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Edexcel IAL chemistry unit 4 - 13 jun 2017

couldn't find a thread so I made one

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Reply 1
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how is the answer is B?
Original post by f999
20170523_133923.jpg

how is the answer is B?


If u square all the conc terms in the expression for Kc' u get Kc. Thus Kc=(Kc')^2
Reply 3
Original post by shady zax
If u square all the conc terms in the expression for Kc' u get Kc. Thus Kc=(Kc':wink:^2


How would you do that? 1/2^2?
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Original post by f999
How would you do that? 1/2^2?
Reply 5
Original post by shady zax
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oh thank you!
Original post by f999
oh thank you!


😌


:3
Asking a question from unit 5:
ImageUploadedByStudent Room1495861614.010319.jpg
How would u circle the amine group? I mean do u include the carbons or only the nitrogen?


:3
Reply 8
Original post by shady zax
Asking a question from unit 5:
ImageUploadedByStudent Room1495861614.010319.jpg
How would u circle the amine group? I mean do u include the carbons or only the nitrogen?


:3


would both of them be included as it is the functional group
Original post by zooshan
would both of them be included as it is the functional group


Im sorry?


:3
Original post by shady zax
Im sorry?


:3


doesnt the amide group contain both carbon and nitrogen in its functional group
Original post by zooshan
doesnt the amide group contain both carbon and nitrogen in its functional group


Not amIDE dummy.. amINE


:3
Original post by shady zax
Not amIDE dummy.. amINE


:3


omg.. haha.. i saw it as amide....
Original post by zooshan
omg.. haha.. i saw it as amide....


:3


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Original post by shady zax
:3


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sorry.. i always get confused between them both.....
i thnk u have to include the carbon with other groups... but it doesnt say to circle in this question?
Like u would include the H in a primary amine huh? Ik just wanting to kno in case were asked to do that..


:3
Original post by shady zax
Like u would include the H in a primary amine huh? Ik just wanting to kno in case were asked to do that..


:3


yup....
hmm.. they do ask...
Reply 17
Im a little confused.. Do we assume the concentration here as 2? because it is doubled?
Original post by xxdrwxx
Im a little confused.. Do we assume the concentration here as 2? because it is doubled?


Put in any number u wish for ur base rate. Then double those numbers and find new rate. Divide new rate by base rate.
(edited 6 years ago)
Reply 19
ohh ok thank youu
Original post by shady zax
Put in any number u wish for ur base rate. Then double those numbers and find new rate. Divide new rate by base rate.

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