Year 12s: what will be the first way you research your future options? >>

OCR A2 CHEMISTRY F324 and F325- 14th and 22nd June 2016- OFFICIAL THREAD

Scroll to see replies

Reply 1460

Chem1stry101

Original post by Jehaan

I did a legacy paper and I think the answer said that it can't be split as it can't split itself if that makes sense

Split by the ch3 into a quartet

But not split by the ch2 as the env is identical

Reply 1461

Jehaan

Original post by Chem1stry101

Split by the ch3 into a quartet

But not split by the ch2 as the env is identical

Ah I forgot about the CH3 thanks!

Reply 1462

Chem1stry101

Original post by Jehaan

Can't be reduced by NaBH4, but can be reduced by other reducing agents

Reply 1463

SI 1

quick question when oxidising an aldehyde to a carboxylic acid do you have to heat under reflux???

Reply 1464

Chem1stry101

Good luck tomorrow with F324. I won't see the paper till Wednesday but will let you know what I think then

Reply 1465

Dannyboy2015

How is everyone feeling about this exam? I've being doing some last minute questions from the revision section on physics and maths tutor and it seems to be going pretty well, I think tomorrow I may go through a couple more NMR q's just before the exam as it seems to always be worth a ton of marks.

Reply 1466

Dannyboy2015

Original post by SI 1

quick question when oxidising an aldehyde to a carboxylic acid do you have to heat under reflux???

Yes.

Reply 1467

lai812matthew

Original post by GEEKSruletheworld!

Can carboxylic acids be reduced by NABH4 aswell?

Reply 1468

lai812matthew

Original post by rahma1994

also, do aromatics have a splitting patters?

yes

Reply 1469

lai812matthew

Original post by yoda123

Do u use pencil for displayed formula, skeletal, etc and do you have to use pencil

i use pen

Reply 1470

yoda123

Original post by Chem1stry101

Good luck tomorrow with F324. I won't see the paper till Wednesday but will let you know what I think then

are u that guy from twitter

Reply 1471

ranz

giys i know this has been asked before but is the hydrogen in the aldehyde can it produce splittings?

Posted from TSR Mobile

(edited 7 years ago)

Reply 1472

Chem1stry101

Original post by yoda123

are u that guy from twitter

Nope - not a guy ;-)

Reply 1473

Chem1stry101

Original post by ranz

giys i know this has been asked before but is the carbon in the aldehyde can it produce splittings?

Posted from TSR Mobile

Carbons don't split at all

Reply 1474

ranz

Original post by Chem1stry101

Carbons don't split at all

i mean hydrogen

Posted from TSR Mobile

Reply 1475

yoda123

Predictions from @ChemistryALevel
TLC/gas chromatography with nature of solubility is due.
Nucleophilic addition
C13 NMR
benzene ring structure
D2O
Triglycerides
Acid anhydrides
Synthesis always
Chiral C mirror images drawing in 3D
Phenol

Reply 1476

RayMasterio

Benzene ring structure, what does that mean :/

Reply 1477

yoda123

i think like c-c bonds same length, enthalpy of hyd lss exothrmic than expected, lower electron density and more stable so wont polarise br2 unless in presence of halogen carrier, pi electrons delocalised