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    (Original post by 97Y)
    Agh, everyone found it easy and now the grade boundaries will be high -_-
    Ikr Everyone doing the exam came out and thought it was so easy... I hope the grade boundaries aren't too unfair
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    Honestly the pissest paper I've done. Anyone who's done all the past papers should have found that easy. Only one question was slightly different to previous years and that was the first one which was 7 marks and that was still fairly easy.
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    Anyone else get 351 kjmol-1 for the bond enthalpy question?
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    (Original post by Adilkhanio)
    It asked for he pros and cons of hydration not fermentation?
    (Original post by Seclusion)
    Pretty sure it was Fermentation, but someone else can confirm.
    (Original post by lahigueraxxx)
    It was definitely fermentation
    (Original post by Adilkhanio)
    Was it pros and cons of fermentation or hydration im sure it was hyrdration as it asked for the conditions for hudration in the qeustion
    "On an industrial scale ethanol can be produced from ethene by direct hydration or from glucose by fermentation.

    State the conditions for the direct hydration reaction.

    State two advantages and two disadvantages of the fermentation method compared with the direct hydration method"
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    (Original post by Bigboss27)
    For the method question i said add dilute nh3 and time how long it takes to completely dissolve is this right
    No. You're measuring how quickly the precipitate forms not how quickly it dissolves.
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    (Original post by Seclusion)
    Ba2+ so42- goes to Ba2SO4
    Fe + Cu2+ goes to Fe2+ + Cu

    Some answers I remember. It was a pretty good paper.
    Ba 2+ and SO4 2- go to BaSO4 not Ba2
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    (Original post by Adilkhanio)
    Was it pros and cons of fermentation or hydration im sure it was hyrdration as it asked for the conditions for hudration in the qeustion
    deffo fermentation

    I wrote

    - depletes land for food crops
    - product must be purified

    Advantages

    - renewable
    - C neutral (kinda)
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    I just put the pros amd cons of hydration do you think id still get some of the marks as i did imply how fermentation may be a better or worse process?
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    (Original post by serayph)
    Ba 2+ and SO4 2- go to BaSO4 not Ba2
    Sorry, yea that's what i put. lol
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    (Original post by lahigueraxxx)
    Ikr Everyone doing the exam came out and thought it was so easy... I hope the grade boundaries aren't too unfair
    Tbh I think that I really know my stuff and I didn't find it -that- easy..
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    (Original post by isobel.j.l)
    I agree, it wasnt like the past papers at all
    No, they seemed to have changed the style of all the questions, and mixed in ISA-style questions like the new spec.
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    (Original post by Jamio)
    I just put the pros amd cons of hydration do you think id still get some of the marks as i did imply how fermentation may be a better or worse process?

    No marks awarded, except for the conditions part.
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    What did everyone put for the observations for Mg with steam (I got the white solid formed but wasn't sure for the second one so put squeaky pop for the Hydrogen gas
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    Anyone else feeling quite confident with how that exam went? I don't think they asked that many demanding questions tbh
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    (Original post by Hopefulmedic15)
    What did everyone put for the observations for Mg with steam (I got the white solid formed but wasn't sure for the second one so put squeaky pop for the Hydrogen gas
    I put effervescence of H2 and bright white flame
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    (Original post by Hopefulmedic15)
    What did everyone put for the observations for Mg with steam (I got the white solid formed but wasn't sure for the second one so put squeaky pop for the Hydrogen gas
    i put white ppt and bright white flame??
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    (Original post by maestrocam)
    No, they seemed to have changed the style of all the questions, and mixed in ISA-style questions like the new spec.
    Wayheyyyy just when i thought id survived the isas
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    (Original post by Hopefulmedic15)
    What did everyone put for the observations for Mg with steam (I got the white solid formed but wasn't sure for the second one so put squeaky pop for the Hydrogen gas
    White ppt for the MgO and a bright white flame due to the Mg burning
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    (Original post by isobel.j.l)
    i put white ppt and bright white flame??
    Magnesium produces the Bright white flame, not sure if they would credit white ppt, the second reason has to be about hydrogen, which is the pop.
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    You wouldn't see the H2 being produced, only a pop when you put a lit splint into the test tube.
 
 
 
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