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WJEC - CH2 (Wednesday, 23rd May) Properties, Structure and Bonding

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    I didn't see that you had to put 3 isomers for butene lols! so lost 2 marks there! and my gas syringe picture was weird! what does a gas syringe even look like ahahah! :P , so 2 marks there and 1 mark on that barium question! !!!
    But there were a lot of the big questions I didn't mind with the mechanisms etc!
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    (Original post by welshfrankie)
    I thought it was quite a nice paper! The three straight-chain isomers on butene was confusing. I could only work out two. Surely cyclo-butane doesn't count as a straight-chain isomer?
    You had the E and Z isomers of but-2-ene - it took me some time but it was worth it for an easy mark!

    I realised I'd made some stupid mistakes as soon as I left - probably need to have a good rest before physics on Friday!
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    Why are group 7 elements good oxidisers?
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    (Original post by Lost4468)
    Why are group 7 elements good oxidisers?
    i put down somethin stupid about oxidising stuff gaining electrons... and stuff....

    i did really bad i got propogation thing wron, gas syringe awful, that 5 mark question down the drain, handful of 1/2 mark question not answered... plus i writ tetrahedra instead of trigonal planor for the bf3!!! (very stupiddd mistake)
    few questions had no idea what it even meant and i writ that the colour for ba was red instead of green!!! (or was that beryliuym)... seee i failed
    and i didnt do the empirical formula for 1 question (ran out of time...)
    dont have anyyyy idea how i did for the structure questions...
    plus also failed the bonding questions.... (the one which asked for description/ explanation based on was it bf3 and nh3 joined??? & the one asked to label the alcohol with bonds and stuff???)
    by the way is diamond strong covalent???


    PLus when would we have the 'unoficial' markschme
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    by the way how many marks was the gas syringe??? and did we have to lael it or just draw it???
    cozzz i beiieve i drew it okay with the syringe (Not lookin like a syringe) downwards instead of horizontal...
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    (Original post by imconfused)
    by the way is diamond strong covalent???
    Yeah diamond is a giant covalent structure (uber strong bonds).

    That really was a long paper... Messed up on the Barium question and the third isomer and put trigonal (not the full trigonal planar)... Crap. I really needed a good mark in this one, but chemistry mark schemes puzzle me so much, especially WJEC ones, they never make any sense!
    Good luck with results everyone!
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    (Original post by mezlande)
    Yeah diamond is a giant covalent structure (uber strong bonds).
    Good luck with results everyone!
    I read that as "Good luck with the resits everyone" - it made me laugh!
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    (Original post by Lost4468)
    Why are group 7 elements good oxidisers?
    I said something on the lines of because they only need to gain one electron to. Have a full outer shell
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    (Original post by lisa_jeffers)
    I didn't see that you had to put 3 isomers for butene lols! so lost 2 marks there! and my gas syringe picture was weird! what does a gas syringe even look like ahahah! :P , so 2 marks there and 1 mark on that barium question! !!!
    But there were a lot of the big questions I didn't mind with the mechanisms etc!
    Did u draw the actual mechanism or just awnser the bullet point?
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    (Original post by imconfused)
    i put down somethin stupid about oxidising stuff gaining electrons... and stuff....

    i did really bad i got propogation thing wron, gas syringe awful, that 5 mark question down the drain, handful of 1/2 mark question not answered... plus i writ tetrahedra instead of trigonal planor for the bf3!!! (very stupiddd mistake)
    few questions had no idea what it even meant and i writ that the colour for ba was red instead of green!!! (or was that beryliuym)... seee i failed
    and i didnt do the empirical formula for 1 question (ran out of time...)
    dont have anyyyy idea how i did for the structure questions...
    plus also failed the bonding questions.... (the one which asked for description/ explanation based on was it bf3 and nh3 joined??? & the one asked to label the alcohol with bonds and stuff???)
    by the way is diamond strong covalent???


    PLus when would we have the 'unoficial' markschme

    What do u mean where do u get the unofficial mark scheme , never heared of it before


    Sorry don't know how to quote more than once in one post
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    I thought it was okay but I suspect that the grade boundaries will be higher this year- the average mark in past years has been 40 so I reckon that's why (to me) the format seemed different/perhaps a little easier.

    Kind of annoyed that I spent so long learning reaction mechanisms and didn't have to draw any!
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    (Original post by rsp)
    Did u draw the actual mechanism or just awnser the bullet point?
    No I didn't draw them you only had to answer the bullet points! bit gutted you didn't have to draw them but still they were nice
    Also ****ed up on the WHOLE page with barium and calcium! grim :/
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    Does anyone here have access to an exam paper? If so, would you be able to upload it, or send a scanned copy to me?

    I'm a mature, private candidate, so don't have access to the paper through teachers, but I'd like to just check whether my memory of the paper is worse than the paper itself!
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    (Original post by rsp)
    What do u mean where do u get the unofficial mark scheme , never heared of it before


    Sorry don't know how to quote more than once in one post
    i mean when like for bio some remember all the questions and come up with mark scheme...
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    (Original post by Snuffleupagus)
    Does anyone here have access to an exam paper? If so, would you be able to upload it, or send a scanned copy to me?

    I'm a mature, private candidate, so don't have access to the paper through teachers, but I'd like to just check whether my memory of the paper is worse than the paper itself!
    sorry I have a copy of the english paper so i can awnser any questons but i dont have a scanner.

    why are group 7 described as p block elements?
    can not believe it just realise i skipped a question accidently (dont ask me how) the one asking which halogen is the strongest oxidising agent and i know the awnser grrrr
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    (Original post by rsp)
    sorry I have a copy of the english paper so i can awnser any questons but i dont have a scanner.

    why are group 7 described as p block elements?
    Weirdly, I can't seem to remember much about the paper, so I can't really think of any specific questions to ask! Thank you, though

    I wrote that group 7 elements are p block elements because their outer electrons are in p-orbitals.
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    (Original post by Snuffleupagus)
    Weirdly, I can't seem to remember much about the paper, so I can't really think of any specific questions to ask! Thank you, though

    I wrote that group 7 elements are p block elements because their outer electrons are in p-orbitals.
    Yes! i wrote that too It was a good paper tbh, I messed up ch1 so hopefully if I do well in ch2, my grade would be higher!!
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    (Original post by welshfrankie)
    I thought it was quite a nice paper! The three straight-chain isomers on butene was confusing. I could only work out two. Surely cyclo-butane doesn't count as a straight-chain isomer?
    you thought it was nice!!!?? wow lucky you. I was hopeless on the questions, left about half blank.
    :stupido:
    One thing i find a bit irritating about the empirical formula questions, they almost never leave enough space there.
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    (Original post by mezlande)
    chemistry mark schemes puzzle me so much, especially WJEC ones, they never make any sense!
    I agree. I got my paper back after and went through my marks with miss. They actually missed two marks on mine probably wouldn't have made much difference though.
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    (Original post by shadow223)
    I agree. I got my paper back after and went through my marks with miss. They actually missed two marks on mine probably wouldn't have made much difference though.
    Still every mark counts.. I have had loads off these situation where I was one UMS of an A or marks even... like Biology, and Physics...

    So they better not be lazy this time.

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