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For chemistry, general revision works to help you remember/understand the concepts. If you already understand and memorised all of the concepts and information, then use past hsc questions to practise responses; the most important step in practising being that you check your answers against the...

What do you think would be required to get a low 99? P.S. thanks for all the advice :D

Thanks for the advice! Is there anyway to quantify like the impact of doing these things on your marks? Like did you start to achieve A's more often etc? And what the ranks be looking like if I were to obtain 98+? Prefer not to say atm :P

Thanks guys, main things that I need to bump up? besides english obv...lol P.S. what was your best method of improving your english marks?

These are only estimates of my school ranks (albeit fairly accurate): Eng Adv: ~120/167 (disgusting, yea I know :L) Mathematics: 57/113 (known) Mx1: 87/118 (known) Chem: ~2 /98 Bio: ~10/49 Phys ~40/95 School rank: ~15

Citric acid is a triprotic acid, hence would require the greatest amount of base to neutralise as the number of OH- ions in order to neutralise the three protons released would be 3, compared to the diprotic sulfuric acid (2 OH- ions) and the other two (B and D) are monoprotic. Although...

Enig meant "no" as in dont drop and "yea" as in you can still get band 5/6.

Hope this diary lasts throughout the last half of the HSC unlike others...*coughzherteccough* lol, Best of luck!

Are they a general indicator of what mark you are going to get? As in will the marker know what mark to give you with little regard to the rest of the essay? Also, will an essay with a brilliant intro but mediocre body and conclusion, be better than an essay with a mediocre intro and brilliant...

Ranks>Assessment marks. Obviously it is still possible to obtain 95+ still (assuming you destroy the externals). In terms of being rank top 20, it depends on your school rank, which gives an idea of your relative cohort. i.e. rank top 20 in ruse - probably guaranteed 97+ unless you completely...

I'm currently on 13 units and I would like to drop down to 11, but at the moment I'm in a dilemma or either dropping Physics or Legal. Pros for legal: - It's a moderately enjoyable subject with a good teacher. - I have a moderate amount of knowledge in terms of the concepts etc. Cons: - I...

re: HSC Chemistry Marathon Archive C2H5OH (l) + 3O2(g) --> 2CO2(g) + 3H20(g) 91g ethanol. therefore 91/46.068 (mm ethanol) = moles of ethanol = 1.975 moles since ethanol 1:3 with water 3x1.975 moles = 5.926 moles of water 5.926 x mm water (18 around ish) = 106.67g of water formed...

re: HSC Chemistry Marathon Archive C (acid) x V (acid) = C (base) x V (base) therefore: C (acid) x (2/1000) = 1.16 x (17.1/1000) Since H2SO4 is diprotic : 2(C (acid) x (2/1000)) = 1.16 x (17.1/1000) C (acid) = 4.96 mol/L 3 sig fig.

re: HSC Chemistry Marathon Archive Dr Soccerball, I think it'd be better for everyone here's sake if question were rather collected from past exam papers than made up on the spot. This way it gives everyone (including yourself) to experience the type of questions that are going to be presented...

re: HSC Chemistry Marathon Archive 10^(-pH) = hydronium concentration Inverse proportion no...? Or am I doing something wrong here again...

In Arrhenius's theory, he believed that an acid was a molecule that is able to ionise in an aqueous solution to produce H+ ions, while a base is a molecule that is able to dissociate to produce OH- ions. While the bronsted-lowry theory defines acid as proton donators and bases as proton...

re: HSC Chemistry Marathon Archive Edited it a bit, but overall nice work, just need to work more on how it counteracts change, and add more equations on how it neutralises bases.

re: HSC Chemistry Marathon Archive Hahaha I remember that, one of the BOSer's was like: I'm pretty sure you are going to lose marks for not mentioning it being a solvent, like he was pretty adamant on this and started to tell other people they got it wrong for not writing solvent.

re: HSC Chemistry Marathon Archive Sorry for the double post but also don't forget this point: Arrhenius also believed that H+ and OH- neutralised each other to become water, however his theory could not explain why carbonates were able to neutralise acid, producing water, even though there...

re: HSC Chemistry Marathon Archive What part of it is wrong? P.S. For some reason I feel that half the questions drscoccerball gives for acidic environment are like made up questions (by him) due to the incomplete nature of them... But Soccer if you really want to answer an Acidic...