aqa AS chemistry 2019 23 MAY paper 2 UNOFFICIAL MARK SCHEME Watch

myth0000
Badges: 8
Rep:
?
#1
Report Thread starter 3 weeks ago
#1
Lets talk about it!
1
reply
alexis7869
Badges: 12
Rep:
?
#2
Report 3 weeks ago
#2
please tell me you got 60 something for the final temperature
Posted on the TSR App. Download from Apple or Google Play
1
reply
myth0000
Badges: 8
Rep:
?
#3
Report Thread starter 3 weeks ago
#3
(Original post by alexis7869)
please tell me you got 60 something for the final temperature
lol i think so it was somewhere between 60+70
1
reply
alexis7869
Badges: 12
Rep:
?
#4
Report 3 weeks ago
#4
(Original post by myth0000)
lol i think so it was somewhere between 60+70
did you also get 200 and something for the scale factor?
Posted on the TSR App. Download from Apple or Google Play
0
reply
TNOD333
Badges: 8
Rep:
?
#5
Report 3 weeks ago
#5
I got 62.7 for the final temperature
43.6 (🔺T) + 19.1 (initial temperature)
(Original post by myth0000)
lol i think so it was somewhere between 60+70
0
reply
myth0000
Badges: 8
Rep:
?
#6
Report Thread starter 3 weeks ago
#6
what was the topics of the questions that came up so i can make a mark scheme, i forgot most of em
(Original post by alexis7869)
did you also get 200 and something for the scale factor?
0
reply
myth0000
Badges: 8
Rep:
?
#7
Report Thread starter 3 weeks ago
#7
(Original post by TNOD333)
I got 62.7 for the final temperature
43.6 (🔺T) + 19.1 (initial temperature)
yeah that seems right
0
reply
alexis7869
Badges: 12
Rep:
?
#8
Report 3 weeks ago
#8
(Original post by myth0000)
what was the topics of the questions that came up so i can make a mark scheme, i forgot most of em
first question was they gave skeletal formulas and we had to identify that one was a ketone, acid and an aldehyde if i remember correctly, we had to give reagents to identify which would be which

we had a calculation which we had to find the final temperature and i got 60 something (not sure if its correct)

we had a question on methanol, and describe the effects of temperature, pressure and catalyst on the equilibrium yield, reaction rate and costs

last question in the multiple choice part was about infrared spectroscopy

enthalpy change of combustion as a calculation

why was isomer F the product that former the most instead of isomer E

we had a diagram to complete
Posted on the TSR App. Download from Apple or Google Play
0
reply
TNOD333
Badges: 8
Rep:
?
#9
Report 3 weeks ago
#9
(Original post by alexis7869)
did you also get 200 and something for the scale factor?
Got 231.8 for the scale factor
Posted on the TSR App. Download from Apple or Google Play
1
reply
alexis7869
Badges: 12
Rep:
?
#10
Report 3 weeks ago
#10
(Original post by TNOD333)
I got 62.7 for the final temperature
43.6 (🔺T) 19.1 (initial temperature)
thank youuuu so much
Posted on the TSR App. Download from Apple or Google Play
Last edited by alexis7869; 3 weeks ago
0
reply
alexis7869
Badges: 12
Rep:
?
#11
Report 3 weeks ago
#11
(Original post by TNOD333)
Got 231.8 for the scale factor
yesssssssss i think you had to divide the two values to get it
Posted on the TSR App. Download from Apple or Google Play
0
reply
alexis7869
Badges: 12
Rep:
?
#12
Report 3 weeks ago
#12
(Original post by TNOD333)
Got 231.8 for the scale factor
what about for the enthalpy of combustion, hess’s law?
Posted on the TSR App. Download from Apple or Google Play
0
reply
TNOD333
Badges: 8
Rep:
?
#13
Report 3 weeks ago
#13
(Original post by alexis7869)
what about for the enthalpy of combustion, hess’s law?
Got -160 for enthalpy of combustion
Posted on the TSR App. Download from Apple or Google Play
0
reply
alexis7869
Badges: 12
Rep:
?
#14
Report 3 weeks ago
#14
(Original post by TNOD333)
Got -160 for enthalpy of combustion
do you remember anything else? answers you got for the other questions, what did you choose in the mutiple choice question infrared spectrum
Posted on the TSR App. Download from Apple or Google Play
0
reply
TNOD333
Badges: 8
Rep:
?
#15
Report 3 weeks ago
#15
(Original post by alexis7869)
do you remember anything else? answers you got for the other questions, what did you choose in the mutiple choice question infrared spectrum
To be honest I wasn’t well of for time and I pretty much spend 30 seconds or less on most multiple choice questions.
For the infrared spectroscopy I got B (the hydroxy one) not sure If its correct though
Posted on the TSR App. Download from Apple or Google Play
0
reply
Jack-Norrie
Badges: 7
Rep:
?
#16
Report 3 weeks ago
#16
For the Hydrogen Bonding question, I got this

Name:  ffwwfwfwfwfwfwfwfwfwf.JPG
Views: 42
Size:  8.5 KB

-For the Skeletal Acid structure, I got this

Name:  fwfwwf.JPG
Views: 27
Size:  5.3 KB
0
reply
Jack-Norrie
Badges: 7
Rep:
?
#17
Report 3 weeks ago
#17
There was a 6 mark question on preparing 250cm3 of acid solution. I believe what you did was to measure beaker with a balance, then measure the mass of the acid and beaker with the balance. Then take the second reading away from the first to get accurate mass. Then add distilled water to the beaker and stir with a glass rod until dissolved. Then add that to a 250cm3 volumetric flask. Then wash the beaker with distilled water again and transfer to the volumetric flask to ensure that all dissolved acid is in the flask. Then add distilled water to the flask until it reaches the line, then state that you need to read from the bottom of the meniscus.
0
reply
Jack-Norrie
Badges: 7
Rep:
?
#18
Report 3 weeks ago
#18
There was also a question on CFCs and the Ozone layer depletion. it was split into (a) and (b):
(a) an initiation step for the CFC into the free radicals <-- 1 mark
(b) was this: •CL + O3 ->•CLO + O2
• CLO + 03 -> 2O2 + •CL <-- 2 mark



also, on another note, I also got -160 for the combustion enthalpy question, around 200 and something scale factor, and got something in the high 60's for the final temperature.
0
reply
alexis7869
Badges: 12
Rep:
?
#19
Report 3 weeks ago
#19
(Original post by TNOD333)
To be honest I wasn’t well of for time and I pretty much spend 30 seconds or less on most multiple choice questions.
For the infrared spectroscopy I got B (the hydroxy one) not sure If its correct though
i also put down B because of the peaks
Posted on the TSR App. Download from Apple or Google Play
0
reply
Jack-Norrie
Badges: 7
Rep:
?
#20
Report 3 weeks ago
#20
(Original post by alexis7869)
i also put down B because of the peaks
I think I put the Carboxylic Acid because it had a peak at O-H(alcohols) and at C=O but I could be wrong
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

  • Manchester Metropolitan University
    Undergraduate Open Day Undergraduate
    Wed, 19 Jun '19
  • University of West London
    Undergraduate Open Day - West London Campus Undergraduate
    Wed, 19 Jun '19
  • University of Warwick
    Undergraduate Open Day Undergraduate
    Fri, 21 Jun '19

How did your AQA A-level Biology Paper 3 go?

Loved the paper - Feeling positive (304)
15.18%
The paper was reasonable (1108)
55.32%
Not feeling great about that exam... (434)
21.67%
It was TERRIBLE (157)
7.84%

Watched Threads

View All