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Edexcel A2 Chemistry Exams -6CH04 (14th June) and 6CH05 (22nd June) Discussion Thread Watch

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    (Original post by sabahshahed294)
    Anyone?
    see below
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    (Original post by samb1234)
    see below
    Ty so much!
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    (Original post by C0balt)
    Where can i get Jan 16?
    I've attached it below.

    (Original post by samb1234)
    You want the max amount of the complex, which has one metal ion and 2 two ligands. Therefore the max is going to be when the ratio of metal to ligand is 1:2, so B (as for example if I have 50/50 then I can only have 2.5cm^3 of the metal reacting with ligand)
    I get it now - that was my initial notion as well, to have 1:2 since the conc. is the same.
    Attached Images
  1. File Type: pdf WCH05_01_que_20160127.pdf (516.8 KB, 60 views)
  2. File Type: pdf WCH05_01_msc_20160302.pdf (269.6 KB, 55 views)
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    (Original post by Don Pedro K.)
    Mate 78 is like a solid score for me on the NORMAL ONES LOL YOU'RE INSANE!!!!! (In a good way)
    ikr? I would be happy with that in my U4, let alone U5 hahahah

    if Samb is this good in his 4th subject, i can't imagine what a god he'd be in others xD
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    (Original post by Ayman!)
    I've attached it below.



    I get it now - that was my initial notion as well, to have 1:2 since the conc. is the same.
    Cheers man
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    (Original post by Ayman!)
    I've attached it below.



    I get it now - that was my initial notion as well, to have 1:2 since the conc. is the same.
    were there any questions from the jan 15 one btw? I personally didn't like the whole paper seemed a lot harder than most of the ones i've done before
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    Ayman! Chemistry is his 4th subject?!?! Wat the flipping heck xD He's on a whole 'nother level hahaha
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    Um this is a slightly late question but what do ppl think will be full UMS mark for unit 4
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    (Original post by samb1234)
    were there any questions from the jan 15 one btw? I personally didn't like the whole paper seemed a lot harder than most of the ones i've done before
    Only number 2. I think I figured it out though. I think you need to consider the number of OH- as well. I'll be coming out with a whole list of problems I've run into once I'm done with the past papers. 😂

    How's your physics 4 btw? Mine is actually pretty decent atm.

    Sent from my SM-G920I using Tapatalk
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    (Original post by Ayman!)
    Only number 2. I think I figured it out though. I think you need to consider the number of OH- as well. I'll be coming out with a whole list of problems I've run into once I'm done with the past papers. 😂

    How's your physics 4 btw? Mine is actually pretty decent atm.

    Sent from my SM-G920I using Tapatalk
    OH- doesn't matter you just have to consider the oxidation states

    N goes from +5 to - 3 so 8 electrons on the LHS
    Al goes from 0 to +3 so 3 electrons on the RHS
    Common multiple is 24 so multiply first half eq by 3 and second by 8 to cancel the e- therefore D
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    (Original post by Ayman!)
    Only number 2. I think I figured it out though. I think you need to consider the number of OH- as well. I'll be coming out with a whole list of problems I've run into once I'm done with the past papers. 😂

    How's your physics 4 btw? Mine is actually pretty decent atm.

    Sent from my SM-G920I using Tapatalk
    Nah you can ignore the OH-. Looking at ox states, OH is same, Nitrogen is -8 and Al is +3. So Al loses 3 electrons, and nitrogen gains 8 so by lowest common multiple electrons transferred are 24, so 8 Al and 3 nitrogen. Physics 4 is fine atm, currently on my third paper for it
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    (Original post by Supermanxxxxxx)
    Honestly I have no clue


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    Ok, so if you add hcn in kcn, the cn- attacks the carbonyl group, eventually forming thr hydroxy-nitrile. You can then hydrolyse the cn group to the carboxylic acid group with an aqueous acid under reflux.
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    (Original post by sabahshahed294)
    IAL Unit 5 papers are depressing. :sigh::sad: I did two of them and I feel like I know nothing! :'(
    exactly! are they meant to be harder or what? it made me feel so unprepared.
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    (Original post by Don Pedro K.)
    Ayman! Chemistry is his 4th subject?!?! Wat the flipping heck xD He's on a whole 'nother level hahaha
    Thanks I guess haha, Hope unit 5 goes well for you, as well as all the other annoying exams next week
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    To be honest, I'm not gonna bother with the IALs. We only have 3 days or something until our exams and I have UK ones still to do + I don't want to be demoralised so close to the exam.. XD
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    (Original post by samb1234)
    Thanks I guess haha, Hope unit 5 goes well for you, as well as all the other annoying exams next week
    Thanks mah dood! You too
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    (Original post by Don Pedro K.)
    To be honest, I'm not gonna bother with the IALs. We only have 3 days or something until our exams and I have UK ones still to do + I don't want to be demoralised so close to the exam.. XD
    im thinking of doing the same thing, but why are the ial exams so hard?
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    When making benzendiazonium should the temp range be 0-5 or 0-10


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    (Original post by Supermanxxxxxx)
    When making benzendiazonium should the temp range be 0-5 or 0-10


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    i usually just say at 5 lol
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    [QUOTE=Supermanxxxxxx;65905062]When making benzendiazonium should the temp range be 0-5 or 0-10


    0-10
 
 
 
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