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OCR Chemistry B (Salters) F334/F335 Exam Thread 2016 (14th/22nd June)

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Reply 460
Avatar for _MAT_
_MAT_
2
Original post by onsmirnov
I think there were three isomers since there were two alkene bonds:
E and E
Z and Z
E and Z
but not Z and E since its symmetrical about the centre to Z and E = E and Z


Two alkene bonds but the two inner carbons only had one hydrogen on hence why I think there's only two
For the orders

I swear it was zero order for (br03-) and first orders for the others?

right
Original post by charmantell
What year was the hardest F335 paper, in your opinion?


June 2014
Original post by Kira Yagami
For the orders

I swear it was zero order for (br03-) and first orders for the others?

right
Yes - I got that
Original post by geor_thor
Yes - I got that


It was first order for both Br- and BrO3- and second order for H+
Original post by _MAT_
Two alkene bonds but the two inner carbons only had one hydrogen on hence why I think there's only two

I only did two isomers but to be honest I only had enough room to draw two isomers
Reply 466
Avatar for IBerrr
IBerrr
2
Original post by _MAT_
Two alkene bonds but the two inner carbons only had one hydrogen on hence why I think there's only two


Look at the pic of the isomers for that answer I sent in this thread.
Is there hitter video out yet?
Original post by Imtheish
Is there hitter video out yet?


https://youtu.be/jrxWSF6L-lc
4 points:
1. what a sh** paper
2. i got got got 2 e/z isomers
3. what is the type of copolymerisation
4. definitely a sh** paper
Reply 470
Avatar for SSD07
SSD07
3
Is there a group chat for F335 ?? Really need to nail it as found f334 so hard
Original post by Marli-Ruth
E cell was -0.26 V

Need to have the minus sign to get the mark.


Why is it minus? The question said the charge is the same for the opposite tank, so both tanks are positive?
This correct?
Original post by Kira Yagami
This correct?


It is but did they mention they added water though? I just did the me hnism for nucleophilic addition leaving the anion produced as it were

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Original post by Kira Yagami
This correct?


And isn't the lone pair of electrons from the nitrogen

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Original post by Marli-Ruth
UMS grade boundaries are out for this exam/year already


link please? :smile:
Original post by lyricalvibe
And isn't the lone pair of electrons from the nitrogen? It attacks the c=c bond producing no double bonds and an O-

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Posted from TSR Mobile
Someone make an f335 group chat
Original post by Tralph123
link please? :smile:


How can they be out already ?!??
Reply 479
Avatar for millss
millss
3
the grade boundaries are already out?? where?? i thought they only made them once all the papers had been marked :frown:

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