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I finished my biology flashcards yesterday so now I'm condensing my chemistry notes. I woke up so late today though urgh

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Reply 4321

nomophobia

Going to do the June 2011 paper now

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Reply 4322

philo-jitsu

68/75 on core 4 silver 2, made stupid error and also didn't know area of a parallelogram....

dont know if ive got another paper in me.....may watch a film then come back, done 4.5 hours so far need a break i reckon

Reply 4323

Professor L

Finished my second chemistry paper and I was also doing a few NMR questions from different past papers, and I can do them quite quickly now :biggrin:

I'll practice some more NMR, then do another past paper

Reply 4324

nomophobia

Done and marked June 2011 paper, got 65/75 which was an A so I'm ok with that.

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Reply 4325

ranz

Original post by Kamara7

Finished my second chemistry paper and I was also doing a few NMR questions from different past papers, and I can do them quite quickly now :biggrin:

I'll practice some more NMR, then do another past paper

tips for nmr? i never get the final structure right?! also where else can i find practise qs

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Reply 4326

nomophobia

Gonna do Jan 2011 noe

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Reply 4327

Anon_98

Well, I'm still making my Biology notes; almost done with topic 6 then I'll move onto succession.

Reply 4328

Kittyboy

This is the week when pretty much all my exams are happening, yet I have so little motivation to work hard. I've spent most of today rewatching got.

Reply 4329

Professor L

Original post by ranz

tips for nmr? i never get the final structure right?! also where else can i find practise qs

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Have a structured attempt at the question. I always structure the big NMR questions like this:

The singlet/doublet/whatever at 2.7ppm is caused by a H (or a number of Hs if they give you the ratio of Hs for the peaks) in a R-CH (or something else, literally copying the structure the data sheet gives) environment adjacent to however many Hs (remember the n + 1 rule), then I draw what this peak tells me. If you analyse all the peaks like this, you should get a bunch of marks :smile:

(I always say how many peaks there are in total, and then that's how many H environments there are)

So for example: the triplet at 2.9 ppm is caused by 2 Hs in a C₆H₅-CH environment adjacent to 2 Hs:
C₆H₅-CH₂-CH₂-

Remember to use other clues in the Q as well, if it's an ester, then there should be a peak for HC-CO- for the H next to the C=O carbon.

For piecing the molecule together, look for things that overlap. Like if you found that two peaks suggest the structures CH₃-CH₂- and CH₃-CH₂-O-, then you can guess that the CH₃-CH₂- overlap.

More NMR Qs: https://www.tes.com/teaching-resource/ocr-chemistry-f324-module-3-nmr-practice-questions-6259747
(Make a TES account).

If you have any more questions, I'll try to answer them :biggrin:

(edited 7 years ago)

Reply 4330

Pokémontrainer

Ooooohhhhh noooooo. Done with anarchism (erm, for now... :erm:

) but the realisation that I have about 5 more ideologies (minimum) to cover is dawning upon me - why is this so hard. :cry2:

Now moving on to liberalism again :sigh:

- think I'll have to gamble a bit and skip reading revision notes and just cover every single essay that has come up. :work:

Reply 4331

Anon_98

yay, I've just completed all my Bio 4 notes.

:party:

Think I'm going to take a break now, then I'll start making my Chem 4 notes bc that's on Tuesday + I think biology memorisation/preparation can wait a little.

Reply 4332

AW97

Hey CONGRATS! Have you learnt any of unit 4 and 5 yet? Also may I ask what grades you're hoping for?

Original post by Anon_98

yay, I've just completed all my Bio 4 notes.

:party:

Think I'm going to take a break now, then I'll start making my Chem 4 notes bc that's on Tuesday + I think biology memorisation/preparation can wait a little.

Reply 4333

neuronim

going to write essay plans for NML and virtue ethics for philosophy exam on wednesday

Reply 4334

Anon_98

Original post by AW97

Hey CONGRATS!

Thanks! How's your revision going? :'3

Original post by AW97

Have you learnt any of unit 4 and 5 yet?

Ah no, but whilst I was making my notes, I think quite a lot of the information sunk in. I've yet to sit down + just memorise it all though + I can't learn Unit 5 until I've made the notes for that too, which I am planning to do after Chem.. maybe.

Original post by AW97

Also may I ask what grades you're hoping for?

Mmm, good ones. :colondollar:

Yourself?

Reply 4335

nomophobia

Didn't finish that D1 paper but I'm tired now so I'm off to bed.

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Reply 4336

Professor L

Done more NMR stuff and a chem legacy paper, overall not too bad :smile:

I realised that might need to make flashcards on model answers for questions which appear a lot just in case. Oh, also on more reactions other than those in organic synthesis. I'll do all that the day before the exam, it'll be fine. Tomorrow I need to revise EVERYTHING for the last psychology paper. I hope I don't wake up late.