Module 3 questions (1 Viewer)

[Wohzazz]

Originally posted by kimmeh
ahah your key word was read. not answer questions yeah i said that too. i wanted a head start.. but mehh.. couldnt be bothered

i thought you were an oldie, ie. 2004er+ plus considering your post count
yes i just read, then answer question, then get angry because i don't get it, then look at answers, then read

 

[Xayma]

Originally posted by Wohzazz
1. Why does oxalic acid written as (H2C2O4.2H2O)? Why isn't hydrochloric acid written like that?

It is written like that because thats what it is before it is dissolved in water. When it dissolves the water breaks off and becomes more water. When working out how much you have to make a Molar solution etc, you must take into consideration the water molecules.

 

[kimmeh]

Originally posted by Wohzazz
i thought you were an oldie, ie. 2004er+ plus considering your post count
yes i just read, then answer question, then get angry because i don't get it, then look at answers, then read

what do you mean by oldie? i'm an 04er i just posted alot and was part of the "03ers" but yeah.. i'm an 04er ahhh so answering them in your brain?

 

[Xayma]

Originally posted by Wohzazz
hmm don't really get it, you can always draw O3 in a straight line

Umm in a lewis dot diagram how? You have one electron from each sharing with one electron from each other. You couldn't represent it in a straight line because the first and last Oxygen wouldnt be able to be sharing it.

 

[Wohzazz]

Originally posted by kimmeh
:uhhuh: this was kind of in prelim stuff so much for reading ahead.. looks like you've left a fair bit out

i'm a flawed person, i keep forgetting old stuff...plus i don't remember octet rule, thought they called it 'elements will tend to under reactions to achieve noble gas config' with no mention of this jargon
well as for reading ahead, i just want to get the main idea, then i'll start mending the holes

Originally posted by abdooooo!!!
tempted... you want to so badly... like they ask you a question on the haber process... you think they want something hardcore but the marking guideline just wants you to the know the most basic thing, like its: exothermic, 1 mark, its in a equilibrium, 1mark, mole on one side outweighs the other, 1mark... etc. as i said no need to understand.

well i could know it but not include it in the answer..i 'm not going to rip myself off..well at least not try to

 

[Wohzazz]

Originally posted by kimmeh
what do you mean by oldie? i'm an 04er i just posted alot and was part of the "03ers" but yeah.. i'm an 04er ahhh so answering them in your brain?

just not a more older person, sorry i assumed it from your post you gotta be at least yr 12 last year
not, i'm tempted to answer with a pen because i can check the answers on the context 2 cd right in front of me...it helps absorb the info

 

[abdooooo!!!]

Originally posted by Wohzazz

well i could know it but not include it in the answer..i 'm not going to rip myself off..well at least not try to

its easier said than done mate. when you know it, you'll write it... naturally, and forget about the basics which they will be looking for.

 

[Wohzazz]

Originally posted by Xayma
Umm in a lewis dot diagram how? You have one electron from each sharing with one electron from each other. You couldn't represent it in a straight line because the first and last Oxygen wouldnt be able to be sharing it.

actually i think you have a double covalent bond and a coordinate covalent bond....and i kinda get your idea now, but can a single electron be drawn by itself (unpaired) in Lewis dot diagram?

 

[Xayma]

Originally posted by Wohzazz
but can a single electron be drawn by itself (unpaired) in Lewis dot diagram?

Not normally, but if you were to draw an Hydroxide radical I suppose you could. But normally you wouldnt.

 

[Wohzazz]

Originally posted by abdooooo!!!
its easier said than done mate. when you know it, you'll write it... naturally, and forget about the basics which they will be looking for.

so you're saying if a chemistry professor were to do the HSC course without reading the syllabus, he'll probably not do well?
hahah....if it is, the system's seriously flawed

 

[Wohzazz]

Originally posted by Xayma
Not normally, but if you were to draw an Hydroxide radical I suppose you could. But normally you wouldnt.

that explains why i could draw it, i hard 2 electron unpaired, and it worked perfectly, thanks i really needed to know that
*remembers all the questions associated with Lewis dot diagrams done wrong in the past*

 

[abdooooo!!!]

Originally posted by Wohzazz
so you're saying if a chemistry professor were to do the HSC course without reading the syllabus, he'll probably not do well?
hahah....if it is, the system's seriously flawed

Phenol... the chem olympiad gold medalist... he came 20 something in the world in uni type chemistry, and he ended up with 91 for hsc chem.

 

[Wohzazz]

yeah i've heard about him, he's a pro...did he go JR?
but if its only knowing a little more than the syllabus, don't think it will hurt
like why do gas's solubility decrease with increasing temps, i'm not going to explain the inner workings of the atom and the theory of thermal dynamics, it will just be knowledge at the back of my mind. and i'll remember this fact forever as i know why

 

[abdooooo!!!]

Originally posted by Wohzazz
yeah i've heard about him, he's a pro...did he go JR?
but if its only knowing a little more than the syllabus, don't think it will hurt
like why do gas's solubility decrease with increasing temps, i'm not going to explain the inner workings of the atom and the theory of thermal dynamics, it will just be knowledge at the back of my mind. and i'll remember this fact forever as i know why

he went to SBHS.

umm JR... they've got someone the olympiad team every year in all the science and math.

yeah you can do well... if you can control the need to explain why and bullshit good.

the dude from JR who is a biology gold medalist came first in hsc chem and phy... now thats bullshitting skills.

 

[Wohzazz]

yeah i saw that in newspapers, my parents are like look at him! he topped two subjects..yeah bullshitting skills plus adequate 'understading' (don't think i'm misusing the word here)

 

[abdooooo!!!]

Originally posted by Wohzazz
yeah i saw that in newspapers, my parents are like look at him! he topped two subjects..yeah bullshitting skills plus adequate 'understading' (don't think i'm misusing the word here)

nah his good at bio... why didn't he top bio then?

edit: infact he came 7th in the world in biology... thats crazy.

 

[Xayma]

Originally posted by Wohzazz
3. Why does SO2 have a double covalent bond and a coordinate bond rather than two single covalent bonds?

The two oxygen atoms arent linked, so it needs to form like that, hard to explain but its so all atoms satisfy the octet rule without the oxygen atoms share electrons.

 

[Xayma]

*Now waits for Phenol to come in and correct everything I did wrong.

 

[Wohzazz]

well maybe he didn't write the stuff the markers needed, despite that he would of got 95+ for biology,getting 98+ just requires some luck and knowing what to write in and mention amongst his vast knowledge

 

[Wohzazz]

Originally posted by Xayma
The two oxygen atoms arent linked, so it needs to form like that, hard to explain but its so all atoms satisfy the octet rule without the oxygen atoms share electrons.

i was thinking because ozone is formed from O2 and O then, O2 is already linked by double bond so the third O in O3 will be linked by coordinate bond.....make sense?....something to do with the order of reaction..but that will complicate matter with unfamiliar molecules