AQA Chemistry Unit 2 (resit) CHEM2 10th June

I put disadvantages as impure product and slow process is that right?

I was relating it to sodiums reaction with cold water bc i know that produces hydrogen which then burns with a yellow flame from the heat

Oh fk thought it was elimination damn ittttt!!!
Also thought the didn't we have to name the alcohols?

for the reaction with hcl and hclo formed from chlorine and water did i need to use double arrows to show that the reaction was reversible?

and also in regard to the why one would easily be distilled and the other wouldn't it was an aldehyde and a carboxyllic acid i think i mentioned vanderwaals instead of dipole dipole. so vanderwaals between one and hydrogen bonding between the other ....does anyone think my answer would be accepted

lastly for the last question disadvantages of fermentation i wrote co2 is produced, i forgot that this was in fact carbon neutral will i get 0 marks here?

advantages -- glucose is highly abundant - ethene must be manufactured first
-- cant remember

disadvantages - low yield
---- co2 produced greenhouse gas

Yeah we had to name the alcohols. So it was butan-2-ol and butan-1-ol

I almost made the mistake of naming the aldehyde and ketone too!

I think sodium burns yellow but the rest of that period burns white apart from sulphur so it had to be white?

But aldehydes have an O double bonded to a C, that O surely has two lone pairs it can use to hydrogen bond with?

Disadvantages would be: A slower reaction, a lower yield and a less pure yield so further processing needed

Advantages would be: Cheaper (as cheaper equipment, reactants and lower energy requirements), renewable and carbon neutral

Aldehydes would have dipole-dipole, not vdW, so you wouldn't get a mark for saying that, but you would probably get one for saying that there is hydrogen bonding between carboxylic acids so stronger intermolecular forces

No i meant the hydrogen burns (yellow) from the heat. Oh well anyway if im wrong im wrong thats my destiny

i thought it didnt ask for names as well? i wrote h3po4 and 300 degrees celsius is this wrong

For the two observations I put effervescence and white solid ppt

yeah we got it wrong, it was white flame and white ppt
We probs got 1 mark for white ppt

I also put that.. I went blank...
A similar question was in unit 5 last year or the year before and it said ignore effervescence...i know it's unit 5 but it's the same concept...so we probably got 1 mark

For the two observations I put effervescence and white solid ppt