneralOJB)
    Look at the mechanism, you should be able to figure it out from there if you swap the water for methanol.
    ah that makes sense now, thanks!
    Offline

    2
    ReputationRep:
    (Original post by Freddy-Francis)
    What are the definitions that we need to know? As a Defo?
    all the ones you have to know are listen on the specification
    Offline

    0
    ReputationRep:
    Any predictions?
    Offline

    2
    ReputationRep:
    (Original post by xomaxhox)
    Anyone got a list of the reaction conditions that are required in OCR Chemistry B (Salters) for F332?

    Would be greatly appreciated!
    this is the OCR A thread, try the ocr B one
    Offline

    0
    ReputationRep:
    (Original post by Gotzz)
    Any predictions?
    To be honest nearly everything comes up due to it being a 100 mark exam.
 
 
 
Poll
If you won £30,000, which of these would you spend it on?

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

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