Edexcel A2 Chemistry Exams -6CH04 (14th June) and 6CH05 (22nd June) Discussion Thread

Reply 1000

Supermanxxxxxx

5

Original post by Don Pedro K.

Yeah it was 4.02. I got that wrong lol.

I got 4.03 damn it

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Reply 1001

Cpj16

15

Original post by Don Pedro K.

I put that if you had too much phenol you wouldn't be able to measure initial rate or something like that.

exactly cause it would react with the bromine

Reply 1002

MacroniCheese

2

Original post by Funky_Giraffe

What did you guys put for why you only use a relatively small amount of phenol?

I think it was due to the fact that you wanted the INITIAL RATE so that's when t=0. If you had a large amount of phenol you would not see a colour change quickly so it wouldn't be the initial rate? Something along those lines is what I put

Reply 1003

Don Pedro K.

9

Original post by Supermanxxxxxx

I got 4.03 damn it

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Oh wait sorry it was 4.03 haha

Reply 1004

scrlk

7

Diprotic titration cuve question was hard, rest of the paper was OK though.

With the NMR spectra question, I drew the right peaks (TMS reference, singlet, triplet and quartet) but I swapped the position of one of the peaks. How many marks do you think I'd lose?

Reply 1005

Science&Despair

1

Original post by jess.olo

I think I got 4.03 or something like that :frown:

!!

yeah me too

Reply 1006

Sebastian2597

1

Original post by krishanj

For the pH of the acid using Ka1?

Yeah

Reply 1007

Don Pedro K.

9

I definitely found this paper harder than any of the past papers :/

Reply 1008

C0balt

16

Original post by scrlk

Diprotic titration cuve question was hard, rest of the paper was OK though.

With the NMR spectra question, I drew the right peaks (TMS reference, singlet, triplet and quartet) but I swapped the position of one of the peaks. How many marks do you think I'd lose?

I don't think you'll lose any mark for not scaling correctly as long as you state the area ratio
I didnt draw TMS reference but I don't think it matters does it

Reply 1009

Cpj16

15

Original post by Supermanxxxxxx

I got 4.03 damn it

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no wait I 4.3 as well why is it wrong?

Reply 1010

Don Pedro K.

9

Original post by scrlk

Diprotic titration cuve question was hard, rest of the paper was OK though.

With the NMR spectra question, I drew the right peaks (TMS reference, singlet, triplet and quartet) but I swapped the position of one of the peaks. How many marks do you think I'd lose?

Same. We probably lost 1 mark tbh.

Reply 1011

Don Pedro K.

9

Original post by Cpj16

no wait I 4.3 as well why is it wrong?

You're not wrong :smile:

Reply 1012

C0balt

16

Original post by Funky_Giraffe

@C0balt how do you know when you have an excess ?

I am not sure. I said no new precipitate appears if you add excess...

Reply 1013

jess.olo

7

Original post by Don Pedro K.

I definitely found this paper harder than any of the past papers :/

I thought this too! but people are saying it was quite nice! what do you think the grade boundary for A* will be!?

Reply 1014

Don Pedro K.

9

Original post by C0balt

I don't think you'll lose any mark for not scaling correctly as long as you state the area ratio
I didnt draw TMS reference but I don't think it matters does it

I didn't draw TMS either. I got the peaks the wrong way round for the quartet and singlet so my area ratio was technically incorrect (but the numbers were correct in relation to my diagram). So I would probably lose one mark right?

Reply 1015

robinfairy978

1

Original post by scrlk

Diprotic titration cuve question was hard, rest of the paper was OK though.

With the NMR spectra question, I drew the right peaks (TMS reference, singlet, triplet and quartet) but I swapped the position of one of the peaks. How many marks do you think I'd lose?