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

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Avatar for Nayam
Nayam
Original post by samb1234
Thought I may as well set up the thread now since no one else had. Some stuff that people might find useful:

Chemguide - http://www.chemguide.co.uk/ (high quality in depth notes on most of the topics)

Chemrevise- http://chemrevise.org/3-edexcel-revision-guides/ (short and concise notes for each topic)

Specification - http://qualifications.pearson.com/content/dam/pdf/A%20Level/Chemistry/2013/Specification%20and%20sample%20assessments/9781446910696_GCE_Lin_Chemistry_Issue_6.pdf

Papers - http://www.physicsandmathstutor.com/past-papers/a-level-chemistry/edexcel-unit-4/

http://www.physicsandmathstutor.com/past-papers/a-level-chemistry/edexcel-unit-5/

(has all the papers currently on edexcel website, as well as the IAL papers in one place)

If anyone else has some good links I have missed, please let me know and I will add them to the op.

Feel free to use this thread for any questions you may have, but please remember that you are not allowed to ask for details of practicals and anyone doing so will be reported.


hey guys i know im stupid for even asking. i had some problems and i have studied nothings and the unit 5 exam is literally tomorrow. any predictions for what might come so i can touch those topics as far as i can for now so i could atleast get away with half dent marks. please help!!!!
Original post by Wunderbarr
I'm just going to say yes to aldehydes and ketones xD

Someone else may be able to clarify because I'm at the point of using the old tactic of hoping some things won't come up tomorrow :tongue:.


Lol snap xD I seriously hope our paper isn't as hard as the IALs...otherwise I am seriously doomed.
do we think much redox will come up?
I had noticed that I usually got lower scores on the ials.... are they purposefully made harder?
For this question, does it mean that the mole ratio between Methoxy group and S2O3 2- is 1:6 ?
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Original post by PlayerBB
For this question, does it mean that the mole ratio between Methoxy group and S2O3 2- is 1:6 ?


Indeed
Original post by MacroniCheese
Indeed


Thank you! Should we apply this every time we there is more than two equations because like the questions always used to give two equations, the first involved the formation of Iodine and the second the formation of Iodide that reacted with S2O3 2- and according to the reactant the mole ratio was not always 1:2 ?
Original post by Wunderbarr
Would seem veeery unlikely.


oh damn I'm screwed so bad

i think we can
Resits in AS and A level qualifications For AS and A levels we proposed that:

•

Students taking AS and A levels in the last scheduled sitting should have theopportunity to resit these qualifications after the final scheduled award,regardless of the subject and exam board.

from gov site

(edited 7 years ago)
Original post by PlayerBB
For this question, does it mean that the mole ratio between Methoxy group and S2O3 2- is 1:6 ?


So why is 1 :6 ?

Or anyone else?

Need to go to sleep soon :colondollar:

EDIT: Never mind I just figured it out :smile:
(edited 7 years ago)
is anode negative ? and cathode positive
Happy hunting tomorrow everyone :biggrin:

May success be thermodynamically feasible and kinetically unstable !
Reply 1931
Avatar for Z.e.e
Z.e.e
7
Original post by ilovecake123
is anode negative ? and cathode positive


yes
Reply 1932
Avatar for dj3k
dj3k
9
Original post by Don Pedro K.
Lol snap xD I seriously hope our paper isn't as hard as the IALs...otherwise I am seriously doomed.


I know right! Glad I'm not the only one who finds those papers HORRIBLE!!! Like 90% of it is application of knowledge!
Could somebody please please post the Jan 2016 IAL paper mark scheme if they have a link? Thanks!
Original post by ilovecake123
is anode negative ? and cathode positive


In electrochemical cells yes :biggrin:
Reply 1935
Avatar for dj3k
dj3k
9
Original post by Summer199
Could somebody please please post the Jan 2016 IAL paper mark scheme if they have a link? Thanks!


Here you go! This was a REALLY HARD paper btw. (as are all the IAL papers)
Chem Unit 5 IAL Jan 16 MS.pdf276.1KB
Original post by Summer199
Could somebody please please post the Jan 2016 IAL paper mark scheme if they have a link? Thanks!


Jan 16 MS
jan16chemms.pdf276.1KB
Original post by Don Pedro K.
In electrochemical cells yes :biggrin:


Hey Don, do you have any idea how to work out which electrodes are used to measure standard electrode potentials? Sometimes it's the metal of the solution of ions you have, sometimes it's Pt?! How are we meant to know lol :tongue:
If someone could explain these to me I would be eternally grateful :smile: From the IAL Jan 16 so if you're currently doing it no need to look as I have marked it - just not understanding why the answers are what they are and need some explanation for them :smile:
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Can someone please explain this question to me? Why don't we multiply the number of moles of chromium (II) ethanoate by two to get the number of moles of Cr2+? ImageUploadedByStudent Room1466547023.634203.jpg
ImageUploadedByStudent Room1466547034.548412.jpg


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