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AQA CHEM2 ~ May 23rd 2012 ~ AS Chemistry

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Original post by rturnbull94
Good luck for it though :smile:


Thanks :biggrin:
Reply 21
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Doctor.
12
This is a tad bit early haha
Original post by Doctor.
This is a tad bit early haha


No it isn't:colone: We can post revision tidbits...
Reply 23
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Sorro10
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Lol :d
Reply 24
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Sorro10
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Just started 1st topic today D:
Original post by Sorro10
Just started 1st topic today D:


What have you started? We've started on Endo and Exothermic reactions and we're talking about doing our ISA :smile:
http://www.chemtube3d.com/Main%20Page.html
Reply 27
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Sorro10
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Original post by rturnbull94
What have you started? We've started on Endo and Exothermic reactions and we're talking about doing our ISA :smile:


Yea we started that, and we started topic 8 too because we have 2 chem teachers different lessons they do different halves each
Reply 28
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BoltonTOM
We started on Endothermic and Exothermic reactions too.
Reply 29
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BoltonTOM
Im probably gonna have to give CHEM1 and CHEM2 during the Summer exams lol.
Reply 30
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Sorro10
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Original post by BoltonTOM
Im probably gonna have to give CHEM1 and CHEM2 during the Summer exams lol.


How did you find CHEM 1?
Reply 31
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BoltonTOM
Original post by Sorro10
How did you find CHEM 1?


Some questions were hard lost 10 marks atleast
Reply 32
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Sorro10
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Original post by BoltonTOM
Some questions were hard lost 10 marks atleast


;/
Original post by Sorro10
Yea we started that, and we started topic 8 too because we have 2 chem teachers different lessons they do different halves each


Yeah, so do we :smile: I think with our other teacher we'll start with either alkaline earth metals or he halogens. I can't really remember what she started with last year :s-smilie:
Reply 34
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Sorro10
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Original post by rturnbull94
Yeah, so do we :smile: I think with our other teacher we'll start with either alkaline earth metals or he halogens. I can't really remember what she started with last year :s-smilie:


Yea I think the topic was Haloalkanes or something
Reply 35
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BoltonTOM
Can someone go through the stage after Initiation? In topic Haloalkanes?
Reply 36
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BoltonTOM
:c
Original post by BoltonTOM
Can someone go through the stage after Initiation? In topic Haloalkanes?


Original post by BoltonTOM
:c


Propagation steps.

Cl. + CH4 gives .CH3 + HCL

.CH3 + Cl2 gives CH3Cl + Cl.

Termination step is when two free radicals combine, for example:

.CH3 + .CH3 gives C2H6

Hope that helps, free radical substitution is really annoying at first and takes a lot of practice until you feel you really understand it. Once you learn the reaction of chlorine with methane you should be able to apply your knowledge to any exam question.
Reply 38
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Sorro10
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Original post by BoltonTOM
Can someone go through the stage after Initiation? In topic Haloalkanes?


EDIT: NVM someone already posted.
Reply 39
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BoltonTOM
Started Alkenes now ;P

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