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AQA GCSE Chemistry - C2 and C3 15th May

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Reply 820

XenonSabre

For the 'why wasn't the actual yield gained' question on C2, do you think i'll get 'it was only the theoretical yield'?

Reply 821

James9072

Original post by harmingjuli

Nobody remembers?

3 marks I think

Reply 822

FS97

Original post by HeskeyLAD

Would 42 secure me an A? That's at worst considering the answers you guys are getting (C2).

42 would likely be an A. I've done numerous mocks at school and an A* was only like 46. So I'd guess an A could go to as low as like 39/40.

Reply 823

1998

Original post by Finlay Coles

How is the modern periodic table arranged in terms of protons?

I wrote 'in periods'. Is this right?

I think you need to say that the number of protons increase

Reply 824

ImBallin

Original post by Cheekymonkey178

I
put because they have larger surface area to volume ration so there is more area exposed to the particles therefore it makes it faster where as the other one has bigger volume to surface area

Yea same.

Reply 825

damolaabiola

Original post by XenonSabre

For the 'why wasn't the actual yield gained' question on C2, do you think i'll get 'it was only the theoretical yield'?

This is because it was a reversible reaction. All products react to form the original reactants. That is what I wrote xx

Reply 826

FS97

What did everyone put for the question on water filters (not sure if it was C2 or C3). It was like what substance in water filters removes scale?

I put sodium/hydrogen ions as an educated guess...

Reply 827

Cheekymonkey178

Original post by Kitty201322

which statement did you guys tick from the three boxes? was it the middle one?

Thinkk i did like how much caffiene is there in a drink?

Reply 828

HeskeyLAD

Original post by FS97

...an A* was only like 46.

Only? Please stop demoralising me! xD

Reply 829

mani119

Lol it was in jan 2014 one :smile:

that A* was 50/60
Anyways I flopped the half equations, the balancing the equation, the glass one and the 'how scientists can prove' this or watever
So angry now, cant believed I lost silly marks on these easy questions.
If I get everything else right ( low chance lol) then Ill most likely get a*
Also for the 'why wasn't the actual yield gained' I wrote incomplete reaction would i get the mark?
Also for the zinc sulfate (I think) the one with what is produced at the negative electrode I wrote zinc because it was molten and not in a solution so they is no H+ to be formed can anyone tell me if this is right please?

(edited 9 years ago)

Reply 830

damolaabiola

Original post by gcser

Was the first question on c3 about distillation? I wrote about filtering out solids like twigs and grit and then adding chlorine...was that completely wrong?

I think that is right because water does not get distilled as it is too expensive. Distilled water is only mainly used in labs xx

Reply 831

MATHSPOW!!

Original post by ImBallin

Yea same.

Ok so I bascually wrote
One of them has a larger surface area and so the frequency of collisions between particles will increase... Will this get me 2 marks do u think I kinda guessed lol

Reply 832

gcser

Original post by thedaniel98

distillation is the one when u heat that only works on soft water, adding chlorine should get u a mark or two out of 4

Ok thanks. But isn't distillation done to soften water, not purify it? I thought the question was asking about purification of water from reservoirs

Reply 833

vish.handa

Original post by happy hippo

the second test was to prove that sulfate ions were present

no it was to test for hallides and yellow precipitate was formed which would make it iodide not bromide

Reply 834

Cheekymonkey178

Original post by damolaabiola

This is because it was a reversible reaction. All products react to form the original reactants. That is what I wrote xx

it can also be that the substance may be loast in handling and maybe left in the aparatus

Reply 835

gcser

Original post by damolaabiola

I think that is right because water does not get distilled as it is too expensive. Distilled water is only mainly used in labs xx

Ok thank you! Hopefully it's right xx

Reply 836

FS97

Original post by HeskeyLAD

Only? Please stop demoralising me! xD

Haha sorry, that was not intentional :wink:

Reply 837

gcser

Original post by MATHSPOW!!

Do you think 56 will be enough for 100ums biology was a disaster so I as need almost full marks...

56 will most likely smash 100 UMS!

Reply 838

MATHSPOW!!

Original post by Cheekymonkey178

Thinkk i did like how much caffiene is there in a drink?

Yeh the question was which statement could be tested by science and so only an investigation would enable you to find out how much caffeine is in a drink whereas the other statements were should caffeine be in drinks and how much caffeine should people consume which would be more down to personal choice I guess... You can't just tell someone what is right and wrong

Reply 839

MATHSPOW!!

Original post by gcser

56 will most likely smash 100 UMS!

Ah cause I basically made a list of all the marks I think I got and it's coming to like 56 I'm really good at predicting my marks was spot on last year haha... But aren't the boundaries gone be crazy high.. Ahhh I'm scared