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EDEXCEL UNIT 2 (RESIT) 2016 Answers

Haven't seen a thread for Edexcel AS chemistry unit 2 RESIT, so post on here what you think you got for answers and open for general discussion about the exam! good luck to everyone who is sitting this exam and see you in 2 hours.

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It was fairly easy, some odd questions but nothing horrible

Reply 3

FlowaPowa

Was the reactivity of the halogenoalkanes A, B, C or C, B, A, I think it's due to the inductive effect but I couldn't work out which way it would result in still

Reply 4

RUNSran

Original post by FlowaPowa

Was the reactivity of the halogenoalkanes A, B, C or C, B, A, I think it's due to the inductive effect but I couldn't work out which way it would result in still

A,B,C

Reply 5

ManofironLC

Original post by RUNSran

A,B,C

I put C,B,A ****

Reply 6

srg101

What did people get for the last question? the mass of iodine

i got 80 something :s-smilie:

(edited 7 years ago)

Reply 7

Crespo0008

Original post by ManofironLC

I put C,B,A ****

I put CBA as well

Reply 8

Crespo0008

Original post by srg101

What did people get for the last question?

i got 80 something :s-smilie:

Think like 80.6?

Reply 9

JamieP123

CBA and 80.6 are correct

Reply 10

Fmathslad

Personally i think that the multiple choice questions were very easy and there a few questions that were tricky. the bond question about the angles and stuff really messed me up but other than that wasn't too bad

Reply 11

srg101

What did people get for the shape for the first question? and how was bf3 bonded to nf3?

Reply 12

RUNSran

Original post by JamieP123

CBA and 80.6 are correct

i thought c forms a tertiary carbocation and tertiary carbocation is more stable so less easily it reacts so c will react slowly. No?

(edited 7 years ago)

Reply 13

notsoclueless

Original post by Crespo0008

Think like 80.6?

114.21 is what I got
something like 0.45 x (126.9x2)

Reply 14

RUNSran

Original post by notsoclueless

114.21 is what I got
something like 0.45 x (126.9x2)

yeah i got something similar - dont know how people got 80 something. What was the moles of s203 that reacted in the blank titration?

Reply 15

Fmathslad

Original post by srg101

What did people get for the shape for the first question? and how was bf3 bonded to nf3?

was bonded by hydrogen bonding from the F-N, the first question i put original pyramidal and BA was 102? not sure

Reply 16

Fmathslad

Original post by RUNSran

i thought c forms a tertiary carbocation and tertiary carbocation is more stable so less easily it reacts so c will react slowly. No?

C was a tertiary halogenoalkane and they for precipitate almost instantaneously, then they secondary halogenoalkane is slight slower, leading to the primary which is much slower

Reply 17

Peppercrunch

That's weird. Loads of people at my school got that BF3 bonded to NF3 via a dative covalent bond and quite a few people got like around 40 for the iodine question at the end.

Reply 18

JoeyTr

Both of us from our school got 80 for the iodine. Paper was fine overall.

Reply 19

setarcos

Original post by Fmathslad

was bonded by hydrogen bonding from the F-N, the first question i put original pyramidal and BA was 102? not sure

First bond angle + shape: 120 and trigonal planar

Bond angle for second one: 107 (resembles NH3)

and bond is dative covalent due to lone pair of electrons on nitrogen