Chemistry paper thoughts (1 Viewer)

[ml125]

Also, is the marking similar to maths where they would read crossed out answers? Seems i got close to one of the calculations but I accidentally crossed it out :<

They'll usually mark it if you haven't written anything that contradicts it

Feelsbad did a good half a pg of working in trials, crossed it out - wrote like less than a sentence that somehow denied its validity. Turns out initial working was perfect ggwp bye 4 marks

 

[ChopinBalladeNo1]

What'd you guys put for the steps to reducing ozone depletion question?

 

[Esse]

What'd you guys put for the steps to reducing ozone depletion question?

Kyoto, HCFCs, HFCs

 

[DatAtarLyfe]

Kyoto, HCFCs, HFCs

Same thing but montreal instead of kyoto

 

[Esse]

Same thing but montreal instead of kyoto

Fk i meant montreal woops

 

[RachelGreen]

Steps I wrote to reduce CFCs was that mentioned above plus, removing chloride radicals through its reaction with methane and also removing chlorine monoxide radicals from the atmosphere through its reaction with nitrogen dioxide

 

[cookie_dough]

yea i first i wrote HOW it depletes the ozone layer, than about montreal, HCFC's, HFC's and also that it is being monitored with photospectometry

 

[DatAtarLyfe]

Since it's a 6 marker, i think giving 3 points and sufficiently explaining them should suffice

 

[Sien]

yea i first i wrote HOW it depletes the ozone layer, than about montreal, HCFC's, HFC's and also that it is being monitored with photospectometry

SHIT I totally forgot about that ozone detection thing

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[cookie_dough]

SHIT I totally forgot about that ozone detection thing

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dont worry about it, it probably wasnt necessary cos its not technically a solution to ozone depletion

 

[Ambility]

Is the answer to the multiple choice question 16 really A? I thought it would be B, as those half equations have the highest resultant potential...

 

[trecex1]

Is the answer to the multiple choice question 16 really A? I thought it would be B, as those half equations have the highest resultant potential...

It is B, where does it say it is A?

 

[Ambility]

It is B, where does it say it is A?

On the ATAR notes suggested answers thread. People are saying that it must be A because the cell reaction needs to have ions of 2+ oxidation state. If that's the case it is A, if not it is B as it has a higher EMF but aluminium has a 3+ oxidation state.

 

[trecex1]

On the ATAR notes suggested answers thread.

It's 100% B, check the reduction potentials sheet.
Also dont agree with a few of their short answer criteria, but no one knows how bostes will mark so just hope for the best.

 

[trecex1]

On the ATAR notes suggested answers thread. People are saying that it must be A because the cell reaction needs to have ions of 2+ oxidation state. If that's the case it is A, if not it is B as it has a higher EMF but aluminium has a 3+ oxidation state.

No that's not correct, if you read it carefully it says for that particular cell it can be expressed in that notation (as that cell notation is no longer taught in the syllabus so students may not be familiar).
Then it says in which of the following cells will produce the max voltage.
The fact that al is 3+ is irrelevant since you're not replacing Q and P with the given the metals and ions, each of the 'following cells' is independent but just written in that notation.

 

[Esse]

No that's not correct, if you read it carefully it says for that particular cell it can be expressed in that notation (as that cell notation is no longer taught in the syllabus so students may not be familiar).
Then it says in which of the following cells will produce the max voltage. The original cell was given as an example.

Bro I literally shat my pants when I saw it was A. And now you give me reassurance. Cause that answer was exactly what Ambility said, something about how B is disregarded as it is not 2+. THANK FUCK

 

[Esse]

Cause they just showed how to denote that particular type of cell. The q that followed had nothing to do with the information provided yeah, apart from showing how to identity oxidation and reduction through the notation?

 

[trecex1]

Cause they just showed how to denote that particular type of cell. The q that followed had nothing to do with the information provided yeah, apart from showing how to identity oxidation and reduction through the notation?

Yeah if you did papers from before 2010 or something they frequently used this notation to show cells.
The question didn't say which combination of Q and P will give highest voltage, it just said which cell.

 

[Esse]

Yeah if you did papers from before 2010 or something they frequently used this notation to show cells.
The question didn't say which combination of Q and P will give highest voltage, it just said which cell.

Idk man im on edge cause they put Q and R. So maybe it had to be in reference to the question given. ZZzzzzz

 

[marioyoshi]

agreed you are definetely correct. answer is B.