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re: HSC Chemistry Marathon Archive Ok while you guys are thinking about that, here's another one: The measured potential difference of a galvanic cell was different to its theoretical potential difference. What could have caused this difference (assume everything is pure- like an impure liquid...

re: HSC Chemistry Marathon Archive Next question: Describe how you would coat an iron spoon with gold.

Bump for Zubin- I've been speaking with him for a while now and he knows what he's doing (obviously given his ATAR lol) and he can explain it (which is the main thing). 10/10 would bang (no homo)

Yes. A lot of the 90's papers have some very solid ideas behind them. The course has changed very minimally (tbh I didn't even know there was a difference when I did the papers- I thought the last changes to the course were in 1981 lol)

re: HSC Chemistry Marathon Archive ^I don't like that tbh. The easiest way to answer that question would be to actually DRAW cellulose, and then comment on its structure. Deal systematically with it-> like comment on what it's made up of (carbon-carbon chains etc), then go into its bonding or...

The homo is high in these posts... Haha <3 you guys And bump

Year 11- probs between 30 mins to 1 hour a night (however long it took to do homework- I didn't revise stuff or anything during term). A few days before exams, maybe 3 hours a day. Year 12- probs around 3 hours a night. During exam blocks, around 7 a night. A few weeks before trials, around 6...

Yeah that's good- I didn't go tutoring either. You're heaps good on the understanding side of things which is hectic. About the solution -> I'm not sure of the technical stuff (like whether self ionisation is exo or endothermic) but the general gist is right I think. When you guys have done...

Yep =) Do you go tutoring for anything actually? And are you aiming to go all the way with ATAR?

Yeah saw that. Though for a proper answer, don't you need knowledge of equilibrium constant? An explanation by Le Chat's falls short I think (though I could be wrong- I haven't actually thought about the question today, I just know the answer haha from seeing it before)

Nah you should have posted it- its a very good question. It was a good idea though to also post an easier question.

Nobody is anywhere near the answer in the thread haha- I would have thought at least one person would have gotten it by now (though tbh, it is very outside the box)

Chem marathon I mean

Nice question in marathon thread :) Will be interesting to see who gets it right

Yeah obviously 95-96 is an incredibly solid mark but the point was that 99.95 does not require perfection. You can make mistakes, not rape every assessment etc. You don't need to state rank in any subject to get it. You just need to be consistently very good at your subjects. Considering that...

Yeah I did in the end :) My subject marks were: Chem- 96 Eco- 97 English- 94 MX1- 99 MX2- 96 Physics- 96 I havent bumped this thread for ages because I wasnt sure how much time tutoring at centres would take but if you're still interested, pm me because I think ill have more time...

Alternatively, use the number of moles from the whole compound and that by definition is the same as the number of moles of aluminium present. What you are doing is multiplying by molecular mass and then dividing by it. And I finished HSC in 2012 too :)

Why would you tell people lower marks?

1 mole is Avogadro's number of molecules yes? So in 1 mole of alumium chloride, there are Avogadro's number of alumium chloride molecules. Likewise, in 1 mole of alumium chloride molecules, there must also be 1 mole of aluminium atoms in there and also 1 mole of chlorine atoms. Your problem is...

It should contain the same number of moles of alumium as it does aluminium chloride as it does chlorine