I thought it went very well but the rest of my class thought it went badly. I think I only lost marks where it was me being stupid rather than me not knowing the answer. There was a lot of extended writing which I normally don't like but I felt the ones today were fine.
Aargh I found it horrible! Worse than most past papers I've done What did people do for the question about a test to determine between the two different molecules, think it was methylchlorobenzene and 1,4-chlorobenzene?
Something around 70? I did it in such a rush not sure if I messed up! and for that one, I did silver nitrate test, the one would produce white ppt the other wouldn't x
Aargh I found it horrible! Worse than most past papers I've done What did people do for the question about a test to determine between the two different molecules, think it was methylchlorobenzene and 1,4-chlorobenzene?
I'm not sure but I did the halogen test from ch2 . NaOH, HNO3 and silver nitrate. White precipitate for (methylchloro)benzene and the other wouldn't react with it as the aromatic c-Cl is too strong to form Cl ions.
I'm not sure but I did the halogen test from ch2 . NaOH, HNO3 and silver nitrate. White precipitate for (methylchloro)benzene and the other wouldn't react with it as the aromatic c-Cl is too strong to form Cl ions.
Ahh damn, I forgot the NaOH, couldn't think what it was! should get some marks for the rest of it though, thanks!
Aargh I found it horrible! Worse than most past papers I've done What did people do for the question about a test to determine between the two different molecules, think it was methylchlorobenzene and 1,4-chlorobenzene?
I said add NaOH to both. Chloromethylbenzene would form NaCl salt, which would appear as a white precipitate, the other wouldn't react because it would be a OH- nucleophile attacking the benzene ring which would repel them... Something along those lines. Probably bull****
Something around 70? I did it in such a rush not sure if I messed up! and for that one, I did silver nitrate test, the one would produce white ppt the other wouldn't x
Yea 60-70g area, I can't remember exact though. I had 73 for the Mr of B.
I said add NaOH to both. Chloromethylbenzene would form NaCl salt, which would appear as a white precipitate, the other wouldn't react because it would be a OH- nucleophile attacking the benzene ring which would repel them... Something along those lines. Probably bull****
for the cl on the benzene i said add warm NaOHto produce an alcohol on the chloro methyl but no reaction on the di chloro benzene as the cl was part of the delocalised system.
I dunno, sounds pretty sensible ahah! I've come to realise that I am useless at chemistry -.-
What did people get for A, B, C and D in the flow diagram?
From left to right I can't remember which letter was which. I think for A I had a nitrile, B an amine, C carboxylic acid and D an alcohol. Again c and d might be the other way round I can't rememberer if c was the bottom left or if it was D.
From left to right I can't remember which letter was which. I think for A I had a nitrile, B an amine, C carboxylic acid and D an alcohol. Again c and d might be the other way round I can't rememberer if c was the bottom left or if it was D.
for the cl on the benzene i said add warm NaOHto produce an alcohol on the chloro methyl but no reaction on the di chloro benzene as the cl was part of the delocalised system.