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IAL Chemistry Unit 1 edexcel 2017 October Mark Scheme

How was the paper guys? It was pretty easy for me.

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What the hell is a dimer?? i think theres alot of stuff not in unit 1
(edited 6 years ago)
Reply 2
Original post by jazlilong
What the hell is a dimer?? i think theres alot of stuff not in unit 1


I didn't what that was too so I left that blank. Did you know the question about octane
is it the isoctane? i think its cause its more efficient at burning or something...
theres a question about redox reaction and they ask whats the reaction.. isnt it unit 2 stuff?
it was displacement reaction i guess
it was precipitation i guess, because solid product was formed.
It was difficult for me
Original post by Luj99
How was the paper guys? It was pretty easy for me.


It was difficult for me
Were the abundances 66.75 and 22.25
Original post by hami_2000
Were the abundances 66.75 and 22.25


No it was some 77.something
Original post by Dawood khalid
No it was some 77.something

Yeah sorry i meant 77
Original post by hami_2000
Yeah sorry i meant 77


Can you remember any other questions you know the answers to. I wanna know how i did
Original post by hami_2000
Can you remember any other questions you know the answers to. I wanna know how i did


What about the last one tha lattice energy
I did the lattice energy minus everything else to find the electron affinity
Reply 14
i did the lattice energy the same way but didn't you have to divide by 2 to get the electron affinity for one electron?
Reply 15
Original post by hami_2000
Yeah sorry i meant 77


how come 77 something for the 35CL i got 101. something and for the next one it was i dont know but can you show how you calculated? also for question one how did you show the volume was 12cm3..it was the worst paper
Reply 16
a dimer is two polymer unit but i got that wrong cz i made a cyclic alkane
Original post by jazlilong
What the hell is a dimer?? i think theres alot of stuff not in unit 1
Reply 17
also how to calculate delta T ?? wth that wasnt in the course. it was difficulttt
Reply 18
also i hope the threshold is low for this one...mine was way too bad...any idea about the threshold?
What did you guys write for how do you know when enough water has been evaporated for the crystallization thing

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