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

Anon12345678
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#261
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#261
I got 3 too.what did you out for the one about benzene, where we had to compare the Kekule structure with the ring structure?

(Original post by BrokenS0ulz)
Only about 7ish marks, they were hard too so I don't think many people will have got all of them. Don't worry about it .

What did everyone get for the number of isomers? I got three.
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Lissy14
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#262
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#262
unofficial mark scheme anyone?
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BrokenS0ulz
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#263
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(Original post by tealover96)
I got three too
Thankfully no crazy nmr!
I thought that 3 peak nmr thing was a bit weird, like I had to guess at it which I never like doing :s.
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ASDuh97
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(Original post by Anon12345678)
I got 3 too.what did you out for the one about benzene, where we had to compare the Kekule structure with the ring structure?
I said it doesn't undergo addition with bromine and turn colourless, which indicates there are no carbon-carbon double bonds as in an alkene, which was structure b. Also said some things about the formation of the ring and the area of delocalisation which makes it stable and more likely to undergo substitution.
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BrokenS0ulz
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(Original post by Anon12345678)
I got 3 too.what did you out for the one about benzene, where we had to compare the Kekule structure with the ring structure?
The A structure is used because it explains why benzene is more likely to undergo substitution reactions than addition. I talked about substitution retaining stability and addition losing it etc. Structure B suggests benzene would readily undergo addition but it doesn't, so A is better.
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ASDuh97
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#266
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#266
Did anyone say methanol for the reagent of that amide group turning into a methyl group and ammonia being given out?
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Millie0118
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(Original post by sweettooth123)
I got that as well!
How did you get that???
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johnny147
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(Original post by ASDuh97)
Did anyone say methanol for the reagent of that amide group turning into a methyl group and ammonia being given out?
I said NaOH
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Millie0118
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(Original post by BrokenS0ulz)
Only about 7ish marks, they were hard too so I don't think many people will have got all of them. Don't worry about it .

What did everyone get for the number of isomers? I got three.
I got 3
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username1082804
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(Original post by ASDuh97)
Did anyone say methanol for the reagent of that amide group turning into a methyl group and ammonia being given out?
I did!!
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diba786
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#271
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Did anyone get 12.22 for the PH?
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tealover96
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(Original post by BrokenS0ulz)
I thought that 3 peak nmr thing was a bit weird, like I had to guess at it which I never like doing :s.
Was that for drawing the structure?

Did anyone else feel like there was way too much drawing in that?
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diba786
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#273
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Did anyone got 12.22 for the PH?
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Millie0118
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(Original post by ASDuh97)
Did anyone say methanol for the reagent of that amide group turning into a methyl group and ammonia being given out?
I put h20?
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BrokenS0ulz
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(Original post by tealover96)
Was that for drawing the structure?

Did anyone else feel like there was way too much drawing in that?
Yeah and labeling E, F and G.
Yeah there was quite a bit of drawing
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ASDuh97
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#276
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There was an added methyl group, how could it be water or Naoh?
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BrokenS0ulz
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(Original post by ASDuh97)
Did anyone say methanol for the reagent of that amide group turning into a methyl group and ammonia being given out?
I put methanol! It was the only thing that I could think of that would work.
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Priya265
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#278
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(Original post by diba786)
Did anyone got 12.22 for the PH?
I got 12.0 but I dont know if thats right
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ASDuh97
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#279
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(Original post by diba786)
Did anyone got 12.22 for the PH?
Hmm I got 11.2 I think.
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tealover96
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(Original post by BrokenS0ulz)
Yeah and labeling E, F and G.
Yeah there was quite a bit of drawing

Ahh crap I completely forgot to label it! That was one mark, I'm hoping?
For the drawing I did alcohol on top and cl on the bottom of the benzene ring? Because I thought that was the only isomer with three H environments
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