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# AQA AS Chemistry 7404/1 and 7404/2 - 27th May 2016 and 10th June 2016 Watch

1. (Original post by metrize)
What? What avout our score
"Unlike reformed GCSEs (which will use a 9 to 1 grading scale), we’re keeping the current A* to E grading system for reformed A levels (A to E for reformed AS). So what’s the challenge?First, the A* grade. The current rule is based on A levels that are made up of AS and A2 units. In reformed linear A levels, there is no need for such a complex rule, and no need for a ‘uniform mark scale’ either. A* will be another grade boundary that can be set by senior examiners (as for A and E) or set arithmetically (as for B, C and D)."
https://ofqual.blog.gov.uk/2015/08/1...2016-and-2017/

"UMS marks will not be used in the reformed AS, A-level and GCSE exams for first teaching in September 2015."

Im guessing its just a set mark for an A, B, etc. :/
2. (Original post by Pentaquark)
We dont get UMS for the new reformed A levels.
How would remarks work?
Surely our teachers get UMS?
3. (Original post by SM-)
Did anyone get 1.01 x 10^25 or number of molecules?
its 1.01x10^22 but yh i divided the mass by the mr and x the mole by avegadro's connstant
4. (Original post by matte17)
its 1.01x10^22 but yh i divided the mass by the mr and x the mole by avegadro's connstant
no it was ^25
5. (Original post by zigocarn)
How would remarks work?
Surely our teachers get UMS?
Not according to the AQA website.
Im not sure. Just raw marks I guess. :/
6. (Original post by Pentaquark)
"Unlike reformed GCSEs (which will use a 9 to 1 grading scale), we’re keeping the current A* to E grading system for reformed A levels (A to E for reformed AS). So what’s the challenge?First, the A* grade. The current rule is based on A levels that are made up of AS and A2 units. In reformed linear A levels, there is no need for such a complex rule, and no need for a ‘uniform mark scale’ either. A* will be another grade boundary that can be set by senior examiners (as for A and E) or set arithmetically (as for B, C and D)."
https://ofqual.blog.gov.uk/2015/08/1...2016-and-2017/

"UMS marks will not be used in the reformed AS, A-level and GCSE exams for first teaching in September 2015."

Im guessing its just a set mark for an A, B, etc. :/
ok thanks!!
7. Anyone got 1 square down when drawing the graph?
8. (Original post by Splaffie)
i plugged in some calculations, it was both a slower rate of reaction and it was exactly one square lower in terms of the final plateau
That is what I got too
9. (Original post by DaVinciGirl)
That is what I got too
i got 88.8% recurring for the percentage and 88.8recurring% of 9 is exactly 8, also the rate was reduced because less molecules less likely to undergo successful collisions
10. (Original post by Splaffie)
i got 88.8% recurring for the percentage and 88.8recurring% of 9 is exactly 8, also the rate was reduced because less molecules less likely to undergo successful collisions
Someone in the other unofficial markscheme thread is saying that the concentration was higher so there was an increase in successful collisions. Do you remember that?
11. (Original post by DaVinciGirl)
Someone in the other unofficial markscheme thread is saying that the concentration was higher so there was an increase in successful collisions. Do you remember that?
wow something i cant remember, I cant remember anything about concentration I just wrote about less moles
12. (Original post by Splaffie)
wow something i cant remember, I cant remember anything about concentration I just wrote about less moles
My friend is saying that the concentration decreased but I don't remember either.
13. Concentration increased from 0.6 to 0.8moldm-3

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14. [QUOTE=matte17;65650301]its 1.01x10^22 but yh i divided the mass by the mr and x the mole by avegadro's connstant[

I got 1.01*10^25
15. (Original post by DaVinciGirl)
My friend is saying that the concentration decreased but I don't remember either.
Ethanoic acid increased from 0.6 mol dm-3 to 0.8 mol dm-3 as @Moshe pointed out and there was excess of Mg?
16. (Original post by DaVinciGirl)
My friend is saying that the concentration decreased but I don't remember either.
How many marks is the graph and calculation?
17. YESS , the one where they give ethanol density right?
18. (Original post by rosemondtan)
How many marks is the graph and calculation?
2 Marks I believe.
19. How would Cambridge look at AS UMS if there is no UMS?
20. (Original post by DaVinciGirl)
2 Marks I believe.
Thank you!!

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