Recent content by stevenwong86

Yeah I got that letter too, it probably just a letter to confirm your application. I didnt see any mention of interview or anything like that anywhere, so I was under the impression that uai and application were the only two determining factors. I maybe wrong though =P

How do you know it didnt count towards your UAI?

well then i'd be a millionaire cos my school didnt teach me half of what was in the exam haha

yeah, but in both cells, oxidation still occurs at the anode and reduction at the cathode. and for the oxidation, I used the: 2OH- -> 1/2O2 + H2O +2e- added 2H+ to both sides to get: H2O -> 1/2O2 + 2H+ + 2e-

I wrote it was good, but it could have been improved by: -collecting more samples -using a graph and line of best fit instead of taking the average

yeah I put yellow with silver, I think thats right (its right in the macquarie revision guide anyway :P)

argh, dont tell me I got that simple question wrong! :( I thought that the oxidation potential of water was -0.4, whole the oxidation potential of Br- was -1.08. So since the water had a higher ox. potential, it would oxidise first. What did everybody else get?

I put (C) I found the molecular mass of propanol, then the moles of propanol burnt, then the heat given off. Then just plug the numbers into q=mct to find t.

Probably high 80's. I know I've lost 4 marks so far, and I'll probably lose more from those extended response questions.

For the electrolytic cell, i put the oxidation and reduction of water.

isnt it D? Because the one on the negative electrode is the one where electrons are being released, which is oxidation. So I figured that the one on the negative electrode oxidised more easily. And it said in "increasing" order. So the least was on the left. Can somebody smart and good...

Yeah I wrote the top ship was on land. I'm also glad that there werent any stupid restoration questions, as I didnt know anything about them. Too bad I didnt get to mention sporovibrio desulfuricans :)

For the counter weight question, I put the tension as 3 times the weight force of the coutnerweight. I figured that because there are 2 pulleys, the mechanical advantage must be 3. Can somebody confirm this?

yeah, I guessed A as well, and my friends who did electronics said it was right, cos the pointed thing in the end means OR.

Yeah, I thought it was a pretty easy exam as well, not really any surprises. I didnt do that well though, because I didnt revise a few things properly, like heat treatments and materials testing, so I forgot what they were. As usual, there were a few common sense questions and calculations...