HSC Chemistry 2017

[Invat]

for q28 for the advantages/disadvantages of ethanol is it acceptable to talk about more general disadvantages e.g. opportunity cost of land to grow crops which are instead used to make fuel, or did it specifically have to link to its function in cars?

I think it is fine as the the only reason why we would replace normal fuel (such as octane) with ethanol was if it was produced in a renewable way. Hence the use of arable land over food to grow sugar cane that is used to produce ethanol would be a fine disadvantage of replacing current fuels with ethanol

[J.B]

For Industrial Chem were we had to name x and y, I put sodium hydrogen carbonate and calcium oxide, since it said name. Is this right?

[Zainbow]

For Industrial Chem were we had to name x and y, I put sodium hydrogen carbonate and calcium oxide, since it said name. Is this right?

I think that's alright yeah 

[Happy Physics Land]

for q28 for the advantages/disadvantages of ethanol is it acceptable to talk about more general disadvantages e.g. opportunity cost of land to grow crops which are instead used to make fuel, or did it specifically have to link to its function in cars?

The question did speak about the usage of ethanols so that's why I was going a bit practical. But I feel like renewable energy and opportunity cost are also very valid and very acceptable points to make!

[Happy Physics Land]

For Industrial Chem were we had to name x and y, I put sodium hydrogen carbonate and calcium oxide, since it said name. Is this right?

Yep! You are definitely right! All industrial chemistry solutions are out now so have a look for yourself!

[RuiAce]

Yep! You are definitely right! All industrial chemistry solutions are out now so have a look for yourself!

累了吗你？

[Happy Physics Land]

累了吗你？

Nah not really
No Chinese here Rui!
谢谢你！

[RuiAce]

Nah not really
No Chinese here Rui!
谢谢你！

Was bored.

[phopo]

For the Question about Sulfur released into atmosphere at Coal burning fuel site and Mining site, I reckon you had to talk about how the amount of So2 gas reduced as you got futher away from the darker, shaded in regions because the released SO2 will dissolve in water vapour in atmosphere to form acid rain.

[hanaacdr]

what was the answer to industrial (a)- where the ester was used as a reactant?

[Nick Seb]

For the Question about Sulfur released into atmosphere at Coal burning fuel site and Mining site, I reckon you had to talk about how the amount of So2 gas reduced as you got futher away from the darker, shaded in regions because the released SO2 will dissolve in water vapour in atmosphere to form acid rain.

Or that x quantity of SO2 is diffusing into an increasing volume of air so its relative concentration continually drops as it radiates out from the source, lol. You'd likely also have to refer to the white area and briefly outline why it's like that (I wrote about natural sources contributing to the low concentrations).

~Nick

[Nick Seb]

For 31bi, given that the question was 2 marks, shouldn't the new curve also reach equilibrium more rapidly, as temperature was increased which increases reaction rate?

~Nick

[Henry Kocatekin]

Hi, In your opinion, what will equate to a band 6?
Also, what do you think a raw of 92 will equate to?

Many thanks,

[Happy Physics Land]

For 31bi, given that the question was 2 marks, shouldn't the new curve also reach equilibrium more rapidly, as temperature was increased which increases reaction rate?

~Nick

Good Observation! Thank you for that advice! Sorry I was trying to finish my uni assignment at the same time as I am doing this. But yes, definitely on the ball!

[Happy Physics Land]

Hi, In your opinion, what will equate to a band 6?
Also, what do you think a raw of 92 will equate to?

Many thanks,

Hey Henry!

Congratulations for such an amazing raw mark! If you do get this kind of mark, chances are you can receive 95 or 96 scaled mark, or even higher depending on how everyone else in the state did.