Predictions for Chemistry 2014 HSC? (5 Viewers)

[seventhroot]

We did a Haber question earlier

fsiasababsualasbasul; so if there were 2 similar questions in the HSC paper; will you write "dear marker; pls refer to Q28; It is sort of the same thing"?

 

[faisalabdul16]

so if there were 2 similar questions in the HSC paper; will you write "dear marker; pls refer to Q28"?

Hsc wouldn't ask a question on Haber for 7 marks, then ask another Haber question, with the answer already in the previous.

 

[seventhroot]

Hsc wouldn't ask a question on Haber for 7 marks, then ask another Haber question, with the answer already in the previous.

how do you know?

 

[faisalabdul16]

how do you know?

Because they're not stupid to repeat questions.

 

[seventhroot]

Because they're not stupid to repeat questions.

they asked 2 similar questions: http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2010exams/pdf_doc/2010-hsc-exam-physics.pdf

gg no re


be prepared m9

 

[faisalabdul16]

they asked 2 similar questions: http://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2010exams/pdf_doc/2010-hsc-exam-physics.pdf

gg no re


be prepared m9

Kkkkk end derail

 

[seventhroot]

Kkkkk end derail

gg no re; 204 quick scoped rekt m9

so the question:

explain how the use of a catalyst lowers the reaction temperature required, in your answer; also identify the catalyst(s) used in the Haber process (4 marks)

 

[faisalabdul16]

Describe how AAS works and give an example of a metal that we need to constantly monitor. (Provide health problems associated with the metal)

 

[Queenroot]

gg no re; 204 quick scoped rekt m9

so the question:

since he didn't answer it I will
Catalyst is a porous iron magnetite.
- provides larger surface area for reaction to take place
- lowers activation energy and thus keeps the reaction in a limited temp range
- speeds up reaction rate

Can't remember if anything else

 

[faisalabdul16]

since he didn't answer it I will
Catalyst is a porous iron magnetite.
- provides larger surface area for reaction to take place
- lowers activation energy and thus keeps the reaction in a limited temp range
- speeds up reaction rate

Can't remember if anything else

Answer mine

 

[QZP]

Is there a difference between manage vs monitor they want usto pick on? :S

Yeah, I think they want us to talk about instruments (total ozone mapping spectrometer, dobson ozone spectrometer, etc) instead of what we do to manage ozone depletion?

hahaha my bad sorry.

Evaluate the importance of monitoring and managing the conditions used in the Haber process. - 7 marks

Pretty decent question, but marking criteria i would assume wants top-notch detail lol

@SSH Oh I was talking about this question

 

[faisalabdul16]

@SSH Oh I was talking about this question

I don't think they'd be fussy over you specifically saying managing is this and monitoring is this.
But for 7 marks, i think they would want stuff like compromise conditions, but also how gas liquid chromatography is used to ensure catalyst has not been poisoned and the ratio of nitrogen to hydrogen is 1 to 3.

 

[Queenroot]

Describe how AAS works and give an example of a metal that we need to constantly monitor. (Provide health problems associated with the metal)

Answer mine

Fuck AAS

 

[seventhroot]

Fuck AAS

Do you mean one of the congruence tests?

 

[faisalabdul16]

Fuck AAS

Yeah seventhroot does to your AAS.

-------------------------------------------

Hopefully there is no AAS questions in this years paper. I don't like it as much.

 

[QZP]

I don't think they'd be fussy over you specifically saying managing is this and monitoring is this.
But for 7 marks, i think they would want stuff like compromise conditions, but also how gas liquid chromatography is used to ensure catalyst has not been poisoned and the ratio of nitrogen to hydrogen is 1 to 3.

Where did you find this? T_T You seem to know a lot more detail than me. I would have just wrote monitor catalyst to ensure ...

 

[seventhroot]

Yeah seventhroot does to your AAS.

Doesn't even make sense m9

 

[faisalabdul16]

Where did you find this? T_T You seem to know a lot more detail than me. I would have just wrote monitor catalyst to ensure ...

You know for the dot point which requires you to know about a person working in a particular branch of chemistry and what principle they use?

My example is:

John Smith is a production chemist at a plant which produces ammonia through the Haber process. The branch of chemistry that he undertakes is analytical chemistry which involves the analysis of the chemical contents of substances and mixtures. A chemical principle that John will employ is that of solubility as he uses gas-liquid chromatography to identify the substances present as the gas is passed over a liquid stationary phase. If the ratio of nitrogen to hydrogen is not roughly 1:3, efficiency may be reduced. In addition, if carbon monoxide or sulfur is present, the catalyst may be poisoned, resulting in the need for it to be replaced.

 

[Queenroot]

Where did you find this? T_T You seem to know a lot more detail than me. I would have just wrote monitor catalyst to ensure ...

You know for the dot point which requires you to know about a person working in a particular branch of chemistry and what principle they use?

My example is:

John Smith is a production chemist at a plant which produces ammonia through the Haber process. The branch of chemistry that he undertakes is analytical chemistry which involves the analysis of the chemical contents of substances and mixtures. A chemical principle that John will employ is that of solubility as he uses gas-liquid chromatography to identify the substances present as the gas is passed over a liquid stationary phase. If the ratio of nitrogen to hydrogen is not roughly 1:3, efficiency may be reduced. In addition, if carbon monoxide or sulfur is present, the catalyst may be poisoned, resulting in the need for it to be replaced.

In simpler words, the catalyst is analysed for impurities which may interfere with the reaction.

 

[seventhroot]

You know for the dot point which requires you to know about a person working in a particular branch of chemistry and what principle they use?

My example is:

John Smith is a production chemist at a plant which produces ammonia through the Haber process. The branch of chemistry that he undertakes is analytical chemistry which involves the analysis of the chemical contents of substances and mixtures. A chemical principle that John will employ is that of solubility as he uses gas-liquid chromatography to identify the substances present as the gas is passed over a liquid stationary phase. If the ratio of nitrogen to hydrogen is not roughly 1:3, efficiency may be reduced. In addition, if carbon monoxide or sulfur is present, the catalyst may be poisoned, resulting in the need for it to be replaced.

Who's john smith?