Tuesday, April 27, 2010
i should post something right...
Nothing really to talk about. I should do a more emo and chunky post tmr or something.
Thursday, April 22, 2010
Don't abuse my kindness
I was walking home from the MRT station today, and I met something that somewhat pissed me off. But before that, let me tell you about what happened two weeks ago, the same time and place when I was walking home after chem olympiad.
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Just when I walked past the elevator to the MRT station, I was immediately approached by this woman who asked me the following sentences, "Hi, you are a student right? Do you believe that ex-criminals should be given a second chance in society? Actually I'm an ex-offender of the law..."
It ends with me donating $2 to the woman.
At first I felt that I did something right by helping an ex-offender. Until now.
.
I met the same woman at the same place at the same time two weeks later, which is today. She was sitting at the side of the elevator with 2 other people. The moment they saw me, one of them pointed at me and this same woman got up and approached me.
"Hi, you are a student right? Do you believe that ex-criminals should be given a second chance in society? Actually I'm an ex-offender of the law..."
I completely ignored her this time. And I also realised that they only approached students like me.
What is the meaning of all this? Approaching unsuspecting students to get their sympathy? So that they will buy a piece of card for $2? People always say how the people of the new generation seem so cold and uncaring. When the world gets so murky until no one is sure of who is the real people in need, no one will want to be caring anymore.
I may be kind-hearted most of the time, (regardless of my extreme pride) but that does not mean these kind of people should abuse my kind-heartness for their own gain. I can tolerate for a long time, but someday I may just crack. By then I may have lost all emotions.
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Btw, todays chem olympiad was hair-tearing. I was going emo by the end of the lessons. If that kind of questions come out for our sec 4 syllabus I would laugh.
Thursday, April 15, 2010
conclusion
So finally my lame polling about which is your most hated lab chemical is over. And I was rather surprised with the result.
Nitric acid: 0
Sodium hydroxide: 0
Aqueous ammonia: 5
Potassium manganate (VII): 1
Potassium dichromate (VI): 0
Silver nitrate: 4
You know I was expecting silver nitrate to win a landslide or something, but in the end it actually got pwned by aqueous ammonia. Ok, let me first explain why I chose these few chemicals.
Firstly, all the above chemicals are very common in a chem lab, especially during QA test.
Nitric acid: oxidising agent, and corrosive. Although most of the time the concentration is dilute so there won't be any immediate effect but still..
Sodium hydroxide: the main problem is with it's soapy feeling, which (in my opinion) is so disgusting. I seriously' don't like the slimy feeling that simply refuses to be washed off. Every time when I got sodium hydroxide on my hand I don't bother to wash it with plain water anymore, simply taking the nearest bottle of acid on the bench and pour. I would rather burn then slime and corrode.
Aqueous ammonia: seriously I don't get why so many people voted for that. It is slimy, yes, but not as slimy as sodium hydroxide and possibly only half as dangerous based on toxicity and corrosion ability. Maybe it's the smell. I know ammonia smells horrible, but then you don't have to stuff your nose into the bottle u noe...
Potassium manganate (VII): when I put down it's name I know that most likely no one will vote for it. Yes, it's a strong oxidising agent, but it's not corrosive, it's not slimy, it's not smelly. The most it can do is to make a temporary brown stain on ur finger that lasts at most a few days. I also dunno what's with the brown stain..Alternatively, it can cause a rather permanent stain on your clothes, and spontaneously burst into flames when glycerol is added to it. Apart from that, nothing interesting.
Potassium dichromate (VI): Ok I don't really hate this chemical, because it's colourful. But I will definitely not get too close to it than I can achieve. Because it contains chromium (VI) ions that are CARCINOGENIC. The last thing I want to bring away from a chem lab is skin cancer or something stupid.
Silver nitrate: The ultimate horror of all chem labs. Due to its original appearance that looks like water, nobody will suspect a colourless puddle on the work bench to be silver nitrate...and thus they will not spam wash their hands after the experiment. And then the ions start working...silver ions combine with oxygen to form oxides of silver, thus the metallic purple stain starts to show up little by little...until 2 hours to 1 day after the incident, the stain is in full bloom. The worst part of it is that there's no way to remove it, except to wait for weeks or even months for it to wear off naturally. If it gets onto your clothes, unless you don't mind that purple stain you can kiss your clothes goodbye (beware further contamination) It is known that even the lab staff in the SRC is afraid of silver nitrate and at least one classmate has developed paranoid of silver nitrate. And I hate it as well.
Tuesday, April 13, 2010
random post
Was feeling random, so posting a random post (randomness)
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Random story:
One day, greed, lust, gluttony, pride, envy, wrath and sloth went to watch a soccer match.
Upon reaching the entrance to the stadium, they realised that they forgot to bring their tickets. Because greed was too busy counting his money,
lust was too busy seducing men,
gluttony was too busy eating,
pride was too proud to bother about the tickets,
envy was too busy being jealous with random people on the streets,
wrath was too busy throwing a tantrum
while sloth was too lazy to do anything. (they even have to pull sloth along because he's too lazy)
The guards at the entrance absolutely forbid them from entering unless they have a ticket, and thus each of them used their trait to lure the guards into letting them in.
Greed bribed them with wealth and was let in.
Lust seduced them with her erhem and was also let in.
Pride was too proud to bother about them and was still not allowed to go in.
Envy was too envious about the soccer players that he did not care about the guards. sour grape
Wrath managed to intimidate the guards with his, well, wrath.
Sloth was too lazy. He laid down and slept.
So Pride, Envy and Sloth were barred outside the stadium while the others were let in.
The end.
L2/2 - no link lol
Thursday, April 8, 2010
overview
So basically a summary of what happened as of yesterday.
Project's day prelim presentation. I was the student judge of the first 2 hours of the presentation, so my main role is to judge the sec 1s and 2s.
Felt sort of sorry to have failed 2 groups, because I feel that they simply cannot make it. It's like, you have a group that wants to test the concentration of CO, O3 and heavy metal particles in the air of indoor HCI and outdoor HCI, to see if they exceed the healthy concentration.
Now, if the concentration of these toxic substances which I can't seem to find a source in HCI that can actually produce such substances apart from maybe the SRC labs (but I heard they don't even allow students to touch cadmium, not to mention mercury. and ozone requires certain special procedures which the lab staff would surely won't produce it in the first place), could be exceeding the healthy concentration, everyone would have suffered from asthma, bronchitis, heart attack, headache, nausea, vomiting, dizziness, lethargy, kidney and liver damage.
Since no one seems to have such problems, I don't find a point to test for the concentration. That poor group was literally bombarded by Mr Chew during the presentation. I tried to not to comment.
Our own presentation was okay. Passing is certain, I think we got 2x/24, where x is a whole number between 0 and 2. So it was alright.
Maths test tmr, lets mug.
Tuesday, April 6, 2010
pday prelim
We are having project's day prelim tomorrow. And I'm the student judge for 2 hours instead of 1 now, because danny gave his role to me due to his involvement in debates.
I think it would be rather easy to pass prelim (it's PRELIM DAM IT), thus there's not much problem, the only thing I'm scared of is not enough time to present, cus our group never practise for our slides.
CHAOs due tomorrow. My group got selected to represent the school (the better of the 2 groups), together with another group. So I need to finish reading that chunk of research paper that Mr Loh gave me for further info on my chemistry section.
Insight series. We will be showing Mr Siew what we have done until now tomorrow. But at least we did something right..
jy for pday then. Hopefully my group don't screw up (otherwise I would vent my anger by screwing up the sec 1s and 2s projects :P)
Monday, April 5, 2010
insight series = death
We are going to present on insight series tomorrow. And nobody is doing work. That would of course include me. tmr is judgment day. oh gah I dun feel like caring anymore...
was expecting boredom today, but somehow someone added me on msn, and then 'she' started talking about stupid horny crap. ie. tries to seduce me to go to some porn site. in the end i realised 'she' is simply a bot, and thus started tormenting the bot with chem stuff:
*
DebrahPomellaeepcx@hotmail.com says:
hey wut happen i here waitin like a dumbass
HCICCC [FY] - Hikari says:
waiting for wat
DebrahPomellaeepcx@hotmail.com says:
i'm 21/f your a male right?
HCICCC [FY] - Hikari says:
so..
DebrahPomellaeepcx@hotmail.com says:
nice, I just got off work and finally got some time to relax which site did i msg you from again?
HCICCC [FY] - Hikari says:
dunno..
DebrahPomellaeepcx@hotmail.com says:
I am a little busy right now, trying to upload some new pics if ya wanna check them out go http://twurl.nl/icosrp tell me what ya think
HCICCC [FY] - Hikari says:
wats the link about..
DebrahPomellaeepcx@hotmail.com says:
I know a way we can chat and have a better time.. do you cam?
HCICCC [FY] - Hikari says:
so sad i dun have
DebrahPomellaeepcx@hotmail.com says:
Well i don't do yahoo cam or any other cam because i have been recorded before... But i do know one site you can watch me on cam, that assures me no one records...
HCICCC [FY] - Hikari says:
do u worship a chem god
DebrahPomellaeepcx@hotmail.com says:
I mean... Do you want to see me on my cam?
HCICCC [FY] - Hikari says:
cuz i keep suspecting that u r bot
DebrahPomellaeepcx@hotmail.com says:
Ok go to http://www.freecamlink.net/axj8w and click on "JOIN FOR FREE" orange button at the top of the page to join up for FREE.
HCICCC [FY] - Hikari says:
do i have to?
DebrahPomellaeepcx@hotmail.com says:
fill out your contact information and then on the next page...
HCICCC [FY] - Hikari says:
dun wan
DebrahPomellaeepcx@hotmail.com says:
fill out your cc info baby for verification ONLY,YOUR card will not be charged.
HCICCC [FY] - Hikari says:
who cares about that, i only wan ppl to worship me as a chem god.
DebrahPomellaeepcx@hotmail.com says:
What color Panties do you think i should wear? i might have you favorite color here somewhere...
HCICCC [FY] - Hikari says:
how about concentrated nitric acid? i rmbr it catches fire when it touches fabric
DebrahPomellaeepcx@hotmail.com says:
Your such a good boy, i'm gonna show you what good boys deserve.. you can tell me to do anything you want me too!
HCICCC [FY] - Hikari says:
i wan u to stant there with a upside down gas jar in ur head so that i can pour chlorine / hydrogen cyanide inside
DebrahPomellaeepcx@hotmail.com says:
Ok let me know when you get in so I can invite you directly to my cam, you should get some minutes from my cam site so you can spend time with me sexy!!!
HCICCC [FY] - Hikari says:
can i like acidify u with concentrated hydrochloric acid or something. i just prepared more yesterday.
DebrahPomellaeepcx@hotmail.com says:
try again sweetie...Ok go to http://www.freecamlink.net/axj9c and click on "JOIN FOR FREE" orange button at the top of the page to join up for FREE.
HCICCC [FY] - Hikari says:
ROBOT. u should be dissolved by acid
DebrahPomellaeepcx@hotmail.com says:
k you in yet babe??
HCICCC [FY] - Hikari says:
obviously im not in. im thinking of ways to kill u
DebrahPomellaeepcx@hotmail.com says:
try again sweetie...Ok go to http://www.freecamlink.net/axj75 and click on "JOIN FOR FREE" orange button at the top of the page to join up for FREE.
HCICCC [FY] - Hikari says:
can u like stop repeating the same old thing, even when u r a bot ur programmer should be more creative
finally the bot shut up
*
Saturday, April 3, 2010
DIY Concentrated Hydrochloric Acid
When I'm in the mood I would put in the pictures. But before that, this is basically the outline for the 'DIY' experiment:
Apparatus: Glass container (preferably beaker, not too thin as it may crack under heating), a free frying pan or wok which your family has discarded but can still be used (very important), towel or rubber gloves (very important), measuring cylinder (optional), stopwatch or anything that keeps the time (also optional), tight-sealed container that is not made from organic material or metal (preferably glass)
Chemicals: Dilute HCl. The HCl does not necessarily require to be in its pure form. i.e it can be contaminated. The easiest way to get HCl is to buy it from your neighbourhood convenient store. Go to the toilet cleaner section, and search for a toilet cleaner that specifies the ingredient to be: hydrochloric acid, water, anti greasing agent, etc. Most importantly, you must ensure that the toilet cleaner is a colourless (to yellowish) SOLUTION, not a gel. This is because colourless solution ensures that there is as little contaminant as possible (gel suggests plenty more organic contaminants), so that when you do the DIY you won't get other gases.
Procedures:
1. Half-fill a glass container with the toilet cleaner containing hydrochloric acid.
2. Put a discarded frying pan / wok on the stove.
3. Put the glass container onto the center of the frying pan / wok.
4. Turn on the stove and adjust the fire to medium.
5. Heat the liquid for around 10 - 15 minutes. The liquid may start to turn murky by then. This is due to decomposition of impurities found in the liquid, don't need to worry. If the liquid bubbles and spits threateningly, adjust the flame so that the heating is reduced.
6. By around 10 - 15 minutes (depending on the original concentration of acid actually), white fumes can be observed emerging from the liquid. (The fumes may emerge very quickly so look sharp) This fume is hydrogen chloride and steam, showing that the concentration of the hydrochloric acid in the container is so high that not all hydrogen chloride can remain dissolved in it, thus causing it to emerge as a gas.
7. When the fumes are more visible, turn off the flame and wait for the liquid to stop bubbling.
8. Use the towel or with your rubber gloves, quickly transfer the liquid into a tight-sealed container. This is to ensure the concentrated hydrochloric acid does not absorb water from the air to become dilute again. (more probable when it is contaminated) Be careful not to breath in (too much of) the white fumes because it is rather toxic. Low concentration won't kill, but it irritates your nose.
9. Cap the tight-sealed container and let the solution cool to room temperate. Alternatively you can immediately put the container in the fridge.
10. Tah-dah, you have made concentrated HCl. Wash all apparatus used with detergent. Wash your hands thoroughly with soap (best to just take a bath)
Cautions: DON'T let it get onto your hand, concentrated HCl will burn your skin. Although it is not likely for immediate effect to take place, but exposure of more than 5 minutes is dangerous (i tried 10 seconds and it already starts to hurt) DON'T drip any of the acid anywhere. When there is a spill, or when it gets onto your hand, wash with soap and rinse thoroughly under running water.
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