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2016 IGCSE Chemistry Paper 2 Unofficial Mark Scheme 2016 watch

  • View Poll Results: How did Paper 2 IGCSE Chemistry go?
    95-100%
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    19.66%
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    80-89%
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    70-79%
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    30-39%
    0
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    20-29%
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    (Original post by Alomak)
    I think cracking alkanes always gives at least one alkene, not necessarily always ethene.
    maybe? im not sure
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    (Original post by Abodee1)
    2 marks* one for the right reactants and products , and one for the correct balancing.
    Which paper was it?
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    For the Iron (2) and iron (3) question I put the colour of the precipitate bt not the word precipitate. Will I still get the mark?
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    For the Iron questions? I put just the colours and didn't write the word precipitate.. Will i still get the mark?
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    If i dont balance the equation do i loose all of the 1 mark?
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    (Original post by Canwave28)
    If i dont balance the equation do i loose all of the 1 mark?
    I think so seeing as it is only 1 mark

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    (Original post by Emma654321)
    For the Iron questions? I put just the colours and didn't write the word precipitate.. Will i still get the mark?
    I'm not 100% sure but in the question they did not mention precipitate, so you had to mention it yourself.

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    Shouldn't the question about the octadecane give c10h20 and c8h18
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    so you think I will lose both marks?
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    (Original post by Hsevras)
    I'm not 100% sure but in the question they did not mention precipitate, so you had to mention it yourself.

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    So you think I will lose both marks?
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    (Original post by Emma654321)
    So you think I will lose both marks?
    it asked for the observation, so you might, but they could still give you 1 or 2 marks if they know thats what you mean
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    For the iron question: i put the colours correctly bt didnt put word precipitate. Will i get mark with like benefit of the doubt or something?
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    (Original post by metellaest)
    Will I lose the marks for the colours of the Fe2+/3+ ions if I just said the colours, without saying precipitate? Gah what a silly thing to do. Oh well - only two marks.
    I did the same thing!! I hope we get the marks. Benefit of the doubt?
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    (Original post by rcmack)
    it asked for the observation, so you might, but they could still give you 1 or 2 marks if they know thats what you mean
    Do yoI think its more likely that i will lose the marks??
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    (Original post by Emma654321)
    For the iron question: i put the colours correctly bt didnt put word precipitate. Will i get mark with like benefit of the doubt or something?
    If you'd suggested that the entire solution goes green then you'd get no marks but I think the key word here is the colour so its anyones call.
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    (Original post by Emma654321)
    Do yoI think its more likely that i will lose the marks??
    since 'brown/orange' could refer to a flame test, i think you could loose 1 mark, but you shouldnt penalise you for the same mistake twice
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    (Original post by rcmack)
    since 'brown/orange' could refer to a flame test, i think you could loose 1 mark, but you shouldnt penalise you for the same mistake twice
    i said redish-brownish precipitate instead of brown-orange, do you think i would get a mark?
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    (Original post by drogon)
    If you'd suggested that the entire solution goes green then you'd get no marks but I think the key word here is the colour so its anyones call.
    I didn't mention solution atall just put colour, and like you said colour is key word. So maybe lose one mark?
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    (Original post by melisss22)
    i said redish-brownish precipitate instead of brown-orange, do you think i would get a mark?
    theyll give you the mark for brown precipitate, but ignore the red, so you should get the mark!
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    What mark do you think is good to get in this paper?
 
 
 
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