Official AQA GCSE Chemistry Unit 2 24th Janurary NEW SPEC Watch

Poll: What do you think the 6 marker will be?
Electrolysis of (metal) (14)
22.95%
Gas chromotography and Mass spectrometry (19)
31.15%
Atomic structure and bonding (5)
8.2%
Polymers (10)
16.39%
Explaining the process of a experiment (8)
13.11%
Other (please leave your suggestion) (5)
8.2%
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JorgeCarter123
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#421
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#421
What did everyone get for the energy change question on the reversible reaction section?

Was it 300J are released in the Exothermic reaction as well because it has to be equally Exothermic as it is endothermic?
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DanTheMan358
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#422
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#422
(Original post by BLTontour)
EVERYONE I know got H+ + 0H- = H20. That is the neutralisation in the syllabus and revision guides.

Yeh I know, I checked when I got home aha, not to bothered about it...
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DanTheMan358
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#423
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#423
(Original post by JorgeCarter123)
What did everyone get for the energy change question on the reversible reaction section?

Was it 300J are released in the Exothermic reaction as well because it has to be equally Exothermic as it is endothermic?
Yep that's what I got
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sykik
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#424
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#424
why you heat for stage 1, could you write thermal decompistion
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salem96
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#425
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#425
(Original post by sykik)
why you heat for stage 1, could you write thermal decompistion

it was because it was an exothermic reaction i put
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sykik
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#426
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#426
(Original post by BLTontour)
I put both...:/


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I thought the process is called crystillisation but the answer should be evaporation
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sykik
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#427
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#427
(Original post by salem96)
it was because it was an exothermic reaction i put
so is thermal decomposition right
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salem96
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#428
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#428
(Original post by sykik)
so is thermal decomposition right
well no because thermal decomposition is a form of ENDOthermic reaction
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sykik
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#429
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#429
(Original post by salem96)
well no because thermal decomposition is a form of ENDOthermic reaction
oh well 1 mark have u revised for physics
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salem96
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#430
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#430
(Original post by sykik)
oh well 1 mark have u revised for physics
yeh, should be ok but it will be the calculation questions that are going to save me haha
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sykik
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#431
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#431
(Original post by salem96)
yeh, should be ok but it will be the calculation questions that are going to save me haha
Yh same here all i can do is maths and the science bits just confuse me
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tammy:)
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#432
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#432
hmmm...2/3 of unit 2 aqa syllabus over and done with:'D.....now the results=^_^=
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Annaphora
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#433
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#433
I hate AQA.
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Farhan96
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#434
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#434
(Original post by Artsy)
It was a one marker, I put filtration in one then evaporation in other o.o
Yup thats right
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Farhan96
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#435
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#435
(Original post by DanTheMan358)
Tbh as far as I can think of the a few 1 markers. The first question with the mean and the anomalous data (if that proves to be correct), the question asking the number of electrons in iodines outer shell, me be silly tried to count them instead of realising halogen is a halogen. And the asking for the ionic equation... had no idea what an ionic equation was so I put
(Na+OH-)+(H+Cl-) ---> (Na+Cl-) + (H+OH-), I then wrote the worded equation below.

I think the answer was just H+ + OH- --> H2O
Ahhhh right that shouldnt be tooooooo bad. I think I lost one mark for saying you heat the copper oxide with the acid to help it dissolve quicker and maybe one mark on the 6 marker because examiners probably wont give too many full marks. And I probably lost one mark somewhere else just as a normal candidate would.

Dont be worried, you probably will still come out with an a*
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grammar12
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#436
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#436
(Original post by DanTheMan358)
Yeh I know, I checked when I got home aha, not to bothered about it...
Its only one mark but the reverse reaction symbol was important because of the reaction type (dont know what that means but hey!) my teacher can be confuddling at times!
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Rohan97
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#437
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#437
(Original post by salem96)
well no because thermal decomposition is a form of ENDOthermic reaction
Yes the reaction was an ENDOthermic reaction because the question asked to suggest why the reaction was heated...
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missexams
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#438
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#438
is any1 gona put up the unofficial mark scheme?
i really need it asap
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BLTontour
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#439
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#439
(Original post by sykik)
I thought the process is called crystillisation but the answer should be evaporation
It is evaporated to aid crystallisation.


This was posted from The Student Room's iPhone/iPad App
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ghost_rebel
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#440
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#440
That question about why hydrogen goes to the negative electrode!?if I said that hydrogen was a positively charged ion,would that be a mark?
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