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OCR Chemistry A Exam Thread (Breadth - May 27 2016 and Depth - June 10 2016) watch

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    What did people get for (delta)H of reaction? I think I got 58.5 or something like that. Worked out q=4000(odd)J and divided by the mol of the substance you were provided with.
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    (Original post by KevinClyde)
    What did people get for (delta)H of reaction? I think I got 58.5 or something like that. Worked out q=4000(odd)J and divided by the mol of the substance you were provided with.
    Minus 58.5 as delta H is negative
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    (Original post by harryleavey)
    Was this the empirical formula question?
    LOOOL he messed it up so bad you cant even recognise the answer. Thats the crystalisation question.
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    (Original post by Nikosunway)
    Minus 58.8 as delta H is negative
    Why? The mixture increased in temperature meaning it was an endothermic reaction?
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    (Original post by mydearestpotato)
    It might come up again as in the more complicated/unfamiliar onesAttachment 539435
    What unfamiliar Hess Cycles do oyu think? Like Born-Haber cycle?
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    (Original post by KevinClyde;652342u41)
    Why? The mixture increased in temperature meaning it was an endothermic reaction?
    No mixture increased in temp suggesting heat was released, therefore exothermic
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    (Original post by KevinClyde)
    Why? The mixture increased in temperature meaning it was an endothermic reaction?
    Increase in temp means heats being given out. So its exothermic
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    (Original post by roastedcrumbs)
    No mixture increased in temp suggesting heat was released, therefore exothermic
    Oh crap yeah, that's what I put initially actually, completely blew that question then, nevermind
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    (Original post by KevinClyde)
    Oh crap yeah, that's what I put initially actually, completely blew that question then, nevermind
    That's just one mark off, I'd say...
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    As for the grade boundaries, I do think that they will remain on the same level , so >56 will get you an A.
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    (Original post by Nikosunway)
    As for the grade boundaries, I do think that they will remain on the same level , so >56 will get you an A.
    Agreed, it was probably in between the difficulty of a F321 and F322 paper (as expected with it covering everything)
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    What would 45 be?
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    (Original post by A Sajid)
    Ive had enough of this sh. Im just gonna trap. Allow A levels. I aint made for this.
    Hopefully you know enough about chemistry to make meth or something
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    did anyone get 24.8 for the volume of sulfuric acid
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    (Original post by Rabbitlover99)
    Can anyone make/link to an unofficial mark scheme? Thank you!
    did you find one?
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    I'm so dumbbbb
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    (Original post by Nikosunway)
    As for the grade boundaries, I do think that they will remain on the same level , so >56 will get you an A.
    Grade Boundary 56 for an A, What do you base that on.
    When it is normally between 46-50 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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    (Original post by sum123456)
    did you find one?
    no
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    (Original post by Mancdude)
    Grade Boundary 56 for an A, What do you base that on.
    When it is normally between 46-50 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    Based on the fact that usually you get an A from 80%+
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    (Original post by Nikosunway)
    Based on the fact that usually you get an A from 80%+
    I guess you did not do Maths then if you think 56 is 80+
 
 
 
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