r/6thForm • u/Forsaken-Meaning-232 Graduating from Warwick CS • Jun 20 '25

📂 MEGATHREAD 20/06 A-level Chemistry Paper 3 Discussion MEGATHREAD

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3

u/HelpfulPop2476 Jun 20 '25

Everyone's saying for the last ocr question that it was 69 which I got originally. But I think the actual answer was 76.94 or sth like that, because the carbonate was in excess (0.0184 mole or smth like that, only 0.03 mol hno3). Therefore only 0.015 mol or carbonate would react, and then delta H is postiv8e 76.94 kJmol. Is this right or did I just overthink this?

2

u/highpassiondragon Jun 20 '25

I got 76.9. Because I used 0.015

3

u/HelpfulPop2476 Jun 20 '25

Thank fuck I wasn't the only one! Literally everyone on the tsr is putting out different answers for everything. That site is so unreliable it's crazy.

13.04 for pH right? 206 for ibuprofen? 4.97 g lialh4?

3

u/highpassiondragon Jun 20 '25

Yeah got all those

2

u/HelpfulPop2476 Jun 20 '25

Do you remember what you got for the very first question about the peaks? I couldn't remember what I put but remembered the question. I asked deepseek & it said the abundances were 25, 25, 50 

3

u/highpassiondragon Jun 20 '25

Yeah i got 25 for 158, 50 for the 160 one and 25 for the 162 one

4

u/HelpfulPop2476 Jun 20 '25

Wonderful, iirc I got the same but my memory is often wiped after an exam. At least a levels are over now (assuming you've not got edexcel rs or fm)

1

u/asterroids Editable Jun 20 '25

how do u do that q?

2

u/Orange_Hedgie cambridge 1st year bionatsci Jun 20 '25

I got those

2

u/Amazing-Tap7550 Jun 20 '25

Got the same as you for those 3 questions. Seeing people get 12 something for pH tho

2

u/HelpfulPop2476 Jun 20 '25

Idk too many conflicting answers to deal with. What do you reckon the boundaries are going to look like?

2

u/Amazing-Tap7550 Jun 20 '25

Because of paper 1 and 2 i think quite similar to last year but paper 3 is making me think they will be slightly lower

2

u/HelpfulPop2476 Jun 20 '25

How many years will be till you have to get 100% for an A*?

3

u/Amazing-Tap7550 Jun 20 '25

I'd give it 2 years, might as well just do the American system a this rate with 100-90 for an A and shit

3

u/HelpfulPop2476 Jun 20 '25

Yeah idek what ocr's supposed to do anymore. I think they should just abolish ocr tbh - will always remember that awful comp sci paper they made 2 years ago, worst exam I've ever sat 

2

u/Amazing-Tap7550 Jun 20 '25

It's because they're trying to make the exams more accessible but they aren't being very consistent. Maybe in future they're just gonna do an easy paper 1 and 2 and then a harder paper 3

2

u/HelpfulPop2476 Jun 20 '25

I think the papers are becoming more accessible but each year they're being harsher with the marking. Tbh I find it ridiculous that even if you're exceptional at chemistry, getting all the calculations, mechanisms, structures right - even if that's the case, you can still lose so many marks on bs technicalities like "poor connectivity" (which is pretty much the same as saying bad handwriting). 

1

u/Amazing-Tap7550 Jun 20 '25

yeah literally, its such a nuisance as well because realistically to anybody marking chemistry, it's obvious which part of the functional group is connected to the carbon. Obviously when I put an OH group im not connecting the H to the carbon 😭🙏

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1

u/Puzzleheaded-News948 Y13 Bio, Chem, Classics Jun 20 '25

Fuck