AQA Chem Unit 1 May 22nd 2015 *OFFICIAL THREAD*

Original post by emma_1111

What grade would 51 raw marks be?

Probably a low B :smile:

Reply 1781

Rubberduckiller

Original post by emma_1111

what grade would 51 raw marks be?

b probably most likely

Reply 1782

WhoDaresWins

17

Worst CHEM1 paper I have done in my life.

Some of the question's were ridiculous.

Reply 1783

Azzer11

17

Does anyone know how many marks I'd lose for the pv =nrt calculation question. I wrote down 150,000Pa for the pressure in my working out but when I typed it into my calculator I STUPIDLY put in 15,000 so my answer was out by a factor of 10. Would it be one mark?

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Reply 1784

Original post by Jake97

Just wondered how many marks i would get on the percentage yield question for doing this:Mass NaN3= 550gMoles NaN3 = 550 / (23+42)
=8.461538461...Moles NaNH2 = 2 x 8.461538461 =16.9230769...Mass NaNH2 = 16.9230769 x (23+14+2) =660g660 x 0.95 = 627g (final answer)
Thanks!!

Yeah thats what I did!!!

Reply 1785

Original post by Azzer11

Does anyone know how many marks I'd lose for the pv =nrt calculation question. I wrote down 150,000Pa for the pressure in my working out but when I typed it into my calculator I STUPIDLY put in 15,000 so my answer was out by a factor of 10. Would it be one mark?

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I assume so :frown:

Reply 1786

Original post by WhoDaresWins

Worst CHEM1 paper I have done in my life.

Some of the question's were ridiculous.

Come we find the guy who wrote it and let him suffer for 1 hour and 15 minutes like we did.

Reply 1787

ChronicBoredom

3

[QUOTE="randoms132;56123555"]Because it stated the ion: N3- and so this has a -1 charge, Mg has a 2+ charge so the formula would be Mg(N3)2
times the (N3)2 and you get MgN6

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Magnesium nitrile is mg3n2 it says so on wiki though

Reply 1788

emma_1111

Last year 56/70 was an a so surely 51 would be a high b seeing as this paper was harder than last year?

Reply 1789

WhoDaresWins

17

Original post by AJeeeee

Come we find the guy who wrote it and let him suffer for 1 hour and 15 minutes like we did.

Lost a solid 19 marks :/
Will probs have to resit next year because 140 UMS in Unit 2 is unlikely.

Reply 1790

Original post by WhoDaresWins

Lost a solid 19 marks :/
Will probs have to resit next year because 140 UMS in Unit 2 is unlikely.

This was my resit, didnt go bad, but frustrating questions nevertheless and also 100UMS target is gone :frown:

Reply 1791

frances98

OP

19

Original post by emma_1111

Last year 56/70 was an a so surely 51 would be a high b seeing as this paper was harder than last year?

It might be a mid not high B

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Reply 1792

Lucasium

15

Do you think I would get the mark for saying a saturated hydrocarbon is a compound without a carbon carbon double bond?

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Reply 1793

Rubberduckiller

Can someone confirm what was the arrow had to be... Usually the -ve ions donotates as it has extra e-

Reply 1794

Thebest786

Original post by JRN-95

I really like chem 4 apart from the NMR crap and chem 5 has been a pain so far but a few days of solid revision should sort it out. How are you finding them?

They are OK, not too bad.

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Reply 1795

Original post by Thebest786

They are OK, not too bad.

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A2 guys, lets leave this thread and forget about UNIT1! Back to the CHEM4/5 thread.

Reply 1796

Datta10

3

Do you think I'll get a mark for saying distorted trigonal planar?

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Reply 1797

Glenda59

What do we predict grade boundaries?
Mine was awful!

Reply 1798

Glenda59

Original post by Datta10

Do you think I'll get a mark for saying distorted trigonal planar?

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I put the same!

Reply 1799

manik95