Edexcel IAL unit 2 Chemistry 3/6/2014

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Reply 40

Vivekmaj

Original post by samakawg

Well there are no lone pairs and it gives maximum seperation xD

So would I get any mark for my reasoning

Reply 41

rockstar101

Original post by Vivekmaj

So would I get any mark for my reasoning

U should

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Reply 42

Ripper Phoenix

Original post by Vivekmaj

What was the reason for the Alkene to have a bond angle of 120 degrees and a shape of trig planar is it because the double bond is counted as a single bond as there is free restriction about the double bond

3 bond pairs no lone pairs, bond pair of electrons take up position of max separation/min repulsion :biggrin:

Reply 43

Vivekmaj

Original post by Paras Agarwal

3 bond pairs no lone pairs, bond pair of electrons take up position of max separation/min repulsion :biggrin:

But I'm still right sio?

Reply 44

Ripper Phoenix

Original post by Vivekmaj

But I'm still right sio?

can't say i'm not the mark scheme mate.. but if the answer is there then you've nailed it

Reply 45

awesomesoccerfan

were there any questions below the bromate(V) dot,cross diagram? I think i might've missed a question or two :s-smilie:

Reply 46

Fattyma97

Wow i remember getting those answers.. let's discuss more!!

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Reply 47

awesomesoccerfan

Original post by Fattyma97

Wow i remember getting those answers.. let's discuss more!!

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keep posting yours, and help us out :tongue:

Reply 48

Fattyma97

Haha okay, for the mcq question about the structure isomers of halogeno alkanes, what did u put. I chose D for both parts of the question

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Reply 49

Ripper Phoenix

Original post by Fattyma97

Haha okay, for the mcq question about the structure isomers of halogeno alkanes, what did u put. I chose D for both parts of the question

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no part a was D
part b was B

Reply 50

Ahmed Soliman

Original post by Paras Agarwal

no part a was D
part b was B

the answer D in part a was 2 chloro pentane which is the same for both isomers a and c
however b was 2 methyl 2 chloro butane the one which is a square if u remember it had a CH3 group as well as chlorine on the carbon atom so the answer is B

this is how I thought

Reply 51

Fattyma97

Original post by Paras Agarwal

no part a was D
part b was B

Why? what was the shape of B again?

Reply 52

rockstar101

B was the square with top right having an extra line for CH3 and a line for Cl

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Reply 53

abdane

Yea the first part was D and the second part was B, first part D because it was the only one different (not cyclo) and B in the second one because it was tertiary, rest were all secondary...

Reply 54

Ahmed Soliman

Original post by abdane

Yea the first part was D and the second part was B, first part D because it was the only one different (not cyclo) and B in the second one because it was tertiary, rest were all secondary...

but B was the only one which had 2 lines on the carbon atom on the top right
one line for Cl
the other for CH3

(edited 9 years ago)

Reply 55

7neallite

I'll upload a model mark scheme for unit-1 & 2 IAL by tomorrow.

Reply 56

rockstar101

Original post by 7neallite

I'll upload a model mark scheme for unit-1 & 2 IAL by tomorrow.

Thank you

cnt wait to see it

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Reply 57

7neallite

Here you go guys:

http://www.scribd.com/doc/228626471/...arking-Scheme2

And by the way the Lattice energy value is -1046KJmol-1, so ignore the lattice energy value written in the paper.