If they ask about the production of polyethylene (1 Viewer)

[danz90]

i want a big haber process question, or one about drinking water

yesss same.

there was like no haber process questions in last year's short answer section, so expect like a 6 or 7 marker this year.

drinking water should also be in there as like 3 or 4 marks.

 

[vds700]

Thanks everyone for their input. I think i will learn both and decide whether to do both depending on how many marks the Q is worth

 

[Azreil]

Yeah I agree with Zippora
High pressure is LDPE
Hey, doesn't high temperature mean low pressure due to that ideal gas law thing?

Nup.

Gases expand when heated so unless the volume of the vessel is expanded pressure is proportional to temperature.

How the hell did I manage a HD in a university chem course yet will probably barely scrape 80 in the HSC? ><

 

[JasonNg1025]

Ok thanks
What type of question will they give on drinking water xD

 

[Azreil]

Evaluate the effectiveness of methods of sanitation and purification of drinking water.

Contrast the methods of purifying/sanitising town and drinking water.

Just 2 I pulled out of my brain >>

 

[JasonNg1025]

I know the first one, but hmm I haven't seen the second one before :O

 

[danz90]

Evaluate the effectiveness of methods of sanitation and purification of drinking water.

Contrast the methods of purifying/sanitising town and drinking water.

Just 2 I pulled out of my brain >>

To contrast, you would have to look at certain criteria I reckon, like microorganisms, and how chlorination helps to rid of pathogens, and then how reverse osmosis would do that, for example.

Also, you could contrast sand filtration with microfiltration.

That's all I can think of atm.

 

[Azreil]

I couldn't do the 2nd one tbh. I just tried to think of a difficult question. There's a section in Excel I could prolly scan and upload on it if you want.