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And we all know that if your DO readings are inaccurate... unless you use a winkler titration... by evaluating BOD using standard methods you're setting yourself up to have an incorrect BOD reading... :D

Anyone know how hard it is to maintain a credit avg while doing Actuarial Studies, MATH1151 has me shit scared.

If you've been given a place in the co-op that really really annoys me that you are asking that question, because shortlisted people like myself who really really really want to do Actuarial Studies are being kept out by people like yourself who just want money. Med or Law would pay better...

According to conquering chemistry; the amount of total dissolved solids can be measured first by filtering off suspended solids then by evaporating a sample of water to dryness and weighing the solids left. I think that means it was only the stuff in the evaporating basin..

Yeah i agree but i thought thickness of wire would affect the amount of current... simply because there is less resistance and i dunno the Earth's mag field is everywhere would it really matter the most? I'm just being hopeful lol

I have a couple questions... why is Q13. a) and not C) Phosphorus... Phosphorus has more electrons in valence band so wouldn't the dopant level be higher as shown?.... Why isn't 12 B i know Planck made the hypothesis and mathematical expression but the question says 'explained'. Are you sure...

Having checked the answers with a physics teacher there are only two that are meant to be A. So all your answers are WRONG! I got fooled by the first question, yes that is meant to be A also the other A one is supposedly Planck but i said Einstein as the question said "explained" it will be...

For lead you definitely needed a confirmatory test, so i simply tested with HCl in which it forms a white ppt and confirmed with I- in which it forms a yellow ppt.

I'm quite certain it would! If it was connected via external wire it would become a galvanic cell definitely! I'd just like to point out that I have always had the same argument... NOT galvanic, formed on bottom of beaker! Nothing happens to Iron nail... Debate what you will but the...

I suggest very candidly that you go back to the VERY FIRST module you studied in HSC Chemistry and look at your syllabus and read up about Metal displacement reactions, you can then come back and i'll happily discuss this further. :)

Agreed with Dumsum!..... As Iron(II) ions from solution are being reduced, it is impossible for it to form on the Iron nail as there is no way electrons can get to the other metal! No external circuit and they are not touching!!! Besides, Magnesium strip is being eaten away, where does the...

In regards to the chemistry course if you shoot yourself in the foot by making a contradiction you will not be awarded a mark because that shows you have not achieved the desired outcome as you are not sure. In regards to this, if by the obscure chance it could be termed a galvanic cell which...

WRONG! Galvani's set up had the ends of two different metals tied together, the other ends were placed in freshly extracted frog leg muscle hence electrons could flow between them!

You are a fool, and if i were you i'd be hoping to get 50 in that exam... what Abtari said was that the Iron built up on the iron nail... this is incorrect the iron(II) ions in solution precipitate solid Iron with the electrons from oxidising magnesium and solid iron gaters on the bottom of the...

Dam. I knew it was something like that but i was subtracting 0.015 from the value we get from the titration and it was negative..... *hits head on desk* should have known the subtraction was other way around...

I agree with you but i don't believe the solid Iron would form on the nail i would say like a standard metal displacement reaction the iron ions would percipitate solid iron out of the solution which would gather in the bottom of the beaker.

I'm sure you will recall from the work of Alessandro volta and Galvani that two different metal wires joined together in an electrolyte will create a galvanic cell... there is the ability for the ions to move between the two but please, kindly explain to me how an electron would get from one to...

No! Unless i'm mistake the Iron nail would not rust... as if you put and iron nail in a solution of Iron does it rust.....? If you put an iron nail in a solution of magnesium it does not displace it either as magnesium is a stronger reductant. Am i right? Also... there is no deposit on...

You guys are tools, Q15 is obviously A - 0.15 because 0.6mol of thiosulfate equates to 0.3 mol of I2 gas which when put in equation 2 equates to the same moles of MnO(OH)2 which when put in equation 1 equates to 0.15 mol of O2 gas by mole ratios... geeze... n00bs ;)

Q b) ii. What did you guys put that happened. I put that it was like a metal displacement reaction as the Magnesium is more active than the iron(II) solution Iron would precipitate out of solution onto the bottom of the beaker and that nothing would happen with the Iron nail because magnesium...