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Question 11, I'm almost 100% sure that it's actually D. pH adjustment is a late step, after all the treatment. After all, they'd want to get rid of the shit before they add other chemicals to balance the pH right? As for the rest, they seem correct. I wish someone would explain 9 to me...

Umm no, they add lime before the membrane filters. That's what my excel book says. pH adjustment is one of the later steps. +1

Ahh, thankyou! A straightforward explanation :) +1 rep

Yup about there. Also, remember that was for the 2003 exam, which many consider to be fairly easy. This exam was harder, so it may even boost you higher

I mean the very last bit after the drop. The curvature was very quick, so thats why I made the assumption.

+1 BREAD FTL. How many marks was that entire question worth? I saw it and thought.....ok, I'm gonna run out of time if I keep doing these calculation questions, SKIP! So yeah, attempted everything else to the best of my ability, time wasn't really an issue. Had about 2mins remaining, which...

WOO! I'm happy. For once, we didn't have to be English students to gain some decent marks. And just to show that I'm not an English student, I had to actually stop and figure out how to spell "English" before I typed it.. lol Good one BOS, you may have just redeemed yourself slightly. But less...

Increased temperature = increased rate of reaction (therefore reaches equilibrium quicker) Or, a cataylst was added.

I did that, which led me to use Fe > Fe2+ + 2e- It's further up than lead, so it's oxidised. .:. At Anode (pt). It's reversed, so the potential becomes 0.44V Then, that leaves Pb to be reduced. So Pb2+ + 2e- > Pb Thats reduced, so it occurs at the cathode (lead). Potential is -0.13V .:. 0.44 +...

Anode is LEFT Cathode is RIGHT Electrons flow from Anode to Cathode, or, negative to positive.

Your brother is way off.

5.4765 :D Haha unlucky. C3H5(OH)3.....It's like an E shape :) Errr lol. Looks like you messed up the 0.30, it should be 0.05. I know what you did wrong, you were meant to SUBTRACT 0.30 from 0.35. Here's the table: ..... NOTE: In brackets means subscript ................2ICl(3) >> I(2) +...

Me too! It's ok, it said Natural Resource (which includes either Cellulose or Crude Oil) I freaked out for a second there too. Yeah I did LDPE, which I believe is correct. It's low density, branched, structure makes it soft, yet tough and flexible. Perfect for a plastic bottle. Then other...

Sweet, I hope I get that. As a worst case scenario, what would a 55% acheive do you think? Yeah I aint learning experiments either (only real important ones). You can make them up on the spot really.

Haha yes. Is it possible to study the entire HSC Chem course in one day? I did it for Trials and got 60% (which is shocking, but I made stupid mistakes) Now I'm much more knowledgeable, hoping for at least 75% with this 1 day crash-course PS I love industrial. The processes are easy to...

Sweet :D I agree. You know how every year there's always 1 or 2 people who do incredible amounts of hard work, and get the top result? Last years dux (whoever gets the highest UAI) at my school had a UAI of 89. Just goes to show, there are some people who will get low results no matter how...

I think I got this too. I'd like to know the answer too :)

Paris Hilton? She's fucking rich, what the fuck did she do in life LOL

What's wrong with video games :jump:

Exactly. And at the BoS, the English examiners/teachers are able to effectively debate their side and issues and use techniques and shit to win their opponents over :P It's why English is compulsory. The maths examiners gave in.... xD Being intelligent at English is an oxymoron, because...