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lgs98jonee
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HI
I was wondering whether anybody who has done unit 2 for Chemistry with Edexcel, knows whether or not you need to know the 'mechanism' of a reacrion (i.e. how UV light breaks up CL2 to form free radicals, and then this induces more free radicals to be produced) or do we just need to know that chlorine and so and so react to form certain products without having to know exectly what goes on.
I would be very grateful for any help :_)
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The Best
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(Original post by lgs98jonee)
HI
I was wondering whether anybody who has done unit 2 for Chemistry with Edexcel, knows whether or not you need to know the 'mechanism' of a reacrion (i.e. how UV light breaks up CL2 to form free radicals, and then this induces more free radicals to be produced) or do we just need to know that chlorine and so and so react to form certain products without having to know exectly what goes on.
I would be very grateful for any help :_)
You do NOT need to know the mechanisms, as far as i know. You can just learn it all without knowing why it happens!
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lgs98jonee
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thnx...have u done the unit then?
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Ralfskini
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The mechanism is not required for unit 2 but will be covered in Unit 5.



You need only be able to classify the reaction as homolytic free radical substitution, understand the conditions necessary to initiate the reaction, the products formed, i.e. a halogenoalkane and hydrogen halide.
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lgs98jonee
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so u dont need to know about propagation steps and initiation steps?
thnx for all ur help so far
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hornblower
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(Original post by lgs98jonee)
HI
I was wondering whether anybody who has done unit 2 for Chemistry with Edexcel, knows whether or not you need to know the 'mechanism' of a reacrion (i.e. how UV light breaks up CL2 to form free radicals, and then this induces more free radicals to be produced) or do we just need to know that chlorine and so and so react to form certain products without having to know exectly what goes on.
I would be very grateful for any help :_)
Mechanisms are in Unit 5.

J.
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matouwah
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(Original post by lgs98jonee)
so u dont need to know about propagation steps and initiation steps?
thnx for all ur help so far
no u dont....u just need to know the final product...and the conditions and reagents...
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