2016 AQA Chemistry C2 - Unofficial Mark Scheme 2016

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For the work out the average question I was really stupid and forgot to not include the anomaly even though it said not to. Would I get at least one mark for working out the average of the numbers I used or is that 2 marks gone for me?

Reply 242

survivors2000

Original post by ruadb0y

I said that nanoparticles (of an element) were much smaller compared to an atom (of the same element) as these nanoparticles are measured in nanometres.

I wonder how many marks this would get...

yah i think u would get full marks was it only 2 marks or 1 mark not really sure tbh

Reply 243

survivors2000

Original post by dee08

i did the same thing :frown:

i think we would get one mark

Reply 244

guy321

Can someone help me please?!?!?
The question that asked to draw the energy level diagram was 4 marks.

I drew the diagram but used straight lines. Would I get the marks?

I drew a line upwards from the reactants then I drew a horizontal line then a line downwards and then a horizontal line (below the reactants) to show the products. I labelled the activation energy as an arrow from the level of the reactants to the highest horizontal line and the overall energy change was an arrow from the level of the reactants to the level of the products which is below the reactants. Because I used a ruler to draw straight lines I'm worried I may lose marks????

Plz help...

Here is a picture of what I drew:

btw the line from reactants to top line is shorter than the line from the top to products because it was an exothermic reaction in the exam. In the image attached it shows the opposite (an endothermic reaction).

(edited 7 years ago)

Reply 245

Lolol786

Original post by dee08

For how to make the reaction more accurate I said add a lid so less energy is lost to the surrounding instead of use a digital thermometer, is that wrong.

Someone pls reply! I'm so worried

Yes that's what I wrote to
Because I Remeber it came up on one of the past papers

Reply 246

CCGI

Original post by dee08

For how to make the reaction more accurate I said add a lid so less energy is lost to the surrounding instead of use a digital thermometer, is that wrong.

Someone pls reply! I'm so worried

In a previous paper there were two answers that was asking the same question, one was add a lid and the other was digital themometer so yes

Reply 247

George j

Original post by jackbarry1999

1b) use a digital thermometer ~ more accurate ~ no human error

If I wrote use an electronic temperature sensor which is more accurate would that count

Reply 248

CCGI

Original post by Redcoats

I put that it was far smaller than an atom and then wrote 1 nm = 10^-9 m

If a nanoparticle is made up of a few hundred atoms theres no way 1 nanoparticle can be smaller than an atom

Reply 249

Sumayyah K

For 1d I said to use a lid for the beaker to prevent heat loss...idk if that's right

Reply 250

Moustafa123r

What did u put for why pure water doesn't conduct electricity is because ions are not free to move

Reply 251

Moustafa123r

Which question was this

Reply 252

Benb2000

Original post by guy321

What question are you on about here?

Reply 253

Moustafa123r

Is this in C2 there is no any question asking u to draw this

Original post by guy321

Can someone help me please?!?!?
The question that asked to draw the energy level diagram was 4 marks.

I drew the diagram but used straight lines. Would I get the marks?
Is this in C2 paper i didnt see any question aski g u to draw
I drew a line upwards from the reactants then I drew a horizontal line then a line downwards and then a horizontal line (below the reactants) to show the products. I labelled the activation energy as an arrow from the level of the reactants to the highest horizontal line and the overall energy change was an arrow from the level of the reactants to the level of the products which is below the reactants. Because I used a ruler to draw straight lines I'm worried I may lose marks????

Plz help...

Here is a picture of what I drew:

Reply 254

BGRO

Original post by Hiorns158

I just looked at the graphs A, B, C on the left and saw that 200kg was the best, so I said why- highest profit, highest crop yield...
Not sure what you've done, but you might still get a couple of marks?

I thought it was a based on opinion question? You just had to justify your answer...

Reply 255

Benb2000

Original post by Moustafa123r

Which question was this

no delocalised electrons in the water question

Reply 256

MMM12

Original post by louisaah

6c is thermosetting plastics are best for saucepan handles (?) because they have crosslinks which cannot be broken by heat, whereas in a thermosoftening plastic, the chains of polymers are joined by weak intermolecular forces and are easily broken by heat

Strong?

Reply 257

alchima

Original post by Lolol786

Yes that's what I wrote to
Because I Remeber it came up on one of the past papers

That's what I wrote too because even if heat is lost, a digital thermometer which can detect small changes in temp will still not show the true value.