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IAL Chemistry Unit 1 edexcel 2017 October Mark Scheme Watch

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    ls if the paper is dry crystals are dry
    (Original post by hami_2000)
    What did you guys write for how do you know when enough water has been evaporated for the crystallization thing

    I wrote that pure dry crystals appear or maybe i think the answer should have been to press filter paper on crysta
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    i mean visibly dry crystals were to be seen. but idk if that is right..what did you write
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    (Original post by fafa90)
    i mean visibly dry crystals were to be seen. but idk if that is right..what did you write
    I wrote when crystal appears. The paper stuff was for the next question which on how to prepare pure dry crystals
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    for that part i wrote you filter the solution and heat it so that excess water evaporates and you get pure dry crystals
    (Original post by hami_2000)
    I wrote when crystal appears. The paper stuff was for the next question which on how to prepare pure dry crystals
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    someone tell me the threshold for this paper...anyoneeeeeee?
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    its 55 for A
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    (Original post by jazlilong)
    its 55 for A
    How do you know
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    how did you show the volume was12cm3??? anyone for the section B q1
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    dont know how to prep for unit 3 please helppp....I'm studying on my own for this one...Also someone has Activebook?? please email me ..I
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    okay for everyone who will read this thread let us answer every question and discuss m posting questions that i remember ..

    There was mcq q about some
    Refrigirant …another one was delta T question…ugh so annoying tht was…another was carbon was 80% H as 20% find the molecular formula…
    I guess the answer was D c4H10.?? Is that what you guys got

    For section B q part iii how to show volume was 12cm3 and molarity was 2.00. That crazy salt question. I didn't finish it Couldn't do the yield as time was over.

    2nd question all about organic chem..didin;t get the dimer right and the octane part ..other was comparatively easy substitution and addition parts. 3rd question about potassium and argon were easy. %abndance I got wrong how did you guys calculate. How to get pure crystals part was easy. Atom economy was easy. What else was in the paper?
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    it was c2h6 for molecular formula
    abundance u use this x35 x 37(x-1)= 35.58 let x be the abudance of 35
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    anyone know whats the answer for the most abundant?? is it 1bromo propan2ol or2 bromo propran 1-ol.. even my teacher dont know
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    this question was repeated from previous years and the answer was c4h10 because this question..

    It was 2 bromopropan 1 ol ..this was in the book aswell
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    (Original post by jazlilong)
    its 55 for A
    how was unit 2 and what was the metal
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    it was comparatively easier than Unit 1, and i got the metal as Lithium. what about you?
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    ya it was really easy.. it was definitely lithium
 
 
 
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