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

Chemistry Edexcel A Level Paper 1 2018

does anyone have any predictions tomorrow or any last minute tips you would like to share? thought i would start a thread for everyone: also I think maybe fuel cells will show up.

Scroll to see replies

Reply 1

rwsb9

Original post by biohalle

does anyone have any predictions tomorrow or any last minute tips you would like to share? thought i would start a thread for everyone: also I think maybe fuel cells will show up.

same i think fuel cells will come up, maybe alcohol fuel cells too

Good Luck Everyone!

Well there goes that xD

So.....

What did everyone think?

Reply 6

twentystraveller

What was salt A and the diatomic X question??

Reply 7

ZoeLilo

Original post by jasminenctang

What was salt A and the diatomic X question??

i got ammonium bromide and oxygen for X2

Reply 8

akash3141

Original post by ZoeLilo

i got ammonium bromide and oxygen for X2

Yes it was.

Reply 9

username4064320

What value did u guys get for K in the delta g question?

Reply 10

GrandMedic

Original post by Guest086

What value did u guys get for K in the delta g question?

A really big number. That's all I remember.

Annoyed I wrote Nh4Br instead of ammonium bromide. Didn't see that they wanted the name. :/

Reply 11

akash3141

Original post by Guest086

What value did u guys get for K in the delta g question?

Something really high and negative I think. Can't remember off the top of my head but you had to use Delta G = - R x T x ln(K)

Reply 12

akash3141

Original post by Hetty16

What did everyone think?

I messed up the last question, last part. Also, messed up the enthalpy of neutralisation and I got the salt bridge stuff and half cell labelling somewhat incorrect.

I don't think I lost too many marks apart from all the errors above but taking stupid mistakes into account, i'd probably say I got high 60's/ low 70's out of 90, which is definitely an A, I think lol

Reply 13

Ani__pa

Same, do you think we would of got the mark for putting NH3Br

Reply 14

Ani__pa

same I put NH3Br do you think we will still get the mark

Reply 15

Ani__pa

Can someone put up the unofficial mark scheme and awnsers to all the Qs please

Reply 16

rebeccalef

i don't think so because the formula for it is NH4Br so NH3Br would be incorrect

Reply 17

GrandMedic

Original post by akash3141

Something really high and negative I think. Can't remember off the top of my head but you had to use Delta G = - R x T x ln(K)

Negative? I think it was positive because delta H was -60 kJ. This is the only question I remember the numbers for.

e^(60000/700*8.31) which comes out at 30k or something.

Reply 18

GrandMedic

Original post by Ani__pa

Can someone put up the unofficial mark scheme and awnsers to all the Qs please

I don't think NH3 would be right since it's not a cation.

Here's the unofficial mark scheme (so far)...
https://www.thestudentroom.co.uk/showthread.php?t=5412320&page=2#post78094986

Reply 19

akash3141

Original post by GrandMedic

Negative? I think it was positive because delta H was -60 kJ. This is the only question I remember the numbers for.

e^(60000/700*8.31) which comes out at 30k or something.