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Nice, thanks man :). (our school does Industrial as well, apparently due to it being so relatable (is that a word) to Acidic Environment) I stuffed some tasks up though :/. And I don't the great discipline to study for subjects other than maths, so these marathons will help me loads.

re: HSC Chemistry Marathon Archive Seems correct to me, nice work :) As we increase temperature, our equilibrium constant value increases. Remember that pH+pOH = 14 only is true for 25 degrees celsius If we increase temperature, due to the various reasons mentioned above, we can arrive at...

Nice, nice. Nah I don't go tutoring for anything and I want to remain so. I want to see if I can get a 99 ATAR without tutoring. And can you check if bleakarcher's answer is absolutely correct? It seems correct to me, because he mentioned how we can shift equilibrium to left and etc. but I...

Of course haha. You are tutoring chem at the moment yeah?

Someone is very close to the answer, he just needs to explain it correctly.

re: HSC Chemistry Marathon Archive Bingo, now explain mathematically and with words what exactly happens when temperature increases. It doesn't exactly favour the hydronium ions more, that was just a silly mistake by me (I am pretty sure)

Some people don't like it when I post questions like this hehe, I should of left it for later.

re: HSC Chemistry Marathon Archive Related to that as well, yes. We are looking at pure water here How could the conditions favour the Hydronium ions more?

re: HSC Chemistry Marathon Archive Correct. Now its your turn to post a question (or anyone else can)

Knowledge of basic log properties is all that is needed and your head, no actual hard calculation.

re: HSC Chemistry Marathon Archive Yeah, I'll post from Module 1 moreso then next time when I need to ask a question.

re: HSC Chemistry Marathon Archive They are both within syllabus standards not sure what you mean by HSC level.

re: HSC Chemistry Marathon Archive Fixed. But as far as I know it is impossible for there to be those numerical percentages and it meaning mol%, the Carbon - Hydrogen ratio is too high for it to be mol.

First sentence is correct, second is not. Think about what pH7 means mathematically, I would say more but I think I gave enough hints already

Not quite hehe, you are correct in it has to do with self-ionisation but you have to explain it properly in why we can have ph6 neutral water. It would help to think mathematically here.

hehehe

re: HSC Chemistry Marathon Archive I would tell you why this is not the case, but it would give the answer away haha. EDIT: I didn't want to kill the thread this early, here is another question in the mean time while people think about it Upon analysis of mass of a hydrocarbon was found to...

Related to it yes, but make sure to explain exactly how this is possible (as in what conditions etc), and WHY as well. Why is very important

re: HSC Chemistry Marathon Archive HCl \rightarrow H^+ + Cl^- n(HCl) = CV = 0.1 \cdot 0.005 = 0.0005 \ mol There is a one to one ratio between HCl and H+ Hence n(H^+)= 0.0005 \therefore [H^+]= \frac{0.0005}{0.105} =0.0047... We get 0.105 from the Volume of the soln which...

Yep there was a mistake, in the denominator it is supposed to be: 4\sin^2 \phi /2 not cos :s The integral then falls out as: \sum_{k=1}^{n}k^{-1} \sin k\theta = \int_{\pi}^{\phi} \frac{\cos \phi -1}{4\sin^2 \phi /2} + I_n - I_{n+1} Where the I_n is same as before but sin at the bottom...