OCR B Salter's Chemistry by Design F335 - 15th June 2015

Someone uploaded it onto google drive https://drive.google.com/file/d/0B-EbxUSm2w_1X00yT2hRN0VvdFU/view


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So I'm going to lower the grade boundary...

Does anybody know if you can use pencil for drawing full structural formula? It's sort of a diagram isn't it?

Please can someone help me with the June 2014 n.m.r
I don't understand the last points in the mark scheme

4. two CH3 groups on one C / two CH3 in same environment
5. CH attached to O/ CH-O/ O-CH (5.0)OR CH next to carbon(s) with many/six H (5.0)
6. CH3 attached to C=O (2.0) OR CHC=O OR CH3 next to carbonwith no H

How on earth do you get that from the spectra
I feel like I can't even read the chemical shifts ont the data sheet properly

Does anybody know if you can use pencil for drawing full structural formula? It's sort of a diagram isn't it?

I get the proton equivalence because there are only 3 peaks but 5 carbons, then i used the data sheet to see what type of environment it was but i have no idea on how to do the rest try and go over it with a teacher tomorrow?

How do we convert 41 marks out of 45 in chemistry coursework to ums?

Does anyone get part 2?

pKa is equal to pH so just -log of the Ka i think

the answer is 2.73 and the pKa thing gives 3.03

does anyone have the june 2014 f335 paper please??

holy crap, i've never felt so under pressure, i have geography on the same day and then another exam the day after, if f335 is anything as bad as f334 there is literally no hope for me...