Chemistry C1,C2,C3 - May 2014

Hey guys, if you're sitting any of these exams, feel free to share any hints or revision tips on here, or just any cool chemistry related stuff! :biggrin:

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(edited 9 years ago)

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Reply 1

TheNaughtyOne

Yes man, c3 yeahh

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Reply 2

suzywithaZY

CHEMISTRY IS AWESOME.
.. that's all

Reply 3

TheNaughtyOne

Some1 ask questions please

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Reply 4

BobThomas3

Original post by TheNaughtyOne

Some1 ask questions please

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Hi, how do you answer the how science works questions for Chemistry (well all the sciences)???

Reply 5

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Original post by BobThomas3

Hi, how do you answer the how science works questions for Chemistry (well all the sciences)???

Well, you just have to learn the scientific process and literally 'How Science Works'! :tongue:

The normal scientific method is:

1. Ask a question
2. Make a hypothesis
3. Perform experiment
4. Collect data
5. Draw conclusions

You also have to learn about fair tests and different types of variables, as well as being able to describe a graph properly (which is normally more complicated than it seems :tongue:

)

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Reply 6

BobThomas3

Original post by majmuh24

Well, you just have to learn the scientific process and literally 'How Science Works'! :tongue:

)

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Thanks, more specifically the questions asking 'how can you improve the results of this experiment?' (OWTTE)

Reply 7

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Original post by BobThomas3

Thanks, more specifically the questions asking 'how can you improve the results of this experiment?' (OWTTE)

Is it a fair test?
Is there only one variable being changed?
How could uncertainty be introduced into the experiment?
Is there potential for random or experimental error?
Are the conclusions valid?
Is it reliable and reproducible?

You just have to go through all of these things and see if there's one that it doesn't fit in with.

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Reply 8

BobThomas3

Original post by majmuh24

Thank you so much, those questions are always the ones that knock me down marks :frown:

Reply 9

Sal11

Best revision tip: turn up to the exam

Reply 10

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Original post by Sal11

Best revision tip: turn up to the exam

Wow. Thanks a lot for your amazing help.

Reply 11

Studygeek16

Hey which exam board is this for?
Is it for OCR 21st Century science?

Reply 12

Winading001

Original post by Studygeek16

Hey which exam board is this for?
Is it for OCR 21st Century science?

AQA.

Reply 13

Studygeek16

Original post by Winading001

AQA.

Oh okay thanks!
No one seems to be doing OCR, its so annoying!!!

Reply 14

tridianprime

How can I prepare for 2 days time? recommendations? I am not very confident with chemistry but I think if I revise now I can do well.

Reply 15

TheKian

Original post by tridianprime

How can I prepare for 2 days time? recommendations? I am not very confident with chemistry but I think if I revise now I can do well.

Go over bits you're unsure on at http://www.my-gcsescience.com/videos/making-soluble-salts/

Reply 16

HolmanBrown98

Quite worried for C3 actually!

Reply 17

charlottejyp

Can someone talk to me about gas chromatography and the mass spectrometer thing (GC-MS) please? :tongue:

And this molecular ion peak thing :s-smilie:

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(edited 9 years ago)

Reply 18

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Original post by charlottejyp

Can someone talk to me about gas chromatography and the mass spectrometer thing (GC-MS) please? :tongue:

And this molecular ion peak thing :s-smilie:

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Bombarded with electrons to ionize, vaporized and accelerated through tube at different speeds depending on mass (

F = \dfrac{d \rho}{d t}

), deflected by magnetic field depending on speeds and charges, mass spectrometer detects these and uses them to find out the mass of the elements and the relative composition.

Molecular ion peak corresponds to RMM of molecule with one electron removed.

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Reply 19

suzywithaZY

Determined to not **** up this exam after Biology's failure xD So yeah, hopefully it will go well. If anybody has some challenging C2 and C3 questions, please fire them at me now, thanks :biggrin: