Recent content by wah

congrats to all who received macq offers for IB :)

Yeah, Conquering Chemistry doesn't explain which comes from which. But Surfing clearly illustrates this in the Ester chapter :) That's why it's always wise to refer to several textbooks when you do your study :) Though this -OH and H+ matter isn't really worth its controversy. I highly doubt...

This is not correct. The OH- actually comes from the -COOH bond, while the H+ originates from the -OH bond. This can be found in the Surfing Text for the Acidic Environment. :)

1. 2NaOH(aq) + Cl2O(g) ----> H2O(l) + 2NaCl + O2 - i'm assuming the reaction does take place lol 2. 360ppm = 360mg/L = 0.360g/L 0.360/(12.01 + 16.00x2) = 8.180 x 10^-3 hence conc of CO2 = 8.180 x 10^-3 mol/L 0.02ppm = 0.02 mg/L = 0.00002g/L 0.00002/(32.07 + 16.00x2) = 3.122 x 10^-7...

There are 3 methods to achieve the aim: -heating the soft drink gently such that the evaporation of the water (and other stuff) is at a minimum. This means no boiling of the soft drink. -Shake the soft drink -Use NaCl to salt it out though the first two methods are more common.

Yes. The Success One books have the solutions to all the questions in the HSC paper. And they are very useful as well :)

Titration is part of the HSC course in the topic called "The Acidic Environment". So pick up any HSC Chemistry text book and they should have a summary of the procedure :) Chemistry Olympiad - Does your school offer olympiad training? If they do, join that! If not, ask your teacher or the...

Yes

it sounds like you are more confident and believe you are going to be happier at newcastle. if you are so excited about newcastle, it seems like you've made your decision deep down? and i know what you mean by the independence lol. i'd love to move out too :) if you go to unsw, u won't get...

Anyone could easily say that they could obtain an UAI of 100 if they worked harder *rolls eyes*

No. The paper was long, though it was not extremely difficult for a 4U exam. I believe David Yang has said something that a lot of candidates would have felt about the exam. justchillin: No need to get jealous over the attention these dudes are getting from the media. Maybe if you were put on...

Sorry. I should've made it clearer - the top students of each subject published by the BOS is determined by the number of students completing the course. In courses with less than 1000 candidates enrolled, only the top 5 students would be announced and published. In the case of the course with...

Yes they do.

Your raw mark is scaled to be your HSC mark. However, this HSC mark is scaled again to generate your UAI. Hence SAM is used for scaling your HSC mark to your UAI %.

I believe 110+ is required to gain top 10 this year.