Edexcel AS Chemistry Unit 1 22/5/2015 Unofficial Mark Scheme

Lowest I could've possibly got for unit 1/2 is 68 on both papers.
Not bad but hopefully got a few marks here and there, didn't give myself marks on the weird questions like the drug testing.

Cheers for doing these.

Reply 21

C0balt

OP

16

Completed and now added photos :smile:

Reply 22

C0balt

OP

16

Original post by MrPenguinPerson

Thanks, any thoughts on grade boundaries?

I think Unit 1 will be one of the highest, but lower than last year due to the section on mass spectrometer.
I wouldn't be surprised if Unit 2 becomes the highest boundaries ever. My teacher said it was the easiest paper he's ever seen in his career :dontknow:

Reply 23

PointDexter

1

Original post by C0balt

I think Unit 1 will be one of the highest, but lower than last year due to the section on mass spectrometer.
I wouldn't be surprised if Unit 2 becomes the highest boundaries ever. My teacher said it was the easiest paper he's ever seen in his career :dontknow:

Really?!
Oh- seems like I'll be resitting unit 2 😢
I feel confident on unit 1 being 64 for an A,
But I can't call unit 2 - some say it was easy and others say it was harder than last year 😕
Thanks for the mark scheme btw x

Reply 24

C0balt

OP

16

Original post by PointDexter

Really?!
Oh- seems like I'll be resitting unit 2 😢
I feel confident on unit 1 being 64 for an A,
But I can't call unit 2 - some say it was easy and others say it was harder than last year 😕
Thanks for the mark scheme btw x

No problem :smile:

It might be only our school, because we have covered carbonate, flame test, shape, equilibrium etc so many times so the paper was a gift from god :yy:

Reply 25

ergo30

2

For the question regarding the effect of a higher charge on the peak, if I stated that the 'peak would have a smaller height due to a greater charge as this consequently results in greater charge to mass ratio' would I still get the mark? I didn't say that it would be halved :\

Reply 26

C0balt

OP

16

Original post by ergo30

For the question regarding the effect of a higher charge on the peak, if I stated that the 'peak would have a smaller height due to a greater charge as this consequently results in greater charge to mass ratio' would I still get the mark? I didn't say that it would be halved :\

I don't think you would. It is not about peak height but about the m/e value as stated in the question so talking about irrelevant thing wouldn't grant a mark
Greater mass to charge ratio is an incorrect statement as well :frown:

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Reply 27

ergo30

2

Original post by C0balt

I don't think you would. It is not about peak height but about the m/e value as stated in the question so talking about irrelevant thing wouldn't grant a mark
Greater mass to charge ratio is an incorrect statement as well :frown:

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I said charge to mass ratio not 'mass to charge' :\
Don't think I did too well, got about 70 on this paper but 62 in unit 2 :frown:

Reply 28

C0balt

OP

16

Original post by ergo30

I said charge to mass ratio not 'mass to charge' :\
Don't think I did too well, got about 70 on this paper but 62 in unit 2 :frown:

Oh I don't know then lol
That's not bad :redface:

isn't that an A? (I don't pay attention to boundaries so I have no idea lol)

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Reply 29

ergo30

2

Original post by C0balt

Oh I don't know then lol
That's not bad :redface:

isn't that an A? (I don't pay attention to boundaries so I have no idea lol)

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It's sort of on the boundary I think, unit 1 boundaries will definitely go up but no idea what the unit 2 grade boundaries will be like since people have had mixed feelings regarding the paper. Presumably, you have to get 65 for an A? That's what I thought any way, thanks for your help.