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2016 IGCSE Chemistry Paper 2 Unofficial Mark Scheme 2016 Watch

  • View Poll Results: How did Paper 2 IGCSE Chemistry go?
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    (Original post by aaljhfgahsj)
    Do you think they'll accept orange in place of red, the question wasn't that clear
    May 2014 1C had a similar question, and it says orange/pink as the correct answers and accepts red. (Although I thought red was the correct answer rather than an accepted but not technically correct answer because that's what was in my revision guide :/)
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    When crystals form at the bottom of a glass rod it is at the point of crystallisation. When you put the glass rod in.


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    wow i think i put rred
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    nope u see the edexcel igcse june 2014 1C paper.. question 15.. the same question is there... they accept red also.. huh!!!!!!
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    Guys i used 3 volumes for the average, who else did that?
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    i remember a couple of answers apart from given above.. i ll share them later
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    MgCl has high melting point
    It is a giant ionic structure
    So it has a lot of strong ionic bonds caused by electrostatic attraction between oppositely charged ions
    So it requires a high energy to break these bonds
    Meaning that a high temperature (high thermal energy) is needed to break these bonds and cause the compound to melt.


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    (Original post by Abodee1)
    Guys i used 3 volumes for the average, who else did that?
    yea, had to double check because i was expecting 2!
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    (Original post by Abodee1)
    Guys i used 3 volumes for the average, who else did that?
    Yep same
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    3 volumes for average answer is 22.53


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    (Original post by rcmack)
    yea, had to double check because i was expecting 2!
    it was 22.5333333
    which can be rounded to 22.53 i believe?
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    (Original post by Nurne)
    3 volumes for average answer is 22.53


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    was that part of the Magnesium chloride one?
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    (Original post by Abodee1)
    Red is totally wrong,It is orange.Red is for acid.
    (Original post by Nurne)
    Orange at neutralisation not red. Red is acid.


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    (Original post by aaljhfgahsj)
    Do you think they'll accept orange in place of red, the question wasn't that clear
    Just read these (after posting the post I just posted), I didn't realise there was a colour for neutral (it would be nice if the CGP revision guides could mention it ???) but hopefully my answer will be accepted like the summer 2014 1c paper.
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    For the organic product I just added H to every bond as H can only make one bond there was no room for OH so I assumed another non-organic product would be made as it only asked for the organic product
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    Nothing incorrect so far, seems like a full mark? wow never thought thats possible.
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    Fe3+ Orange/Brown precipitate
    Fe2+ Dark green precipitate


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    (Original post by Lelanor)
    Just read these (after posting the post I just posted), I didn't realise there was a colour for neutral (it would be nice if the CGP revision guides could mention it ???) but hopefully my answer will be accepted like the summer 2014 1c paper.
    i would literally be dead if it werent for tthe CGP books
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    (Original post by rcmack)
    was that part of the Magnesium chloride one?
    Part of the KOH titration one it was the last part.


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    C8H18 +8 1/2O2 -> 8CO + 9H20


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    For the first question it asked where did the stduent obtain the sand and it was stage 2, filtration and then in which stage he obtained the salt and i believe it was stage 3 (crystallisation) .
 
 
 
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