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    (Original post by perpetua)
    If there is a lot of crossing out but the answer was correct.... Is it ok
    If you look at previous mark schemes they want full working out for the marks, as long as you showed them how you got your answer you will be fine, but you will always get a mark for a correct final answer
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    (Original post by Sufyxyz)
    It was 2238
    wasnt it 2328?
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    (Original post by cowie)
    Very easy paper! Definitely a bit harder than last years though so I would guess grade boundaries will be similar or perhaps 1/2 marks lower


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    I think they'll be higher than last year to be honest, I'm expecting 95/100 for 120 UMS, 87/100 for A*, etc.
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    (Original post by zombaldia)
    If you look at the equation it's just le chatelliers so inc pressure means more h2o produces which means more redox and less oxidation and so emf inc.

    Sa has no effect

    conditions are 298k, 100kpa(although not sure if relevant there) and then 1m solution
    I thought hydrogen oxygen cell was my reversible and hence lie chateliers principle wouldn't have any effect?


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    (Original post by chloeabeki)
    wasnt it 2328?
    It was something like that, but I remember all those numbers appearing!!
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    Anyone remember for lattice dissociation. Did we get given atomisation of oxygen or bond enthalpy of oxygen?
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    (Original post by cowie)
    Very easy paper! Definitely a bit harder than last years though so I would guess grade boundaries will be similar or perhaps 1/2 marks loweRe
    Agree 100%
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    what were the reagents used to change Cr3+ to Cr2+?
    i wrote Zn with H+?
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    I didn't multiply my moles of c2042- by 3 as I didn't see they was 3 of them in the formula, will I get about 5/6 marks for the question??
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    I completely blanked on the purity question. How many marks would I get if I get the 2 half equations right, but the overall equation is wrong? And I did all the method right but got the wrong answer? Overall I feel like this paper was good, but made a lot of stupid mistakes.
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    (Original post by Johnny98)
    Anyone remember for lattice dissociation. Did we get given atomisation of oxygen or bond enthalpy of oxygen?
    We were given atomisation
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    (Original post by 12284)
    what were the reagents used to change Cr3+ to Cr2+?
    i wrote Zn with H+?
    Yup.

    I also put a hydrogen atmosphere but I don't think that's necessary.
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    I got around 35% for purity
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    (Original post by emma_1111)
    I got around 35% for purity
    Got that too, sadly its wrong but probs still get a good 4/5 marks so
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    Liked most the exam besides purity question, my end mass was larger than the initial mass so something went wrong there 😂
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    (Original post by emma_1111)
    I got around 35% for purity
    Same but I didn't divide the moles of C2O4 by 3 unfortunately
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    (Original post by emma_1111)
    I got around 35% for purity
    I got the same, but we had to times by 3 because of one of the ratios in the equation, giving around 90 something.
    Hopefully we only lose 1 or 2 marks
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    (Original post by ssamarai)
    Got that too, sadly its wrong but probs still get a good 4/5 marks so
    Me too! Oh well at least we tried
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    Was h2so4 the box we had to tick and what was the colour of cr(h20)6 2+
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    Purity 50.7 anyone?
 
 
 
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