AQA GCSE CHEMISTRY UNIT 2 HIGHER CHY2H January 2012 unofficial mark scheme

Seems good, looks like i dropped approx 3 marks, for the question about why nano particles are better, i put: because they would have a larger SA (for same volume) so the transfer of heat would increase. Did anyone else write something similar to this, and think that it is correct?

error not carried forward.

I've got 33/34, what grade am I looking at?

When a type of question has come up on past papers, asking why nano-particles would be better than normal particles.
I've always put surface area compared to volume as my answer.
In all the past papers I gained a mark for it. I reckon you will in this exam, as you've recognized one of the properties of nano-particles.

A/B.

I reckon A* boundary will be extremely high. This was very similar to a past paper that i have done.

And the grade boundaries on that for an A* was 38.

ermm..did you get a mark for syaing bigger surface area?

If you do the working out upside down then the rest of your working will be incorrect as it relies on how you set it out. marks are only awarded if you do not simplify or get the right awnser so you will get the mark for Mass/MR. Mr/Mass is not awarded marks as it is the incorrect way to work it out.

http://store.aqa.org.uk/qual/gcse/qp-ms/AQA-CHY2H-W-MS-JUN08.PDF

q5a, read the extra information - if you do an upside down ratio, followed by the correct solution to the proportions you used, you can get ecf marks. It also says lose only 1 mark if you do the upside down ratio.

For the filtration answer I put evaporation??? And A or B which ones more likely with 33b

Can I just say, I love you! (no homo).

I have done many past papers, sometimes its allowed evaporation on mark scheme and other times it has said 'ignore evaporation'.

Just pray mate.


And about which grades more likely? The A grade could vary, bet I reckon your in with a chance of an A with 33, considering:

- There was a empirical formula question(4 marks)
- AQA managed to successfully sneak in the atom and ion shell structure diagram (2marks)

Does anyone think that they will omit the 2 mark electronic structure diagram, as a lot of people are claiming to have missed it out?

lol, i just dont want people to feel like theyve done worse than they have, i know how i feel when i think ive crashed out on a question worth a lot of marks

But u were being honest when u said I'll get 3 right? Some people here revel in making others feel ****. Js.

Can you put there will be surplus of electricity, as there are more electrons. And this is dangerous????? For the last question and part.

I agree because loads of people got that wrong... I think people are estimating to high. My prediction is 36 a* or possibly lower. Last time empirical came up boundary was really low (30 for a* or something)

Having said that. I must add my whole class got the empirical formula question right.

But that's only because when we learnt the empirical formula in class the teacher used the FE203 as an example to teach us out of the revision guide.
So a lot of people recalled that, and got four marks for that question. ( as you get full marks for the answer alone.

What were the chances of that eh?