HSC Chemistry Exam Solutions / Thoughts (3 Viewers)

Arrowshaft

Well-Known Member
Joined
Sep 2, 2018
Messages
565
Location
NSW
Gender
Male
HSC
2019
I guess one of us is wrong... in the case that u have the right process but Ofc get the answer and conclusion wrong for cu, it’s only a 2 mark deduction? Right?
Ah that’s good. I hope so! I mean I got the calibration curves and everything for both Cu and Pb, hopefully I only lose 2 marks for that, not anymore. Man I hate silly mistakes 😩
 

AHafza

Member
Joined
Feb 21, 2018
Messages
64
Gender
Male
HSC
2019
Ah that’s good. I hope so! I mean I got the calibration curves and everything for both Cu and Pb, hopefully I only lose 2 marks for that, not anymore. Man I hate silly mistakes 😩
Who knows I may have made the mistake 😂 don’t worry it may be my silly mistake..
 

AHafza

Member
Joined
Feb 21, 2018
Messages
64
Gender
Male
HSC
2019
Yes under standard conditions doesn’t dissolve... it will only dissolve at low temp white an initial temp required.
I gave a bit extra info because I had heaps of time left but the bottom line is it doesn’t dissolve, well i think so.
 

Arrowshaft

Well-Known Member
Joined
Sep 2, 2018
Messages
565
Location
NSW
Gender
Male
HSC
2019
I gave a bit extra info because I had heaps of time left but the bottom line is it doesn’t dissolve, well i think so.
Did you say for MgCl2 it tends toward a crystal lattice structure but the release of heat during the exothermic process, it distorts and tends toward randomness through freely moving ions in a solution?
 

AHafza

Member
Joined
Feb 21, 2018
Messages
64
Gender
Male
HSC
2019
Did you say for MgCl2 it tends toward a crystal lattice structure but the release of heat during the exothermic process, it distorts and tends toward randomness through freely moving ions in a solution?
I forgot to make that point 😬
 

flowerp

Active Member
Joined
May 15, 2017
Messages
124
Gender
Undisclosed
HSC
N/A
Wait did you get effective for cu? I got 1.26 something for Cu...
Yes same I also got that! What did people put for the MC q about radioactiviy and for the last MC q? Kind disappointed about the 3marker on enthalpy and the functional isomer q cuz I got confused about positional and functional isomers but overall the trst was okay ! Also are ketones acidic?
 

AHafza

Member
Joined
Feb 21, 2018
Messages
64
Gender
Male
HSC
2019
I don’t think they’ll mark with that much detail for a 3 marker so dw. What are your predictions on band 6 cut offs?
I think we are looking at around 80-82 it feels like their are a few questions that are completely new while the exam overall wasn’t too hard
 

AHafza

Member
Joined
Feb 21, 2018
Messages
64
Gender
Male
HSC
2019
Yes same I also got that! What did people put for the MC q about radioactiviy and for the last MC q? Kind disappointed about the 3marker on enthalpy and the functional isomer q cuz I got confused about positional and functional isomers but overall the trst was okay ! Also are ketones acidic?
Ketones aren’t acidic I’m pretty sure, I used oxidation to differentiate between ketones and aldehydes
 

AHafza

Member
Joined
Feb 21, 2018
Messages
64
Gender
Male
HSC
2019
Yes same I also got that! What did people put for the MC q about radioactiviy and for the last MC q? Kind disappointed about the 3marker on enthalpy and the functional isomer q cuz I got confused about positional and functional isomers but overall the trst was okay ! Also are ketones acidic?
I got 1% for the last one and filtrate only for the radioactivity
 

flowerp

Active Member
Joined
May 15, 2017
Messages
124
Gender
Undisclosed
HSC
N/A
Ketones aren’t acidic I’m pretty sure, I used oxidation to differentiate between ketones and aldehydes
Phew! yea same I used oxidation but then to confirm then presence of the acid l also wrote about the litmus test
 

Arrowshaft

Well-Known Member
Joined
Sep 2, 2018
Messages
565
Location
NSW
Gender
Male
HSC
2019
Ketones aren’t acidic I’m pretty sure, I used oxidation to differentiate between ketones and aldehydes
Oxidation and addition of sodium carbonate powder. Whichever bubbles contains aldehyde as it wouldve oxidised to a carboxyllic acid releasing co2
 

Arrowshaft

Well-Known Member
Joined
Sep 2, 2018
Messages
565
Location
NSW
Gender
Male
HSC
2019
I think we are looking at around 80-82 it feels like their are a few questions that are completely new while the exam overall wasn’t too hard
Hopefully I can band 6 then haha
 

AHafza

Member
Joined
Feb 21, 2018
Messages
64
Gender
Male
HSC
2019
Oxidation and addition of sodium carbonate powder. Whichever bubbles contains aldehyde as it wouldve oxidised to a carboxyllic acid releasing co2
Can u use blue litmus paper? I was initially going to put co2 effervescence with carbonate but changed it last minute.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 3)

Top