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Aqa chem 4/ chem 5 june 2016 thread

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CH3-O-C(CH3)2-CH2-CH2-OH
Is what i got for the last question.
Original post by Louiseelg0rt
Same but I thought it was a primary/secondary alcohol


Not sure (I didnt get this in the exam) but I think it might be CH2(OH)C(CH3)2CH2CHO

My structure I put was a total mess, I even forgot it was an alcohol at all...
(edited 7 years ago)
Original post by cowie
Why was it a primary or secondary? I could be wrong tbh


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cuz there was something about potassium dichromate turning green, so it's oxidized. so it can't be a tertiary alcohol? but that's what I drew :'( *sob*
At least polymers were nice.
Original post by K2Cr2O7
CH3-O-C(CH3)2-CH2-CH2-OH
Is what i got for the last question.


Same! I got this too :smile:

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What was the last one? If it's NOT a tertiary alcohol? Has anyone actually got it
That went well....

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Original post by Bacardigan
Not sure (I didnt getthia in the exam) but I think it might be CH2(OH)C(CH3)2CH2CHO


I don't think it can be this because it has to be a primary alcohol to be oxidised to green and the proton nmr is a much higher number for the H in CHO, the highest in the table was only 3.8 I think?

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Reply 628
Q5
Original post by RedNebula
Same! I got this too :smile:

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First i got the tertiary alcohol. But realised i couldn't be oxidised. :smile:
Original post by Louiseelg0rt
Same but I thought it was a primary/secondary alcohol


Oh no hang on I didn't get that, this is what I got:

HOCH2CH2C(CH3)2OCH3
Reply 631
Just a load of one mark questions that took too long.. Odd paper with relatively simple questions at times but it's stuff that has never EVER come up.. Not amused AQA - I am going through clearing
Original post by Examguy123
What everyone get for theire answers

For the ph one i got - 3.33
For the salt ethanoic one i got - 1.20
For the Kc one i got - 9.09x10^3?


Exactly what I got.

Also for diluted HNO3 I got 2.3 something.

Original post by YeezyYeezy
I hated that paper, hopefully the grade boundaries are low!
What pH's did everyone get?
I got 2.1 (something) and 2.3 (something)


I got 2.3 something.
Original post by RedNebula
Same! I got this too :smile:

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First i got the tertiary alcohol but realised it couldn't be oxidised. :smile:
Original post by dril
got the same for all of them!


i got 12 for the salt one
Original post by dril
got the same for all of them!


YEEEESSSSS!!!!!!!!

Virtual high five:tongue:
What was the number of peaks for lidocaine (carbon nmr)
Anyone know what happens to the rate equation if the experiment was repeated with 100x the concentration of ethanal but same concentrations of HCl and Iodine? I put that it would be the same...
Reply 638
that my uni dream over
what did people get for the most abundant peak?

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