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OCR F324-June 2013 Chemistry

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2/3 actually otrivine. We got the funtional groups correct but wrong way round...we get 2.
If u got one functional group wrong then its 1/3 :smile:

I see, so 2/3 marks then not bad, better than getting 0 or 1 :tongue:

Reply 3481

wakaas

How many marks would u think u would get for explaining the spectrums but not stating how many hydrogen enviroments and not getting the right structure out of 7?

Reply 3482

hussaincute

okay guys exams r finished now so everybody tell me where r u from, wat clg/school u go and wat uni r u going for wat course? :biggrin:

Reply 3483

D4rth

Original post by hussaincute

okay guys exams r finished now so everybody tell me where r u from, wat clg/school u go and wat uni r u going for wat course? :biggrin:

Wat

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Reply 3484

hussaincute

Original post by D4rth

Wat

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wat wat??

Reply 3485

Patel3000

Original post by LegendX

are a peak with seven is a heptuplet not a septuplet

Reply 3486

quickcooltiger

For drawing the other optical isomer question I replaced the wedges with solid lines- is this completely wrong?

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Reply 3487

Saurus95

Original post by thers

Overall a typical F324 paper. There were some easy questions, many average and some hard questions.

I think the grade boundaries will be:

A*-53
A-47 or 48
B-42
C-38
D-33
E-28

In comparison to Jan '13 F324, this was slightly harder so I agree with your predicted boundaries. The analysis question and the question about the diol, optical isomerism, NaBH4 reduction, etc. need some thought. As you say, a typical F324 paper.

Reply 3488

Paktriot

Unofficial mark scheme?

Reply 3489

Saurus95

Original post by quickcooltiger

For drawing the other optical isomer question I replaced the wedges with solid lines- is this completely wrong?

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This may sound horrible but you should assume the worst and assume you have lost that mark (and to be fair, the wedges are quite important if they are used in a question).

Reply 3490

Saurus95

Original post by wakaas

How many marks would u think u would get for explaining the spectrums but not stating how many hydrogen enviroments and not getting the right structure out of 7?

4-5 marks, depends on the extent to which your structure was incorrect and also, upon whether the structure is worth one or two marks.

Reply 3491

keepontrying

who edited the mark scheme with the highlighted yellow writing?

Reply 3492

keepontrying

did everyone draw the cyclic ester and h20 as the bi-product? 99% sure that's right

Reply 3493

Onkar-M

Original post by keepontrying

did everyone draw the cyclic ester and h20 as the bi-product? 99% sure that's right

yes you're good!

Reply 3494

sebi

I got 63.5 too as did lots of people I spoke to

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Reply 3495

keepontrying

Original post by Onkar-M

yes you're good!

yay, because someone on the mark scheme wrote by the side of it something else which didn't make sense but yay its fine aha

Reply 3496

Brad0440

Do people agree with the optical isomers on the mark scheme, or was it something else (I think I read a few people saying they swapped wedge lines for dashed or something?)?

Reply 3497

otrivine

Original post by Brad0440

Do people agree with the optical isomers on the mark scheme, or was it something else (I think I read a few people saying they swapped wedge lines for dashed or something?)?

will they accept 0.53 for the amino acid? I mean it depends on the ruler the person uses right?

what was the answer on the third monomer question 1 mark

Reply 3498

wakaas

Original post by Saurus95

4-5 marks, depends on the extent to which your structure was incorrect and also, upon whether the structure is worth one or two marks.

The structure was not correct at all but i wrote the explanation but didnt not write how many proton enviroments there how many marks do you think?
thanks

Reply 3499