Hedwigeeeee
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#1
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how do u think of it,edx ial chem 4
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sandani1234
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#2
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It was not easy....
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Hedwigeeeee
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#3
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(Original post by sandani1234)
It was not easy....
really,I think it is ok,so many questions are similar to jan 2020...
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sandani1234
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Yup
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Hedwigeeeee
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#5
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(Original post by sandani1234)
Yup
what did you get for the question about deducing structure? is that ester due to the sweet smelling of pear.? and the other two are carboxylic acid and alcohol?
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Anthony1912
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#6
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somebody please tell me what to do im not ready at ALL for unit 5 ive only done 1 paper
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Hedwigeeeee
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#7
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(Original post by Anthony1912)
somebody please tell me what to do im not ready at ALL for unit 5 ive only done 1 paper
but the exam is on Thursday...so why you booked the exam when u did not prepare well?
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halbsp
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(Original post by Anthony1912)
somebody please tell me what to do im not ready at ALL for unit 5 ive only done 1 paper
did u do u5 today?? how did it go
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Sara aliyeva
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(Original post by halbsp)
did u do u5 today?? how did it go
It went really horrible
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halbsp
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(Original post by Sara aliyeva)
It went really horrible
the last question about the lanthanide metals..... i just didnt know where to start it was so hard and i ran out of time as well :/
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Hedwigeeeee
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(Original post by halbsp)
the last question about the lanthanide metals..... i just didnt know where to start it was so hard and i ran out of time as well :/
is that just similar to transition metal? i did not work out the three step mechanism for that amine.others are fine but i think this paper is hard....
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Hedwigeeeee
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what did u get for the percentage of methane?
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arjun2101
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(Original post by Hedwigeeeee)
what did u get for the percentage of methane?
I think I got around 47%, I did not know how to link volume to moles becoz there was no conc.
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arjun2101
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(Original post by Hedwigeeeee)
is that just similar to transition metal? i did not work out the three step mechanism for that amine.others are fine but i think this paper is hard....
The amine mechanism involved conversion of alcohol to ketone, ketone to cyanohydrin and then cyanohydrin to amine total 3 steps. The last step using LiALH4 would reduce the cyanide to form NH2, I hope that's what they wanted
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Sara aliyeva
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What do you think the grade boundary is gonna be?
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Sara aliyeva
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Like do you expect it to be over 65 or below?
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Hedwigeeeee
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(Original post by arjun2101)
I think I got around 47%, I did not know how to link volume to moles becoz there was no conc.
I got 20....lol and i have never seen that mechanism
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Hedwigeeeee
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(Original post by Sara aliyeva)
Like do you expect it to be over 65 or below?
i hope it will be lower. because this is the first new syllabus exam and also during the pandemic.
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Hedwigeeeee
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#19
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(Original post by arjun2101)
The amine mechanism involved conversion of alcohol to ketone, ketone to cyanohydrin and then cyanohydrin to amine total 3 steps. The last step using LiALH4 would reduce the cyanide to form NH2, I hope that's what they wanted
why it is alcohol. it seems they convert a h to ch2nh2. i am confused
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halbsp
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(Original post by Hedwigeeeee)
why it is alcohol. it seems they convert a h to ch2nh2. i am confused
yes i thoought so as well...
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