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AQA GCSE Chemistry Unit 2 24 May 2012

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    Can we try get a unnoffical mark scheme? Like put together all the questions we can remember
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    I think I put hydrogen oxide instead of hydroxide. Would that still count?
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    hey the x ion i swear was sodium hydroxide. not just hydroxide.
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    (Original post by osama2)
    hey the x ion i swear was sodium hydroxide. not just hydroxide.
    no it was hydroxide, as alkali's release hydroxide ions no sodium hydroxide . Sodium hydroxide was simply the solution left over
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    what acid did u get?
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    I can't remember the questions exactly, but what did everyone write for the stuff on ammonia?

    There was one about the yield and pressure.. i can't really remember haha
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    Yes i'm so happy i wrote 2.43 for the ammonia!!!!!!!!!!11
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    I found that paper quite hard tbh! Am i the only one. :/


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    [QUOTE=Zahirajavaid;37732085]How can u make that solution to a solid?

    you would evaporate it, to rid the water
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    Omg I thought it would be something hard and had no idea what to write


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    (Original post by kkkkkatie)
    Yes i'm so happy i wrote 2.43 for the ammonia!!!!!!!!!!11
    How did u work it out?


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    (Original post by Hajrah94)
    I found that paper quite hard tbh! Am i the only one. :/


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    So did i :L And i got an A in the jan mock. So im wishing the grade boundries are low!
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    what acid did everyone put?
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    (Original post by Zahirajavaid)
    How can u make that solution to a solid?



    This was posted from The Student Room's iPhone/iPad App
    you would evaporate the soultion, to rid the water
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    (Original post by osama2)
    what acid did everyone put?
    it was hydrochloric acid
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    (Original post by Zahirajavaid)
    How did u work it out?


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    um it took quite a long time because i did it wrong at first but i did 2/28 = 0.07142851 then 0.07142851 x 34 = 2.43 :-)
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    (Original post by tssf_skye)
    I can't remember the questions exactly, but what did everyone write for the stuff on ammonia?

    There was one about the yield and pressure.. i can't really remember haha
    the question asked why yield would increase if pressure increased:
    the answer: because there ar eless particles from the forward reaction.

    its a classic question and comes up on every past paper, this is exactly what the mark schemes say
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    what about the last question about oxygen?
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    (Original post by kkkkkatie)
    um it took quite a long time because i did it wrong at first but i did 2/28 = 0.07142851 then 0.07142851 x 34 = 2.43 :-)
    How comes u multiplied it by 34
    Sorry it's just I can't remember what answer I got I only remember how I worked it out


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    (Original post by Princess008)
    what about the ion question . what x is ion alkaline something like that?
    Alkaline was OH- ions,
    and the other one about the Ph being 1, was H+ ions.

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Updated: March 23, 2013
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