Chemistry Predictions/Thoughts (9 Viewers)

[HappyTheSkibidi]

Make sure we know where to put a synthesis company!

 

[nowomansland]

had a q from 2024 give "1L" and that was technically used in the calculation to find concentration, would you guys say to give in 3sf (the rest of values were 3sf) or 1sf (bc 1 is 1sf, they didnt give 1.00L)

btw which question is it

 

[nowomansland]

Also for some reason textbooks ALWAYS get sig figs wrong what is up with that

even the hsc marking guidelines don't use the correct sig figs for a lot of qs ive noticed only matrix's answers do that

 

[PinkZebra1392]

Also question, in module 8 do you think we need to know how to draw diagrams for all of the instrumental analysis tecniques?? I've only really ever heard of having to draw one for as AAS, but would we need to know how to draw ones like mass spectrometry too?

 

[Baliistic]

IUPAC preferred names might be things like but-2-ene but the real world will ignore IUPAC and continue to call it 2-butene.

A name like 2-propanol is easy to say, while propan-2-ol sticks in the throat.

You should be fine they always accept other naming conventions (this is a screenshot from the 2019 marking guidelines)

 

[nobodyhome]

might be a stupid question but are we gonna be asked for the uses of polymers or to compare LDPE/HDPE or smth??? or do we just have to do stuff like draw the monomer from a given polymer (and vice versa)

 

[eternallyboreduser]

Bro guys how the fuvk do u rmbr all the poylmer stuff i sctually cant

 

[nowomansland]

Bro guys how the fuvk do u rmbr all the poylmer stuff i sctually cant

i hate it smsmmsmsmsmmsms

 

[Trial&Error]

might be a stupid question but are we gonna be asked for the uses of polymers or to compare LDPE/HDPE or smth??? or do we just have to do stuff like draw the monomer from a given polymer (and vice versa)

They likely won't specify LDPE and HDPE, but they might say any of the polymers mentioned in the syllabus. Or they might give an unseen polymer and ask to give possible uses and stuff.

 

[anonymoushehe]

nein, 12 days ago

damn

 

[Trial&Error]

Bro guys how the fuvk do u rmbr all the poylmer stuff i sctually cant

Just memorise their structures and uses which are pretty intuitive from their names and everyday uses. And know what properties of a polymer, gives it certain characteristics. Then you'll be able to assess anything, seen and unseen.

 

[RedDragonStar1]

They likely won't specify LDPE and HDPE, but they might say any of the polymers mentioned in the syllabus. Or they might give an unseen polymer and ask to give possible uses and stuff.

What are the polymers in the syllabus? I don't know since I was allowed to pick any polymer for my internal assessment task and was weird and chose bakelite for some reason (watching too much dr stone)

 

[Trial&Error]

What are the polymers in the syllabus? I don't know since I was allowed to pick any polymer for my internal assessment task and was weird and chose bakelite for some reason (watching too much dr stone)

PE
PVC
PS
PTFE
nylon
polyesters

 

[coolcat6778]

even the hsc marking guidelines don't use the correct sig figs for a lot of qs ive noticed only matrix's answers do that

lol significant figure isn't mentioned in the syllabus. how have we got to a point where asshole teachers make their own rules?

 

[RedDragonStar1]

PE
PVC
PS
PTFE
nylon
polyesters

tysm, gonna research them rn just in case

 

[anonymoushehe]

lol significant figure isn't mentioned in the syllabus. how have we got to a point where asshole teachers make their own rules?

they only care about sf once in the whole exam so its usually specified in the marking criteria for one calculation question in the exam - they then mark the rest of the paper without considering sf so its fine if u mess up once

 

[Trial&Error]

will the question they mark down for wrong sf normally be a surface level calculation?

It's normally (but not guaranteed) in questions where the lowest sigfigs are 3 or 4. Maybe titrations or Keq or solubility.

 

[anonymoushehe]

will the question they mark down for wrong sf normally be a surface level calculation?

uhh not too sure u can take a look at the past hsc papers and see which calculations quesitons usually get the sf in the criteria, but i would assume its probably the very first calculation q but idk

 

[eternallyboreduser]

wait guys for soaps and detergents what soecifically do we gotta know

 

[coolcat6778]

uhh not too sure u can take a look at the past hsc papers and see which calculations quesitons usually get the sf in the criteria, but i would assume its probably the very first calculation q but idk

yeah I checked, it's just one calc question and one mark that's it. Our stupid school deducts marks more than once