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re: HSC Chemistry Marathon Archive WHY does a galvanic cell work? As in, you have two seperate half cells (say of zinc and copper). How does the zinc know to oxidise?

re: HSC Chemistry Marathon Archive I haven't read the working but the answer is right. You could do it without calcs though- by adding 900ml of water, you made the concentration of H+ one tenth of what it was before and since ph is a logarithmic scale, the ph goes up 1

re: HSC Chemistry Marathon Archive Oh and while we're doing pH calculations, after someone does Sy's one, try this: Q: What is the pH of a 10L solution of hydrochloric acid that contains 1x10^-8 moles of HCl in it?

Just a general tip to OP: Please don't make getting .95 the determinant of your success. When you're at that top end of the ATAR spectrum, one small thing brings you down. A lot of it comes down to how you go on the day, whether the questions sorta suit you, whether you are in the zone etc. I've...

Yeah it probably wouldn't because the SAME person didn't top the state in all of them. I think that if it was the same person topping each of them, the top scaled mark would be higher than what it is now- thus allowing the .95. I'm just speculating here though- I'm not sure- I'll email UAC haha...

Actually I've always wondered about this. I know some subjects are capped in terms of top scaled mark BUT the reason why they are capped is because the performance of the cohort of that sub is so poor in comparison to the rest of state average, that even the top scaled mark might be say 48/50 or...

re: HSC Chemistry Marathon Archive About to go for a swim so don't have time to comment properly but: - Easiest way to answer that would be in a table - Distinguish between LDPE and HDPE (i.e. mention specifically which one you are talking about) - Distinguish between crystal polystyrene...

Yes. You'll probably need the following marks (and SOR II won't count because of scaling unless you pretty much come top three in state). Chem- 96 Phys- 96 Bio- 96 Maths- 98 English- 95 Good luck :)

haha ok- no worries

Oh yes! Forgot about that. Yeah I hate circle geo with a passion too

Was that chem a state rank? Iirc all 97's this year were ranks but I could be wrong. Congrats either way on amazing results !!!

The breakfast is something different- not everyone with 98+ got invited. I know quite a lot of .95'ers that didn't (though we all got invites to an afternoon tea). Its possible that the breakfast is within some specific faculty, or for some other scholarship (maybe Merit scholarship idk)...

It depends on YOU personally. If you can learn without writing notes (I.e. reading others), it saves heaps of time. I never wrote notes for any subject (bar compiling stats for Eco) and the other top end people in phys/chem at my school didn't either (we used a few sets of state rank notes) and...

re: HSC Chemistry Marathon Archive Yeah though the other ones are probs easier. SLC conditions- 25 degrees C, 100kPa and also 1 molar solutions. See HSC 2006 Q19

re: HSC Chemistry Marathon Archive Yeah lol- soz about that. I'm impressed you got the SLC conditions in the end though :)

3U- Inverse trig, then simple harmonic motion 4U- circular motion, then volumes

re: HSC Chemistry Marathon Archive Yeah they are correct answers but in my question, I said to assume stuff was pure to stop these sort of responses haha. Obviously in the HSC you could write that, I just wanted to see if people knew the exact conditions standard potentials were created under...

re: HSC Chemistry Marathon Archive Yes true. And her other point as well about corrosion on the lab equipment -> sorry Egg...

re: HSC Chemistry Marathon Archive Yeah these are valid answers I guess. I was looking for something different (along the lines of Immortalp00n's last point) so I'll change the question a bit: - Under what conditions was the table of standard potentials developed?

Nope