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Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

Edexcel Chemistry AS Unit 2- 16th January 2013

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Original post by flightlessbirds

I also put butanamine and I googled it when I got home and apparently it's the same thing as butylamine so hopefully we get a mark :smile:

:smile:

and yes I put the Ea one for that

Posted from TSR Mobile

the bond angle was 104.5.....non linear shape

sorry it was 119.5 for the first one then 104.5

does anyone have access to the paper ?? if yes could you please send it to me ?? thanks !! :smile:

:smile:

Original post by mrcool1995

sorry it was 119.5 for the first one then 104.5

do you think 107 will be alright for the 1st one :O

was the answer about the branches alkane having a lower bp than the straight chain one, due to weaker london forces due to fewer points of contact on the branched one ... omg idk ??? :smile:

:smile:

thanks

i dont think so...cos it was 3 electron pairs and one of them was a lone pair...therefore that is 120....did u put 104.5 for second?

was the answer about the branches alkane having a lower bp than the straight chain one, due to weaker london forces due to fewer points of contact on the branched one ... omg idk ??? :smile:

:smile:

thanks

Original post by flightlessbirds

I also put butanamine and I googled it when I got home and apparently it's the same thing as butylamine so hopefully we get a mark :smile:

:smile:

and yes I put the Ea one for that

Posted from TSR Mobile

i was so lost on this question i thought omg is it butanamine or butaneamine or butanamide lol i put butanamine in the end :tongue:

:tongue:

Original post by mrcool1995

sorry it was 119.5 for the first one then 104.5

I got that too. Put <120 for the first one which is what my text book says so hope that's ok.
I found the paper to be fairer than unit 1 last week. Interesting not a single definition asked for on either though - they must be phasing that out or something?

grade boundaries anyone?

Original post by mrcool1995

i dont think so...cos it was 3 electron pairs and one of them was a lone pair...therefore that is 120....did u put 104.5 for second?

but isnt trigonal planar 3 bond pairs and no lone pairs

it was 2 bond pairs and 1 lone pair wasnt it ?
becasue it was c-c-c
each c has 4 electrons in the outer shell
so it forms single bonds with the other 2 c's leaving a lone pair of e's on the middle carbon so 2 bond pairs and 1 lone pair
but yeah i see - i think you are right :tongue:

:tongue:

yeah i put 104.5 for the 2nd one :smile:

:smile:

Original post by mrcool1995

grade boundaries anyone?

i
its usually about 63 for an A right ? i dont think it will change much tbh

(edited 11 years ago)

what mechanism were we supposed to draw? and was it for the straight chain halogenoalkane with Br at the end or the branched one with I?

OP

How did everyone find the paper? How did you found it compared to unit 4?

Original post by David Tennant

How did everyone find the paper? How did you found it compared to unit 4?

it was easier than unit 4 i think.... unit 4 really screwed me over :~(
how'd you find it ?

xxrebeccabexixx

Original post by jojo1995

but isnt trigonal planar 3 bond pairs and no lone pairs

it was 2 bond pairs and 1 lone pair wasnt it ?
becasue it was c-c-c
each c has 4 electrons in the outer shell
so it forms single bonds with the other 2 c's leaving a lone pair of e's on the middle carbon so 2 bond pairs and 1 lone pair
but yeah i see - i think you are right :tongue:

:tongue:

yeah i put 104.5 for the 2nd one :smile:

:smile:

i
its usually about 63 for an A right ? i dont think it will change much tbh

It was bonded to 2 carbons and 1 hydrogen so it just had one electron not bonded. It was also in a hexagonal shape so maths shows the angle is 120

Original post by xxrebeccabexixx

It was bonded to 2 carbons and 1 hydrogen so it just had one electron not bonded. It was also in a hexagonal shape so maths shows the angle is 120

okay, i didnt see a hydrogen, i guess i didnt read the q properly... thanks

can someone please post all of the answers

Original post by Dxtremo

can someone please post all of the answers

yes

what did u guys draw for the skeletal formula

wasnt the Mg0 in the multiple choice and I put something like the collision are more or something cant remember...

Original post by Holly246

wasnt the Mg0 in the multiple choice and I put something like the collision are more or something cant remember...

i PUT DOWN the stuff about energy
it was in the MC :smile:

:smile:

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