The Student Room Group
Uni students - Complete our survey >>
Uni students - Complete our survey >>
Uni students - Complete our survey >>

AQA Chemistry C3 - Unofficial Mark Scheme

Scroll to see replies

I dont agree with the bond energy answer swear it is -486.5 or something cause i checked 5 times
Original post by nisha.sri
Yeh i guess lol i put iron coz i got mixed up with the haber process lmao 😂😂😂
that's exactly what i did also for one side did you get 5 thousand something?!


oh I know so many people who did that so you're not alone! :biggrin:
Yeah one side was 5899 or something and the other was 4 thousand ish
I got something like 55.1J for the q=mcAT question but I don't know if its right (that number might not be exactly what I got but it's what I remember) :smile:
Original post by surina16
oh I know so many people who did that so you're not alone! :biggrin:
Yeah one side was 5899 or something and the other was 4 thousand ish


one side was 4017 or something the other was 449.. something
Will the grade boundaries be high or low compared to usual?
Original post by surina16
oh I know so many people who did that so you're not alone! :biggrin:
Yeah one side was 5899 or something and the other was 4 thousand ish


Same but i got 2 thousand something wtf ?!
Original post by davidb0wie
I got something like 55.1J for the q=mcAT question but I don't know if its right (that number might not be exactly what I got but it's what I remember) :smile:


What did you do ?How did you calculate it ?
Reply 347
Avatar for Ads.m
Ads.m
10
Original post by Babajide
Will the grade boundaries be high or low compared to usual?


Lst year was 40 for A* and that paper was easy, this year will probably be low 40s
Original post by Ads.m
Lst year was 40 for A* and that paper was easy, this year will probably be low 40s

51 a*
Original post by davidb0wie
I got something like 55.1J for the q=mcAT question but I don't know if its right (that number might not be exactly what I got but it's what I remember) :smile:


I got 3444J :rofl:

Spoiler

Reply 350
Avatar for Ads.m
Ads.m
10
Original post by Mahrez
51 a*


No chance.
Original post by nisha.sri
What did you do ?How did you calculate it ?


I did the mass of the alcohol x SHC x temperature change
But I don't know if I was supposed to do the mass of the water or the alcohol...

Actually I don't even know if I'm talking about the right paper here, it might've been on C2 lol I'm so mixed up :/
(edited 7 years ago)
Original post by Mahrez
51 a*


lmao no, definitely in the 40s
Original post by Ads.m
No chance.


FOR c2 and c3 would be 47
Original post by Francis197
What did every1 put for the fill in the grid question i put no change for all apart from a box on the top row where i put 'White precipitate' i think it was under calcium


No it was no change for them all except the first box on the top row because it contained chloride ions which create a white precipitate when added to nitric acid and silver nitrate
Original post by davidb0wie
I did the mass of the alcohol x SHC x temperature change
But I don't know if I was supposed to do the mass of the water or the alcohol...


The mass of alcohol was 0.8 right if so i did the same thing :smile: But it was 3 marks :redface:
Reply 356
Avatar for Ads.m
Ads.m
10
Original post by Mahrez
FOR c2 and c3 would be 47


C1, high 40s
C2 50
C3 low 40s
What conditions are needed for the greatest yield of ammonia? (2nd to last question).
C2 - 47/48
c3 - 43/44
Original post by hanzi12345
What conditions are needed for the greatest yield of ammonia? (2nd to last question).


High pressure and low temp 1000 atmosphere anf temp 250

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you