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# CHY3H Unofficial Mark Scheme June 2012

Chemistry exam discussion - share revision tips in preparation for GCSE, A Level and other chemistry exams and discuss how they went afterwards.

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1. Re: CHY3H Unofficial Mark Scheme June 2012
(Original post by James_01)
you can't stoop down to my level because i'm above you and for your information good sir i attend Eton
I think this guy is mad that he done **** in the exam so he's misplacing his anger onto everyone else
2. Re: CHY3H Unofficial Mark Scheme June 2012
(Original post by James_01)
no you stupid person it was o.61 not 0.62 why the **** would you get the mark???????????
You might get marks for the working out.
3. Re: CHY3H Unofficial Mark Scheme June 2012
(Original post by ChemicalFreak)
sorry but can somebody explain to me how we were supposed to do 4cii and 4ciii (regarding the calculation questions) please?
Here you go!

4c) ii)

Volume of NaOH x Concentration of NaOH / Volume of Vinegar

(30.5 x 0.5 / 25)

= 0.61 mol/dm^3

4c) iii)

Concentration of vinegar x Relative formula mass of ethanoic acid

(0.8 x 60)

= 48 g/dm^3

a dm^3 is equal to 1000cm^3

1000 / 4 = 250

so

divide 48 by 4

(48 / 4)

= 12g (per 250cm^3)
4. Re: CHY3H Unofficial Mark Scheme June 2012
For the question about 100 degrees, would you get a mark for saying the temperature is too high?

What do people thing grade boundaries are likely to be? :')

And for question 2 about group 1, could you say, they all react with water to form an alkaline solution and they have have 1 electron in the outermost shell?
5. Re: CHY3H Unofficial Mark Scheme June 2012
(Original post by Zigggyy.)
For the question about 100 degrees, would you get a mark for saying the temperature is too high?

What do people thing grade boundaries are likely to be? :')

And for question 2 about group 1, could you say, they all react with water to form an alkaline solution and they have have 1 electron in the outermost shell?
Almost definatley!

Those two are better than the ones on the scheme ^^

(did you copy me? )
Last edited by michelfish; 24-05-2012 at 16:38.
6. Re: CHY3H Unofficial Mark Scheme June 2012
yea you can also say they are alkali metals :P i think

A* - 34
A - 31
B -26
C - 21
D - 18
7. Re: CHY3H Unofficial Mark Scheme June 2012
(Original post by michelfish)
Almost definatley!

(did you copy me? )

Ah, yes for both the question about temperature and my two points about group 1? If so, - WOOOO!
n'awww, thanks for the reassurance :') I'd rep you, but I've used my maxiumum for today.

Copy you? ahaha! Nope, did you make the same points? (':
Last edited by Zigggyy.; 24-05-2012 at 16:40.
8. Re: CHY3H Unofficial Mark Scheme June 2012
(Original post by Fas)
yea you can also say they are alkali metals :P i think

A* - 34
A - 31
B -26
C - 21
D - 18
9. Re: CHY3H Unofficial Mark Scheme June 2012
(Original post by Zigggyy.)
For the question about 100 degrees, would you get a mark for saying the temperature is too high?

What do people thing grade boundaries are likely to be? :')

And for question 2 about group 1, could you say, they all react with water to form an alkaline solution and they have have 1 electron in the outermost shell?
ZIGGGYY!!!!!!!!!!!!!!!!!!!!!!!!! hellllo again!!!

I think the grade boundaries will be low average.. it was mainly okay but there was the odd tough question so... 32 A* maybe
10. Re: CHY3H Unofficial Mark Scheme June 2012
(Original post by Zigggyy.)
Ah, yes for both the question about temperature and my two points about group 1? If so, - WOOOO!

Copy you? ahaha! Nope, did you make the same points? (':
You won't get a mark for "Temperature too high" though

Referance is needed to the fact that the water would boil
11. Re: CHY3H Unofficial Mark Scheme June 2012
Oh, and for the question 1c where we had to say why the results were shocking or whatever, I said that they decreased at 68 degrees, is that just completely wrong? I guessed, haha!

(Original post by g.k.galloway)
ZIGGGYY!!!!!!!!!!!!!!!!!!!!!!!!! hellllo again!!!

I think the grade boundaries will be low average.. it was mainly okay but there was the odd tough question so... 32 A* maybe
HEY! :')
How are you?

omg, the weather <3

Yeah, I was thinking 32-24 probably :')
12. Re: CHY3H Unofficial Mark Scheme June 2012
(Original post by michelfish)
You won't get a mark for "Temperature too high" though

Referance is needed to the fact that the water would boil
Awww, bummer.
Okay!

Thank you! :')
13. Well I thought C3 could've been much more difficult!
14. Re: CHY3H Unofficial Mark Scheme June 2012
would i get the mark for atomic spectroscopy?
and for the last question 'the energy needed to start the reaction?
15. Re: CHY3H Unofficial Mark Scheme June 2012
yea i put for last one, that the energy barrier needs to be overcome and thus will provide the minimum amount of energy needed to start the reaction - i remember doing a past paper question on that lol
16. Re: CHY3H Unofficial Mark Scheme June 2012
would i get a mark for saying that the water would start to vaporise?
17. Re: CHY3H Unofficial Mark Scheme June 2012
Whoops.. For the last question I wrote about the fire triangle (how a flame needs oxygen, fuel and heat to burn) so I said heat was needed as there was already fuel and oxygen..
18. Re: CHY3H Unofficial Mark Scheme June 2012
Wait till you get to A-level chemistry you jokers!

C3 - 100ums, AS Chemistry - might scrape a B!
19. Re: CHY3H Unofficial Mark Scheme June 2012
Easy exam, A* will be around 36 i think
20. Re: CHY3H Unofficial Mark Scheme June 2012
the banter that occurs in a forum

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