2016 AQA GCSE Chemistry Unofficial mark scheme 2016

[QUOTE="toms4242;64954109"]

Carbon monoxide would be incorrect as it is a gas, and therefore not visible on the bottom of the beaker. However if you have referred to incomplete/partial combustion in your explanation then you will probably get a mark.

Oh

Thank you

Reply 261

MollieT3

4

Original post by srmed

Was the two conditions for cracking: high temperature and hot catalyst

Posted from TSR Mobile

Would I get the marks for 60 degrees and nickel catalyst?

-doesn't matter that's hydrogenation

(edited 7 years ago)

Reply 262

eve.r

3

Original post by Rawfearplasma

For Q2 was the answer not just copper?

No, it was testing knowledge on the lime cycle but using a different metal. When calcium carbonate is thermally decomposed it forms calcium oxide and carbon dioxide so it's the same but with copper instead of calcium

Reply 263

kysurunloved

In the first question it was: name the sub-atomic particles in 'X' (which only referred to the nucleus of the atom).
Therefore it would be proton (+1) and neutron (0).

Reply 264

lilianna_m8

10

Man. To be honest I underestimated both Biology and Chemistry unit 1 papers.
Luckily (I think ..) based on the unofficial mark scheme I got around 39-42 in biology, so let's just say I got an average of 40 marks.
However with chemistry?! I got around 32-36 marks, I did terribly bad, that's an average of 34 marks .. I'm predicted A for both sciences, and both my coursework are A*s. I wanna get As for both but I'd love an A*, I'm trying my hardest to get at least high As/ low A*s in both units 2&3.

Good luck everyone!

Reply 265

eve.r

3

Original post by MollieT3

Would I get the marks for 60 degrees and nickel catalyst?

That's for hydrogenation of oils not cracking

Reply 266

Ahahah191

What is an A* likely to be

Reply 267

Tevya19

Heyyy... Does anyone know what grade boundaries would be ?
And is it still possible to get an a* if I got a B for the Chem coursework ??

Reply 268

Salmang123

Well this was better that b1

Reply 269

esmeeclaire

Do they deduct marks for incorrect or irrelevant information? For example the last question I talked about the nickel catalyst at 60 degrees with hydrogen, but I also went off on a tangent about partially hydrogenated oils being unhealthy? In instances like these, would I get minus marks?

Reply 270

jazz_xox_

13

Original post by Ahahah191

What is an A* likely to be

last year it was 50, and i thought this paper was easier. however i do think it would be cruel for any higher than this, so i predict 50

Reply 271

BSDr34

for the 5 marker i did the explain bit only because i didnt read the question properly, could you have said partial hydrogenation and stuff and get marks? this mark sheme doesn't give alternatives. I didn't say how hydrogenation works but i mentioned loads of benefits, how many marks would i get?

(edited 7 years ago)

Reply 272

Moni1234567

5

Original post by Ahahah191

What is an A* likely to be

Ngl I reckon it will be a 50/52+ for an a* maybe a 42+ for an a

Reply 273

lilianna_m8

10

Original post by Tevya19

Heyyy... Does anyone know what grade boundaries would be ?
And is it still possible to get an a* if I got a B for the Chem coursework ??

Hey,
I'm not an expert but I think you could get an A* if you get A*s for all your units, but really high though.
Good luck!

Reply 274

YAY GCSE

2

Original post by esmeeclaire

Do they deduct marks for incorrect or irrelevant information? For example the last question I talked about the nickel catalyst at 60 degrees with hydrogen, but I also went off on a tangent about partially hydrogenated oils being unhealthy? In instances like these, would I get minus marks?

You wouldnt get minus marks but it's asking for benefits of the hydrogenated oil and if you said it was unhealthy that is a disadvantage. If you stated the right conditions and reaction with hydrogen you will probably get 2 or 3 marks

Reply 275

dee08

7

Original post by abigail_lions

I can't remember being asked to draw the electronic structure on the first question help!!!

I accidentally skipped it out :frown:

. I think it was only one mark though

Reply 276

t10r

13

For the question about making the experiment more accurate, would having the spirit burner in a container inside the conical flask so that the water was surrounding the spirit burner, reducing the amount of heat is lost to the surrounding award any marks at all?