Post by: Mao on April 14, 2009, 10:51:40 pm
[also, this thread will be locked until I finished scanning stuff so all the uploads are in one place :)]
Watch this space.
Acknowledgment to chem teacher at old school, nicholasysc, and other sources. :)
UNIT 3 EXAMS
Post by: Mao on April 18, 2009, 11:16:20 am
If I ever get around to it, I'll make a better version of the suggested solutions.
Post by: Mao on April 30, 2009, 01:40:57 pm
Post by: Mao on April 30, 2009, 01:42:56 pm
Post by: Mao on April 30, 2009, 02:47:58 pm
also, calling for anyone who has '08 U3 Insight and CSE exams in electronic form, and solutions to both of these. I have the exams in low-quality hard-copy [badly photocopied...], and no solutions. PM would be appriciated :) [in exchange... a lot of goodies]
Post by: Mao on May 01, 2009, 12:13:38 pm
(2009 stuff coming coon)
Post by: Mao on May 24, 2009, 01:34:49 pm
Post by: Mao on May 24, 2009, 01:36:23 pm
Post by: Mao on May 24, 2009, 01:59:59 pm
That's all I can get now, other people feel free to contribute :) [thread unlocked]
Post by: TrueTears on May 24, 2009, 02:17:18 pm
Here is one with solutions attached.
Post by: rhjc.1991 on May 24, 2009, 07:14:34 pm
Post by: kat148 on May 27, 2009, 07:39:43 pm
Post by: TrueTears on May 27, 2009, 09:31:06 pm
Post by: StringFever on May 31, 2009, 10:41:40 am
Post by: kat148 on May 31, 2009, 07:25:17 pm
Hey Kat, do you have any solutions for the exams you uploaded?
oops sorry, I should've mentioned the solutions were already included for both files :)
Post by: StringFever on June 01, 2009, 07:40:36 pm
Thanks Kat :)
Post by: mk.billabong on June 02, 2009, 07:13:39 pm
Post by: Dark Horse on June 02, 2009, 07:28:26 pm
Post by: StringFever on June 02, 2009, 11:04:36 pm
Post by: TrueTears on June 04, 2009, 11:38:02 pm
Post by: arthurk on June 05, 2009, 09:01:25 pm
can someone explain why in NH3 the oxidation number of N is -1/3 i swear it was just -3 or maybe im just retarded
Post by: TrueTears on June 05, 2009, 09:08:42 pm
Post by: arthurk on June 05, 2009, 09:10:47 pm
Post by: arthurk on June 05, 2009, 09:12:57 pm
AAS does UV light?
Post by: TrueTears on June 05, 2009, 09:19:12 pm
same exam multi choice 11Yes AAS is based on the idea that metal ions will emit the same wavelength of light as they absorb. Some metal ions will emit UV radiation as well (considering enough energy was added so the electron jump is really 'big', ie to a really high energy level, hence it releases more energy when it falls back down to its ground state), as a result you can shoot use UV radiation for that certain sample of metal ion for AAS.
AAS does UV light?
Post by: arthurk on June 05, 2009, 09:23:41 pm
hmmm interesting
Post by: TrueTears on June 05, 2009, 09:26:47 pm
so due to the fact that ions emit uv light we can say that AAS is based the absorption of visible and UV lightYes because AAS is based on the fact that metal ions will absorb the same amount of energy needed to promote an electron to a higher energy level. Therefore if some metal ions can release UV light, it means they will also absorb it. But obviously you must shoot the exact wavelength of light required.
hmmm interesting
Post by: arthurk on June 05, 2009, 09:30:03 pm
that explains or 48 in SLA haha
Is it possible to shoot UV light through AAS set up? UV Cathode lamp ftw?
Post by: aronno on June 06, 2009, 01:54:40 pm
Post by: hyperblade01 on June 06, 2009, 02:17:21 pm
hey mao do you have CSE 2009 exam?
Here ya go. If you print it out, it's suppose to ressemble a booklet so yea :p
Post by: maine on June 07, 2009, 11:30:07 am
Post by: Mao on June 07, 2009, 12:01:54 pm
The TSFX one has me close to tearsTSFX is notorious for being retarded
Post by: kurrymuncher on June 07, 2009, 12:02:58 pm
The TSFX one has me close to tears
yeah, same here
Post by: Gloamglozer on June 07, 2009, 12:12:22 pm
The TSFX one has me close to tearsTSFX is notorious for being retarded
Ditto. I felt like the most retarded Chem student that ever walked this planet when I did their exams for the first time.
Post by: monokekie on June 07, 2009, 12:22:10 pm
The TSFX one has me close to tearsTSFX is notorious for being retarded
Ditto. I felt like the most retarded Chem student that ever walked this planet when I did their exams for the first time.
Post by: methodsboy on June 07, 2009, 01:43:38 pm
Post by: kenny17 on June 07, 2009, 05:23:19 pm
Post by: kenny17 on June 07, 2009, 05:28:25 pm
exam in english! they have the most retarded working out.
im fine with the K+ bit. just the ppm bit is confusing.
is that bit of the answers correct?
thanx
Post by: d0minicz on June 07, 2009, 06:04:09 pm
soo basically they got the mass of K+ ions and thats in 25L
25L = 25,000 mL
1mL = 1g
soo thats the mass of K+ ions in 25,000 g
since ppm is 10^6 g
how many times does 25,000 go into 10^6 g
thats 40
soo u times the mass of K+ ions by 40
to get the mass per 10^6 g
which is ppm
Post by: arthurk on June 07, 2009, 07:07:53 pm
maybe im tired and cant think or something but doesnt the use of the phenolphthalein indicator result in an underestimation as the colour would change too early
Post by: arthurk on June 07, 2009, 07:11:49 pm
but then i put their last line of calculation in calculator and i get my answer
whats up with that?
Post by: mystikal on June 07, 2009, 07:25:44 pm
Post by: arthurk on June 07, 2009, 07:31:00 pm
looking in your direction Mao and Truetears:P
Post by: chem-nerd on June 07, 2009, 07:44:21 pm
Post by: arthurk on June 07, 2009, 07:51:51 pm
and for the combustion of biodiesel how come the molecular formula for the biodiesel contradicts with the formula of that was produced in the question before that unless what we are 'combusting' is the fatty acid
Post by: chem-nerd on June 07, 2009, 08:18:48 pm
it's just your typical TSFX error
Post by: arthurk on June 07, 2009, 08:33:24 pm
Post by: TrueTears on June 07, 2009, 08:34:01 pm
I laughed when they said N init's just your typical TSFX error
Post by: arthurk on June 07, 2009, 08:50:47 pm
Post by: Dark Horse on June 08, 2009, 08:10:02 am
Yeah, TSFX exams are thought provokingand hard, but I reckon Neap and Insight have a question style which is similar to VCAA
Post by: Dark Horse on June 08, 2009, 08:16:13 am
Post by: NandSfan on June 08, 2009, 09:57:50 am
Post by: Dark Horse on June 08, 2009, 11:37:38 am
Post by: d0minicz on June 08, 2009, 12:05:53 pm
Post by: arthurk on June 08, 2009, 12:12:22 pm
it provided much lolz
Post by: d0minicz on June 08, 2009, 12:25:25 pm
Post by: maine on June 08, 2009, 02:43:27 pm
Post by: vexx on May 06, 2010, 09:41:26 pm
Post by: naved_s9994 on May 06, 2010, 10:03:16 pm
Post by: stonecold on May 06, 2010, 11:15:12 pm
Post by: Martoman on May 07, 2010, 07:58:08 pm
Post by: poohead on May 07, 2010, 08:30:57 pm
thanks for the upload :)
Post by: humadeee on June 01, 2010, 01:48:02 am
Post by: poohead on June 01, 2010, 12:15:18 pm