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OCR F324-June 2013 Chemistry

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Original post by otrivine
well in the book and mark scheme their first option was HNO2

oh if the book says then your probably alright, it's just that i a reagent is something you can get out of a bottle kind of thing HNO2 is unstable and must be made insitu, don't worry it's only one mark, how did you find f325?
Reply 3141
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Gulzar
2
Original post by otrivine
yes that is acceptable

i remember they accepted either HNO2 or NaNO2


How did u find the exam otrivine :smile:
You have been working hard all year...I'm sure you did well :wink:
Reply 3142
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otrivine
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Original post by reneetaylor
Yep and yep :smile:


that question on the

thing

my answers

were

organe to green


2) so that it does not go to aldehyde
3) i put 2,4 DNP solution to give orange ppt ?

the reagnet I put aq NABH4?
Reply 3143
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Gulzar
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Original post by reneetaylor
Yep and yep :smile:


How did u explain the trans fats in CHD question?
Reply 3144
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otrivine
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Original post by Patel3000
oh if the book says then your probably alright, it's just that i a reagent is something you can get out of a bottle kind of thing HNO2 is unstable and must be made insitu, don't worry it's only one mark, how did you find f325?


not sure but the book put the phenylamine reacting with HNO2 and HCL?

it was alright and you
Reply 3145
Avatar for Gulzar
Gulzar
2
Original post by otrivine
that question on the

thing

my answers

were

organe to green


2) so that it does not go to aldehyde
3) i put 2,4 DNP solution to give orange ppt ?

the reagnet I put aq NABH4?


Yayy tick, tick and tick :biggrin:
Original post by Gulzar
How did u explain the trans fats in CHD question?


trans isomer so trans fats increase the levels of LDLS and HDLS so more cholesterol is transported to arteries and builds up leading to formation of atheroma
Reply 3147
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rukan
Original post by Jack9909
I initially thought there was a mistake on percentage yield as I thought the Mr given for compound e was wrong, talking to a friend after I realised I treated the bond coming out of the paper as an h when it was ch3, meaning the Mr of 160 was correct. I got 61.9 percent or something but I don't think that's right


i know i did the same i got 61.9 too :frown:
Reply 3148
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otrivine
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Original post by Gulzar
How did u find the exam otrivine :smile:
You have been working hard all year...I'm sure you did well :wink:


Thank you too :smile:

it was okay but harder than Jan 2013 for sure, so i am predicting boundaries of 47/47 for an A?


the structure did you get

the benzene first then ester and then the methyl stuff
Reply 3149
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otrivine
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Original post by Gulzar
Yayy tick, tick and tick :biggrin:


where it says name the reaction was it redox?
Original post by reneetaylor
You're probably right, I'm pretty sure I misunderstood that whole concept!

The only question which got me tbh, diazonium ion didn't click *_*

Thanks for explaining :smile:



I think its the way they put N2+ I was so confused but then it clicked :') So it's okay :biggrin:
Original post by otrivine
Thank you too :smile:

it was okay but harder than Jan 2013 for sure, so i am predicting boundaries of 47/47 for an A?


the structure did you get

the benzene first then ester and then the methyl stuff


I agree on prediction , !
Reply 3152
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otrivine
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14
The percentage question I got 63.2 I got the Mr of the compund G which was 174

and then did the moles divided by the moles
Reply 3153
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otrivine
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Original post by keepontrying
I agree on prediction , !


what was your diagram at the end for the structure

was it

the benzene first
Reply 3154
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Sly1
6
Original post by otrivine
yes that is acceptable

i remember they accepted either HNO2 or NaNO2

It has to be both. If you remember then why ask lol :smile:
Original post by otrivine
that question on the

thing

my answers

were

organe to green


2) so that it does not go to aldehyde
3) i put 2,4 DNP solution to give orange ppt ?

the reagnet I put aq NABH4?


Thank god! I put NaBH4 too!

Otrivine I was so silly on the third one! I put DCPIP instead of 2,4DNP! I was thinking about biology -_-! But I put something about the orange precipitate :smile:

For the second one, I think I got something slightly different but along those lines, can't really remember....

I found this exam okay! What about you?
Original post by otrivine
The percentage question I got 63.2 I got the Mr of the compund G which was 174

and then did the moles divided by the moles


Same!
Reply 3157
Avatar for Gulzar
Gulzar
2
Original post by otrivine
Thank you too :smile:

it was okay but harder than Jan 2013 for sure, so i am predicting boundaries of 47/47 for an A?


the structure did you get

the benzene first then ester and then the methyl stuff


YES that was exactly it. With 2 methyl groups.
It was definetly harder than January so I think it will be around 47-49 out of 60...but u can never be too sure let's hope for the best :biggrin:
Original post by otrivine
The percentage question I got 63.2 I got the Mr of the compund G which was 174

and then did the moles divided by the moles


I got this too! :smile:

I'm so confused cause people are getting like 69 or 70 :s-smilie:
Reply 3159
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otrivine
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Original post by Gulzar
YES that was exactly it. With 2 methyl groups.
It was definetly harder than January so I think it will be around 47-49 out of 60...but u can never be too sure let's hope for the best :biggrin:


yay!! is this structure correct people are some getting the other way round?

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