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Yeh i think i nailed this section. I did Vernon anchors and HMB Endeavour Cannons. Drew diagrams of electrolysis to go with it.

Yeh i did bud. Moles of Sodium Carbonate: 0.05 = Moles/0.02345 Therefore 2.345 x 10^-3 moles of HCL (Multiplying above answer by 2) Molarity of HCL = (2.345 x 10^-3)/0.025 = 0.0938Mol/L

Did u keep all your numbers in your calculator, that could be the cause of a slightly off answer.

I put 1.7mg and then divided it by 4 because i thought they used 4 tablets in the sample. oh well thats 1 mark gone

Yeh it was and i had the sodium carbonate concentration at 0.05M.

ok kool, i think we got it right then:D

I got about 2643789kj and 55200L required for the hydrogen one. Im pretty sure its right, but i could be mistaken. I got 0.098mol/L for the titration one as well.

This is perfect working!

lol:haha:

The answer is B. HCL is in excess by 0.0001 moles. Therefore molarity = 0.0001/0.05 and pH = 2.7

yep thats right. i also talked about incomplete combustion and that carbon monoxide is still poisonous as it prevents oxygen binding to haemaglobin.

hmm, it said critically evaluate the statement. That seems like you just discussed how to produce it.

yep positive, i do shipwrecks

10 is B. I just recalculated it now

Uh no. Ni(s) + Cl2(g) ----> Ni2+(aq) + 2Cl-(aq) The previous one has two oxidations, which is impossible

I re-read the question in the exam and it didnt say anything about stopping the program while execution. If it did, then it would be breakpoints.

I did the exact same thing. I reckon ill get 1 mark for it since it was a poorly worded question and it was a decent attempt.

yeh, luckily i ranked first for the subject so my mark won't get affected. But yeh, heaps of people choose the subject just to play games in class.

I wrote that its a logic error and the program is stuck in an infinite loop because it is reading the same accountFile continuosly. It does not even stop when there are no more accountfiles to read. But i didnt mention the "WHILE NOT found" should be "WHILE found = False". In part iii) I did...

It's not usually that high. Mainly because most people choose the subject to bludge. 17/20 people in my class left after 1 hour of the test, so im guessing more people in the state will be like this too. So band 6 cuttoff, bout 82-84/100.