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

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    (Original post by Mancdude)
    I guess you did not do Maths then if you think 56 is 80+
    Total marks : 70.

    80% out of total : 70* 0.8=56. Any questions?
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    Has anybody got an official mark scheme?


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    (Original post by Rabbitlover99)
    no
    http://www.thestudentroom.co.uk/show....php?t=4123873
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    For the last question going from a haloalkane to alcohol, they asked for the reagent, but I put OH-. Do you think I will still get the mark?
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    (Original post by sum123456)
    did you find one?
    http://www.thestudentroom.co.uk/show....php?t=4123873
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    anyone ? 24.8 for the volume of h2s04
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    thanks
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    Was the (delta)H of reaction not -29?
    I thought you put the (aq) 50cm3 as the mass in the equation, not the sum of the 2 (100) which would give you -58
    What do you guys think?
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    (Original post by 456CJ)
    did anyone get 24.8 for the volume of sulfuric acid
    yup
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    (Original post by Nikosunway)
    Total marks : 70.

    80% out of total : 70* 0.8=56. Any questions?
    yes question is are we talking about the same exam because it is marked out of 60.
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    (Original post by CheeseIsVeg)
    Was the (delta)H of reaction not -29?
    I thought you put the (aq) 50cm3 as the mass in the equation, not the sum of the 2 (100) which would give you -58
    What do you guys think?
    no
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    (Original post by 456CJ)
    no
    Mass of water? (aq)?
    Still nah
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    (Original post by CheeseIsVeg)
    Mass of water? (aq)?
    Still nah
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    total mass was 50+50
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    (Original post by 456CJ)
    total mass was 50+50
    But that's not the mass of water.......
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    (Original post by Fish40)
    Anyone get 29. Something for the enthalpy change of reaction? I think it might be 58 ,


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    yeah i got 29 too not exactly 29 but like 29. something
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    (Original post by CheeseIsVeg)
    But that's not the mass of water.......
    it said in the question that the density of the liquids are the same as for water.
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    (Original post by 456CJ)
    it said in the question that the density of the liquids are the same as for water.
    Damn
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    Did not see that fml
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    (Original post by Jitesh)
    What unfamiliar Hess Cycles do oyu think? Like Born-Haber cycle?
    Like this, idk if that's Born-Haber


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    (Original post by hashman)
    yeah i got 29 too not exactly 29 but like 29. something
    29.3?
    (Original post by Mancdude)
    yes question is are we talking about the same exam because it is marked out of 60.
    it said 70 on the exam paper

    (Original post by hashman)
    yeah but apparently its wrong it was something like -58.5 D:
    at least we get method marks right?
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    (Original post by alkaline.)
    29.3?
    yeah but apparently its wrong it was something like -58.5 D:
 
 
 
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