MedVision ad

General Thoughts: Chemistry (1 Viewer)

habitres

habitres

Member
Joined
Nov 18, 2011
Messages
110
Location
NSW
Gender
Male
HSC
2012
catherineinabox said:
what did u guys say the digram with the balls (molecular model) thing was? Please tel me it was addition polymerisation
Click to expand...
Yep.
It was addition polymerisation of ethylene through the initator method (though the second bit wasn't needed, just fyi)
 
madharris

madharris

Well-Known Member
Joined
Oct 23, 2011
Messages
2,160
Gender
Undisclosed
HSC
N/A
Everything was pretty straight forward except for a few multiplechoice questions, the acid tablet question and the mercury questions.

THANK YOU SHIPWRECKS!!! :D
 
TheOptimist

TheOptimist

Member
Joined
Sep 24, 2012
Messages
475
Location
__̴ı̴̴̡̡̡ ̡͌l̡̡̡ ̡͌l̡*̡̡ ̴̡ı̴̴̡ ̡̡͡|̲̲̲͡͡͡ ̲▫̲͡ ̲̲
Gender
Male
HSC
2012
Uni Grad
2018
Killersoloes said:
Hey, somehow I got 2450 for K, since the number of moles changed from 0 to 0.198 for Nitrogen, Hydrogen would have the same concentration since they are in equal amounts in the equation. Since that adds up to 0.396 there would have been 0.004 moles left of NO thus i got 0.198^2/0.004^2.
Click to expand...
This is correct imo :)
 
Z

ZombieApocalypse

:)
Joined
Mar 20, 2011
Messages
2,180
Gender
Male
HSC
N/A
i hated it. fak u bos.


dat mc really screwed me over.


btw can we use BOD and DO for the eutrophication? i said it linked to algal blooms


and yeah, idk how i did in the aspirin q. defs failed in the fish one.
 
LifeBoats

LifeBoats

Wizard.
Joined
Nov 10, 2009
Messages
169
Location
Dunder Mifflin
Gender
Female
HSC
2012
ZombieApocalypse said:
i hated it. fak u bos.


dat mc really screwed me over.


btw can we use BOD and DO for the eutrophication? i said it linked to algal blooms


and yeah, idk how i did in the aspirin q. defs failed in the fish one.
Click to expand...
Yes, you can. But it's not the most accurate method due to the many other external factors that can influence the amount of organic matter in the system and amount of DO. Then again, you'll probably get the marks anyway.
 
gayforniall

gayforniall

Member
Joined
Oct 15, 2012
Messages
104
Location
Luminiferous Aether
Gender
Male
HSC
2012
Uni Grad
2017
It wasn't too bad, some of the multiple choice were bad though. And it was overall a pretty fun exam. YAY I'M FINALLY FREE!
 
K

karimingo

New Member
Joined
Mar 8, 2011
Messages
6
Gender
Male
HSC
2012
chemistry was harder this year then other past papers.... multiple choice some were confusing... the fish question was a retard...
 
S

Sindivyn

Member
Joined
Mar 4, 2012
Messages
194
Gender
Male
HSC
2012
Killersoloes said:
Hey, somehow I got 2450 for K, since the number of moles changed from 0 to 0.198 for Nitrogen, Hydrogen would have the same concentration since they are in equal amounts in the equation. Since that adds up to 0.396 there would have been 0.004 moles left of NO thus i got 0.198^2/0.004^2.
Click to expand...
Your answer is correct. I made a mistake (got 0.04 moles instead of 0.004) :(
 
Magical Kebab

Magical Kebab

Member
Joined
Oct 4, 2011
Messages
708
Gender
Male
HSC
2013
two quick questions if anyone can help... Nothing to do with the exam...
in a galvanic cell, conventionally you put the anode on the left and cathode on the right.. Does it matter if it's the other way around?
Also, taking for example zinc and copper, the redox reaction here takes place by the zinc losing the electrons and forming ions if I'm right..what makes the zinc lose electrons in the first place anyway?

Thanks..
 
You must log in or register to reply here.

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top