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OCR A2 CHEMISTRY F324 and F325- 14th and 22nd June 2016- OFFICIAL THREAD

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Reply 2040

My friend wrote his structures in pencil, will the pencil pick up for marking?

Yes i got a copy of my f322 back and i had drawn in pencil and you could see it on the scanned image, i also did all mine in pencil so i really hope so

Reply 2041

Timon512

Original post by sfarquhar0

I found 2015 very decent. This was horrible for me :c
Had to cry my pain out. Bye bye to an A

I personally don't think the grade boundaries will be much higher. OCR's new tactic is to put seemingly easy questions, but there are loads of places where you can lose a mark from being a tiny bit careless. Loads of people walked out confident but when they started talking about it, they all realised they lost quite a few marks.

Reply 2042

mattyk5

Original post by nicoleemmak

Yes i got a copy of my f322 back and i had drawn in pencil and you could see it on the scanned image, i also did all mine in pencil so i really hope so

It says in the front cover of the booklet that HB pencil may be used for diagrams, so it must be detectable

Reply 2043

sfarquhar0

Original post by anndz3007

this is what i did, it matched to formula so i think it's right

Same, should be correct hopefully

Reply 2044

jamesgates1

Original post by joe35678

how many peaks did the carbon nmr have, during the exam i didn't look at the question properly and said only 3 peaks so i said compound F was ch3ch2ch(oh)ch2ch3, how many marks would i lose out of 7.

I made the same mistake. If you got the carboxylic acid one correct and the correct ecf for the ester maybe minimum would be 2/7. I'd doubt more than 3.

Reply 2045

FluffyCommie

Original post by Ula456

I thought one of the H's was adjecent to a carbon with no H's so producing a singlet.

Nope, it was adjacent to a CH3 group and a CH2 group. according to the N + 1 rule that would generate a sextet.

Reply 2046

Timon512

Original post by garlicbread23

help, i got compound F wrong, will i get ecf and max one mark deduction????

I hope so. In other past papers they gave error carried forward. Seems unfair if you don't get ECR considering the other 2 structures are based on F...

Reply 2047

adetutu

Original post by mattyk5

I put Nylon and use in fabric, not sure though

I know it was Nylon but I couldn't think of a use so I panicked and put e.g. Kevlar and said it's used to make crash helmets. I didn't know if it was Nylon specifically or polyamides in general

Reply 2048

cr7alwayz

What did people get for the proton splitting table? Definitely got the peak area column right
Do you think they'll award marks for each correct column or for rows?

Reply 2049

Manliker

Who got what for the splitting patterns and the % yield one?

Reply 2050

Dentistry101

Where's the unofficial markscheme at???

Reply 2051

FluffyCommie

Original post by anndz3007

this is what i did, it matched to formula so i think it's right

Completely forgot about this question, but i'm pretty sure that's what i got :smile:

hopefully we're right

Reply 2052

fghj1

Original post by fghj1

Can the structure be CH3CH(CH3)CH(OH)CH3

Can someone help please?

Reply 2053

mattyk5

Original post by adetutu

I know it was Nylon but I couldn't think of a use so I panicked and put e.g. Kevlar and said it's used to make crash helmets. I didn't know if it was Nylon specifically or polyamides in general

Kevlar contains benzene ring, its benzene-1,4-diamine + benzene-1,4-dioic acid

Reply 2054

Spwoosh

Original post by anndz3007

this is what i did, it matched to formula so i think it's right

Exact same thing I got but I did it in skeletal formula.... Ffs I'm actually really scared I won't get the mark for it now because I also ****ed up elsewhere in the exam and I can't afford any more **** ups. Not even a mark because these boundaries are going to be the highest ever IMO

Reply 2055

lai812matthew

Original post by cr7alwayz

What did people get for the proton splitting table? Definitely got the peak area column right
Do you think they'll award marks for each correct column or for rows?

rows

Reply 2056

H_m007

Everyone's talking about how they got 2.66, Man like me got 26.6 (don't ask how lol). Probably lost about 4-5 marks though (hopefully :biggrin:

)

Oh and how many marks was the one about nylon 6,6 and its uses?

Reply 2057

FluffyCommie

Original post by adetutu

I know it was Nylon but I couldn't think of a use so I panicked and put e.g. Kevlar and said it's used to make crash helmets. I didn't know if it was Nylon specifically or polyamides in general

It asked for the TYPE of condensation polymer, so polyamide is the correct answer. If it were to ask for the NAME of the polyamide then nylon would have been acceptable...

Reply 2058

mattyk5

Original post by cr7alwayz

What did people get for the proton splitting table? Definitely got the peak area column right
Do you think they'll award marks for each correct column or for rows?