ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: Martoman on June 06, 2010, 11:00:26 am

Title: On the exam I want
Post by: Martoman on June 06, 2010, 11:00:26 am: - Electron subshells
-Atom economy
- Ask us to list principles of green chemistry
- Discuss an instantaneous dipole

Note.... they CAN test us on this. :knuppel2:
Title: Re: On the exam I want
Post by: JJ3024 on June 06, 2010, 11:21:58 am: what is atom economy???
Title: Re: On the exam I want
Post by: Martoman on June 06, 2010, 11:55:23 am: Mathy way of seeing how green/ effective the process was
Title: Re: On the exam I want
Post by: kate26 on June 06, 2010, 12:06:18 pm: is it any green chem ? or mainly green pathways vs brown pathways ?
Title: Re: On the exam I want
Post by: stonecold on June 06, 2010, 12:10:29 pm: Please elaborate on what points 3 and 4 are. :)

And I seriously doubt they would put on sub-shell configurations.
Title: Re: On the exam I want
Post by: Blakhitman on June 06, 2010, 12:22:44 pm: Well if they put anything to do with subshells, I'm definitely getting them wrong.
Title: Re: On the exam I want
Post by: happyhappyland on June 06, 2010, 12:24:58 pm: Why would they test us on this..
Title: Re: On the exam I want
Post by: crayolé on June 06, 2010, 12:35:33 pm: Even if they did give us something on those I'm sure it'd only be one measly MC question anyway ):
Title: Re: On the exam I want
Post by: matt123 on June 06, 2010, 12:36:33 pm: considering sub shells is not even highlighted in the study design and its highly basic and dosnt involve the type of chemical understanding the examiners are looking for... id give you money if they put it on
Title: Re: On the exam I want
Post by: m@tty on June 06, 2010, 12:37:24 pm: I'd say at the most there would be a multiple choice on subshells.
Title: Re: On the exam I want
Post by: shinny on June 06, 2010, 12:38:30 pm: Quote from: Martoman on June 06, 2010, 11:00:26 am
- Electron subshells
-Atom economy
- Ask us to list principles of green chemistry
- Discuss an instantaneous dipole

Note.... they CAN test us on this. :knuppel2:

Can, but highly highly unlikely. Unit 1/2 stuff IS assumed knowledge i.e. sub-shells and instantaneous dipoles, but I really don't think VCAA is that cruel to pull out something that is purely unit 1/2. Atom economy is easily testable. The principles of green chem are more likely to be applied than listed; I don't think VCAA wants you remembering a list of 12 things. The principles are pretty logical anyway.
Title: Re: On the exam I want
Post by: matt123 on June 06, 2010, 12:38:59 pm: lols matt nice name :)
Title: Re: On the exam I want
Post by: chansthename on June 06, 2010, 12:56:41 pm: Atom economy is following the formula which most of the state has forgotten, it would be cruel (then again it is VCAA that we are talking about) to test that out and I believe it is the most likely of the option that they would put onto the exam.
Title: Re: On the exam I want
Post by: coletrain on June 06, 2010, 12:58:29 pm: percentage yield is (actual mass/ theoretical mass) right?
Title: Re: On the exam I want
Post by: stonecold on June 06, 2010, 01:01:22 pm: Is atom economy:

number of atoms in desired product / number of atoms in reactants OR...

molar mass of desired product / molar mass of reactants ?
Title: Re: On the exam I want
Post by: m@tty on June 06, 2010, 01:05:43 pm: According to Wikipedia, atom economy is the percentage of mass of the desired product(s) compared to the mass of ALL of the reactants.

$\frac{M\left(Desired \ product(s)\right)}{M(ALL \ reactants)} \times 100$ .
Title: Re: On the exam I want
Post by: chansthename on June 06, 2010, 01:33:30 pm: Quote from: coletrain on June 06, 2010, 12:58:29 pm
percentage yield is (actual mass/ theoretical mass) right?
yes

Quote from: stonecold on June 06, 2010, 01:01:22 pm
Is atom economy:

number of atoms in desired product / number of atoms in reactants OR...

molar mass of desired product / molar mass of reactants ?

less desired and more along the lines of:

amount reacted into the chemical that you want *100/ total amount of reactants.
Title: Re: On the exam I want
Post by: menashiiii on June 06, 2010, 01:54:21 pm: my teacher has been saying atom economy might be put on this years exam....

hopefully not because i've completely forgot what it is!