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# AQA AS Chemistry unit 1 resit May 27th 2016

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1. (Original post by oweneagle)
Went through a paper with my teacher and got the yield to be 79.2%
It couldn't have been that
For the last question would u have to write it in grams of kg
It didn't specify, so either - I did both.
3. how many marks would i drop for the percentage yield question? i did 1090/2278.56 x 100 = 47.8%
4. Will it matter to my grade if I post pics of the questions on here, went to my teacher afterwards and saw the calculation questions for the section B
5. Anyone else get 16.6 for the %Yield question?
6. (Original post by MacRevision)
Anyone else get 16.6 for the %Yield question?
Nope
It was 49.30%

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7. (Original post by oweneagle)
Will it matter to my grade if I post pics of the questions on here, went to my teacher afterwards and saw the calculation questions for the section B
8. (Original post by Louisss)
how many marks would i drop for the percentage yield question? i did 1090/2278.56 x 100 = 47.8%
Possibly 2 marks

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9. (Original post by Louisss)
Like I found the percentage yield to be 25% but then went through it and got 79% I'm so confused
10. (Original post by oweneagle)
Like I found the percentage yield to be 25% but then went through it and got 79% I'm so confused
11. (Original post by User2334541)
Couldn't you argue that it was Argon? Argon has 8 electrons in it's outer shell and when 6 are ionised and removed, it sees a huge spike in ionisation energies as the next two being removed are from the 3s orbital?
I hope this helps clarify anything
I wasn't sure of the answer either
12. (Original post by oweneagle)
Will it matter to my grade if I post pics of the questions on here, went to my teacher afterwards and saw the calculation questions for the section B
13. for the balancing equation questions, if you got the other products right but they aren't balanced, do you get 1/2?
14. yes I got 49.3 would I get full marks?
15. How did everyone find the exam overall? Harder or easier than past papers?
16. (Original post by oweneagle)
Will it matter to my grade if I post pics of the questions on here, went to my teacher afterwards and saw the calculation questions for the section B

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17. (Original post by RME11)
The conc & vol of the solution was 5moldm-3 & 3m3, You had to change the 3m3 into dm3 first so you ended up with 3000dm3

moles = conc X vol = 5*3000 = 15,000 moles h3po4

Ratio P4O10 to H3PO4 was 1:4 therefore 15000 moles h3po4 = 3750 moles P4O10

Mass = moles * mr = 3750 * ((31*4)+(10*16)) = 1065000g = 1065KG.
Wouldn't it be 1.065 Kg?
18. (Original post by alevez2ez)
How did you guys fail last year? The foundation Chemistry paper (AQA paper 1) was the easiest paper from 2011-2015.

Did you let the stress get to you or what?
Only a certain number of people get the top grades. if its easy grade boundaries will raise. you're not a very logical thinker....
19. (Original post by emsieMC)
thing is I'm wearing out of date contact lenses so they're not quite clear. I misread the period 3 as period 2 . Can I do anything about this?
I somehow doubt it.. That should have been addressed before you went in, not just when you get a question wrong
20. (Original post by rbkbball)
Only a certain number of people get the top grades. if its easy grade boundaries will raise. you're not a very logical thinker....
It's obvious that the grade boundaries would rise

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