AQA CHEMISTRY JUNE 12th 2018 UNOFFICIAL MARK SCHEME PAPER 2 Watch

Opeyemiobe123
Badges: 6
Rep:
?
#1
Report Thread starter 8 months ago
#1
Everyone put down when they remember pls 🙃
0
reply
Opeyemiobe123
Badges: 6
Rep:
?
#2
Report Thread starter 8 months ago
#2
Since no one has started an official mark scheme yet I did 😊
0
reply
Opeyemiobe123
Badges: 6
Rep:
?
#3
Report Thread starter 8 months ago
#3
What did everyone get for the arrenhius question to find activation energy??? I got 54 🙃
0
reply
zxcvbnm909
Badges: 11
Rep:
?
#4
Report 8 months ago
#4
Guys I've made a poll here https://www.thestudentroom.co.uk/sho...rimary_content
1
reply
Ashley Laura
Badges: 11
Rep:
?
#5
Report 8 months ago
#5
(Original post by Opeyemiobe123)
What did everyone get for the arrenhius question to find activation energy??? I got 54 🙃
Did you find that when you drew the gradient the points were all scattered and there was an anomaly
Posted on the TSR App. Download from Apple or Google Play
0
reply
tombster2000
Badges: 6
Rep:
?
#6
Report 8 months ago
#6
(Original post by Opeyemiobe123)
What did everyone get for the arrenhius question to find activation energy??? I got 54 🙃
55.4 it was im pretty sure.
0
reply
tombster2000
Badges: 6
Rep:
?
#7
Report 8 months ago
#7
The mechanism was elimination. Arrow from Oxygen to H+, then arrow from C-O bond to O, H2O given off, Arrow from a C-H bond to C-C bond forming a C=C bond
0
reply
About2GetLaid
Badges: 6
Rep:
?
#8
Report 8 months ago
#8
Got 54 too
0
reply
BTAnonymous
Badges: 22
Rep:
?
#9
Report 8 months ago
#9
already a mark scheme!
Posted on the TSR App. Download from Apple or Google Play
0
reply
batoolzuberi
Badges: 0
Rep:
?
#10
Report 8 months ago
#10
SAME got 54 point something. Got 181 ish for something else. Don’t rememebrr what. Also what did everyone. Write for the benzene structure and bonding. I Didn’t have much to write there
0
reply
Hamza_99
Badges: 3
Rep:
?
#11
Report 8 months ago
#11
I got 56 for the arrenhius question but i’d imagine there’s a small range
Posted on the TSR App. Download from Apple or Google Play
0
reply
Opeyemiobe123
Badges: 6
Rep:
?
#12
Report Thread starter 8 months ago
#12
Hmmm I thought it was electrophillic addition???
0
reply
tombster2000
Badges: 6
Rep:
?
#13
Report 8 months ago
#13
Kc was [C]3[D] / [A]2[B]
I think [A] was 0.021, or 0.027 not sure which I put
Tertiary structure for one of last question
Disulfide bridge on Q10 i think
the Benzene Question - Cyclic planar, Pi orbital is ring of delocalised electrons, very stable, enthalpy of H of triene was -360, for benzene more positive as bond breaking requires more energy. c-c bond length of 140pm.
The Distillation question - No Hydrogen bonds in ethanal so BP of 49oC. Heat to 49oC to just evaporate the ethanal and nothing else, takes less energy to baek IM forces.
How to maximise yield - Make sure temperature at 49oC not above so no other liquid evaporates, I also wrote to put collecting beaker in ice bath so the pure liquid doesn't evaporate.
How to test for no carboxylic acid, add few drops of NaHCO3. Effervescence? theres a carboxylic acid. We want no effervescence
1
reply
Opeyemiobe123
Badges: 6
Rep:
?
#14
Report Thread starter 8 months ago
#14
I talked about how it’s more stable by 152kjmol due to its delocalised ring of electrons and said it had a planar cyclic structure as carbon atoms only make 3 bonds so electrons in p orbital stick out above and below the plane to form a ring
0
reply
Opeyemiobe123
Badges: 6
Rep:
?
#15
Report Thread starter 8 months ago
#15
(Original post by tombster2000)
The mechanism was elimination. Arrow from Oxygen to H+, then arrow from C-O bond to O, H2O given off, Arrow from a C-H bond to C-C bond forming a C=C bond
Thought it was electorphhillic additon?
0
reply
eliza154
Badges: 10
Rep:
?
#16
Report 8 months ago
#16
-953 calorimetry
54.7 Arrhenius
1-phenylpropan-1-ol was a name of something
CBA for amine infrared multiple choice
E isomer is the least polar?
0
reply
Opeyemiobe123
Badges: 6
Rep:
?
#17
Report Thread starter 8 months ago
#17
(Original post by eliza154)
-953 calorimetry
54.7 Arrhenius
1-phenylpropan-1-ol was a name of something
CBA for amine infrared multiple choice
E isomer is the least polar?
Got the same for Arrhenius equation but the least polar thing I was lost 😂 I got 54.0
0
reply
AC1042
Badges: 5
Rep:
?
#18
Report 8 months ago
#18
is this for a level or gcse.... because if it is for gcse i am doomed.

(Original post by Opeyemiobe123)
Everyone put down when they remember pls 🙃
0
reply
Opeyemiobe123
Badges: 6
Rep:
?
#19
Report Thread starter 8 months ago
#19
(Original post by tombster2000)
Kc was [C]3[D] / [A]2[B]
I think [A] was 0.021, or 0.027 not sure which I put
Tertiary structure for one of last question
Disulfide bridge on Q10 i think
the Benzene Question - Cyclic planar, Pi orbital is ring of delocalised electrons, very stable, enthalpy of H of triene was -360, for benzene more positive as bond breaking requires more energy. c-c bond length of 140pm.
The Distillation question - No Hydrogen bonds in ethanal so BP of 49oC. Heat to 49oC to just evaporate the ethanal and nothing else, takes less energy to baek IM forces.
How to maximise yield - Make sure temperature at 49oC not above so no other liquid evaporates, I also wrote to put collecting beaker in ice bath so the pure liquid doesn't evaporate.
How to test for no carboxylic acid, add few drops of NaHCO3. Effervescence? theres a carboxylic acid. We want no effervescence

Got everything same as you 😊😊😊 expect Maxine yield question
1. Said to wash with water and filter to remove any soluble impurities and dry with absorbent paper to remove any traces of water after distillation
2. Filterate hot to remove any insoluble impurities
0
reply
eliza154
Badges: 10
Rep:
?
#20
Report 8 months ago
#20
(Original post by AC1042)
is this for a level or gcse.... because if it is for gcse i am doomed.
A level don't worry haha
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of Roehampton
    Department of Life Sciences; Department of Psychology Undergraduate
    Thu, 21 Feb '19
  • Edge Hill University
    Undergraduate and Postgraduate - Campus Tour Undergraduate
    Thu, 21 Feb '19
  • St George's, University of London
    Postgraduate Open Evening Postgraduate
    Thu, 21 Feb '19

Is the plastic tax enough to protect the environment?

Yes (4)
4%
No (96)
96%

Watched Threads

View All