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Aqa chem 4/ chem 5 june 2016 thread

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Reply 1100

Jojojuice

Original post by Scarly9

D is definetly 1 i had extra time and worked out k then put it into my own rate equation aha >_<

Yeah it was first order even though the numbers were so weird, all decimals

Reply 1101

1magicmo

Original post by unspokenhorse

The ch3 on the left would have a different value of chemical shift, so this can't be the case, as the groups aren't equivalent.

This is what I got :smile:

Reply 1102

Econ/Chem/FMaths

Grade boundaries Probably similar to last year so:
A*=85
A=78

Reply 1103

lishakb97

Original post by SnackAttack33

The NMR question had this answer:

chem answer.png

how? The question said that when warmed with acidified potassium dichromate it went green, meaning it had can't be a tertiary alcohol

Reply 1104

_newbe

Original post by SnackAttack33

The NMR question had this answer:

chem answer.png

It didn't that's a tertiary alcohol

Reply 1105

Jojojuice

Original post by Nancyeponine

There's no point the stitches one is a suggest so it's meant to be hard and it was on the syllabus anyway because the answer was it hydrolyses and so can he removed post surgery

Lol just hope they lower the grade boundaries

Reply 1106

MarimaKauser

Original post by 1magicmo

This is what I got :smile:

Me too!

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Reply 1107

Kaya22

Original post by cowie

ImageUploadedByStudent Room1465919833.201290.jpg

This was the answer to the last question.. (I got it wrong and drew it as a tertiary alcohol:/
The integration value of 6 with the CH3 included the one on the left..)
How many marks would I loose for tertiary alcohol? I'd imagine 1 for not mentioning it having to be primary or secondary, 1 for wrong product and 2 probably for an error in my working that showed a segment of R-C(CH3)2OH..
So most likely -3/4 what do you think?

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this is the wrong structure. it would have a doublet and there was no doublet

Reply 1108

nautella

Original post by Econ/Chem/FMaths

Grade boundaries Probably similar to last year so:
A*=85
A=78

nah mate, just nah.

Reply 1109

lahigueraxxx

OMG GUYS I asked for extra paper in the exam and I wrote down all of my information except for the date !!! This paper had most of the questions on it!! :frown:

What will happen??

Reply 1110

Caneloalvarez

Original post by PaddysChemistry

Anyone get OH-CH2-CH2-C(CH3)2-O-CH3 for 9?

Yeah well in Donny I got that too

Reply 1111

ELCRE

I only managed to get half way through the last question :frown:

anyone else?

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Reply 1112

Suits101

Original post by Anam

Okay so mine looked like this: ClCH2COCl+* = ClCH2O*(35Cl) + Cl*(37)

Probs wrong

I don't know, but if it works surely you should get some marks if not all?

Reply 1113

Matt0Schaffer

Original post by SnackAttack33

The NMR question had this answer:

chem answer.png

No it didn't that's a tertiary alcohol.

Reply 1114

1magicmo

Original post by MarimaKauser

Me too!

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wooo

yes

Original post by ELCRE

Guys would it be silly to make an official complaint to aqa? Some questions were just not fair such as the stitches one. Aqa are really playing with lives, they changed the wording and format of questions for the chem unit 2 paper (chucked in isa & Empa questions as well as one unit 5 question) & I let it go because I thought oh they mustve done it because its a resit paper but they have no excuse for this one.

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Complaining will do nothing for you or anyone else. People complain every year. EVERYONE had to answer the same questions as you. Dont worry about it. They are testing your APPLICATION of the knowledge.
Im sure you did a lot better than you think. The questions were not too difficult if you new both past paper technique and a good all round knowledge.

Dont fret! LIfes too short :wink:

Good luck with anymore exams

Reply 1117

Kay Fearn

Original post by tomharris15

I couldve sworn it was 8 peaks

Pretty sure it was 8 peaks..

Reply 1118

nautella

What is the lowest the grade boundaries have ever been, and do you think this year will be lower than that ? (or at least 71 for the A or some crazy sh*t)