Edexcel Nuffield AS level Chemistry Watch

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Goldilocks
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#1
Report Thread starter 13 years ago
#1
hey
anybody out there doing edexcel nuffield? Im doing past papers at the moment and am finding it really, really difficult, does any body have any links or tips or anything to help with revision? I especially have trouble with working out what products are formed with which reactions and what tests need to be used, there are just too many! Please help! Thanks very much!
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spoon1
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#2
Report 13 years ago
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Hi, im doing nuffield, what do you need help with?

There's a website mainly for the nuffield specification:

www.chemistry-react.org

which you might find useful.
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Goldilocks
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#3
Report Thread starter 13 years ago
#3
hey!
Thanx, Ive just been on that site, its quite useful but i just need some help on exam questions in general, everything is fine working through the book, then I just find it quite difficult visualizing reactions and products for the substances or circumstances in the question : S but i guess thats just just something you have to learn!
Do you anything about oxidising agents?
I have a question which says " Iodine reacts with Sodium thiosulphate as shown below
I2 (aq) + 2S2O3 (2-) ---> 2I (-)(aq)+S4O6(2-)(aq)

Which is element Chlorine or Iodine is the more
powerful oxidising agent? Justify your answer with
reference to the equation above."
(which is 4Cl2 (aq) + S2O3 (2-) (aq) + 5H2O(l) --> 8Cl (-) (aq) + 2SO4 (2-) (aq) + 10H (+) (aq) ) would it be the Iodine as it oxidises four times as much as the top equation?
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