OCR Chemistry A: Chains, Energy and Resources F322 - 09 Jun 2017 [Exam Discussion]

Hi everyone! This is the official thread for discussing the OCR Chemistry exam in June. How is everyone feeling about it? What topics are you most concerned about?

OCR Chemistry A - Afternoon (PM) exam - 9th June 2017

Specification

You can find the specification and sample assessment papers here.

Resources

TSR Chemistry Revision Library

Good luck!

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Reply 1

rhoxc

Might be the only one doing this exam

Reply 2

Jussicah

I thought I was the only one 😂

Reply 3

Tislam77

What did every one get for the pollutant

Reply 4

Ash8991

Original post by Tislam77

What did every one get for the pollutant

C3H6O for the molecular formula, think I did aldehyde for the structural mate, and you? Assuming I read the mass spec right, the mr of it should have been 58 or something? Using the IR spec, I think I only found C=O and no O-H bonds so it's either an aldehyde or a ketone

(edited 6 years ago)

Reply 5

sterlywhirly

Original post by Ash8991

C3H6O for the molecular formula, think I did aldehyde for the structural mate, and you? Assuming I read the mass spec right, the mr of it should have been 58 or something?

Yeah thats what I got as well.
Thought it was such a weird paper compared to past papers, anyone else?

Reply 6

Hayytch

Does anyone remember their numerical answers?

Reply 7

Tislam77

Original post by Ash8991

Yeah, I got the aldehyde propanal as one of the peaks was 29 so represented a CHO+

Reply 8

Tanishalaura

Original post by Ash8991

I drew structures for the aldehyde and ketone because it said possible structures i think?

Reply 9

Tislam77

Original post by Tanishalaura

I drew structures for the aldehyde and ketone because it said possible structures i think?

I'm pretty sure after identifying that it was an aldehyde or ketone with Mr of 58 you had to use the molecular ion peaks to see if it was an aldehyde or ketone?

Reply 10

Tanishalaura

Original post by Tislam77

I'm pretty sure after identifying that it was an aldehyde or ketone with Mr of 58 you had to use the molecular ion peaks to see if it was an aldehyde or ketone?

I forgot about ion peaks lool hope it will only be a mark or 2

Reply 11

JAJ10

Any predictions on grade boundaries? Isn't it just re-sitters in Northern Ireland that sat that exam?

Reply 12

Si_M

Original post by sterlywhirly

Yeah thats what I got as well.
Thought it was such a weird paper compared to past papers, anyone else?

That's what I said, it was weird paper

Reply 13

Elizajaynethorpe

does anyone have an unofficial mark scheme and/ or any idea of grade boundaries ?

Reply 14

Tislam77

Original post by Elizajaynethorpe

does anyone have an unofficial mark scheme and/ or any idea of grade boundaries ?

Assuming the grade boundaries will be really high since everyone taking this paper is a resit student

Reply 15

Elizajaynethorpe

But that would be the same as last year they take into account who is re-sitting as they know how much grades change when candidates have re-sat on previous years. Last years was re-sit only and the grade boundries were 83 for an A but don't know whether this years paper was easier ?

Reply 16

Tislam77

Original post by Elizajaynethorpe

I found this year's paper more difficult than last year's, hoping everyone else did too so that grade boundaries aren't too high 😅

Reply 17

Elizajaynethorpe

Same hope the grade boundaries are nice. Is anyone doing f324 or f325 resits as well ?

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Reply 18

Amber8

Original post by Hayytch

Does anyone remember their numerical answers?

I think I got something like 9.2% (might be slightly different) percentage yield and around 67% atom economy. Again both may slightly differ. Don't remember any other numerical answers at the moment. Can you think of any?

Reply 19

Amber8

Original post by Tislam77

I'm pretty sure after identifying that it was an aldehyde or ketone with Mr of 58 you had to use the molecular ion peaks to see if it was an aldehyde or ketone?