How are you feeling for unit 4? I'm getting around the high 70s atm.
pretty decent. In my mock ages ago got like 115, did like 2 papers a few weeks ago once i finished unit 4 notes and got around the same. Did the 2015 IAL one today and got 79/90 which somehow was full, but tbh there were areas where my knowledge was a bit patchy so I'll have to iron that out by next tuesday (i made some parts of my unit 4 notes like a month ago so forgotten some details). Sounds like you're pretty set if you're getting high 70s
pretty decent. In my mock ages ago got like 115, did like 2 papers a few weeks ago once i finished unit 4 notes and got around the same. Did the 2015 IAL one today and got 79/90 which somehow was full, but tbh there were areas where my knowledge was a bit patchy so I'll have to iron that out by next tuesday (i made some parts of my unit 4 notes like a month ago so forgotten some details). Sounds like you're pretty set if you're getting high 70s
Just have a few past papers to go but I feel like I need a lot more practice with NMR and spectrometric analysis because it's not always easy to see what's going on under exam conditions. Got any resources?
Just have a few past papers to go but I feel like I need a lot more practice with NMR and spectrometric analysis because it's not always easy to see what's going on under exam conditions. Got any resources?
@samb1234@Ayman! Can anyone tell me which part of this molecule gives rise to permanent dipole forces? Is it the C=C double bond?
It can't be the C=C bond as it's non-polar and there is literally 0 difference in electronegativity. C=O and O-H are the only polar bonds here, so it's probably the C=O bond that's creating a permanent dipole. I imagine that the strongest intermolecular force of attraction would be due to hydrogen bonds.
It can't be the C=C bond as it's non-polar and there is literally 0 difference in electronegativity. C=O and O-H are the only polar bonds here, so it's probably the C=O bond that's creating a permanent dipole. I imagine that the strongest intermolecular force of attraction would be due to hydrogen bonds.
Ah yes I didn't look at the COOH group as two separate bonds xD You're right haha
@samb1234@Ayman! Can anyone tell me which part of this molecule gives rise to permanent dipole forces? Is it the C=C double bond?
C=C double bond has no electronegativity though .Surely it would be the C=O I think ? By the way,why do all our exam boards write COOH instead of CO2H ?Surely saying COOH indicates there is a O-O single bond ?
C=C double bond has no electronegativity though .Surely it would be the C=O I think ? By the way,why do all our exam boards write COOH instead of CO2H ?Surely saying COOH indicates there is a O-O single bond ?
It is the C=O yeah. I don't know really I don't think it matters too greatly lol
Just have a few past papers to go but I feel like I need a lot more practice with NMR and spectrometric analysis because it's not always easy to see what's going on under exam conditions. Got any resources?
Yeah i hate the find the equivalent carbon type questions, always been bad at visualising shapes lol. There are tonnes of questions on PAMT as someone mentioned which I believe are from the old spec so maybe try them