/sci/ - Science & Math

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Anonymous Thu Sep 9 21:32:43 2010 No.1730641 [Reply] [Original]

Alright, so my chemistry teacher took out a shoe box the other day with one hole on the top right side and another hole on the opposite side. She poured one cup of water in through the top hole, and 15 seconds later, water flowed out the other hole, but it was more than one cup. She said that there wasn't any water already inside the box. She offered us extra credit if we could recreate it, but I have no idea how it happened. Also, she poured dark blue food colored water into the hole again, and lighter blue water came out. I tried books and google, but I can't figure it out. Can anybody help me?

>>	Anonymous Thu Sep 9 21:34:43 2010 No.1730647 PURE MOTHERFUCKIN' MAGIC

>>	снайпер Thu Sep 9 21:35:43 2010 No.1730649 Open the box.

>>	Anonymous Thu Sep 9 21:36:43 2010 No.1730655 > said that there wasn't any water already inside the box Conservation of mass suggests otherwise, or that she was pumping water in from another source. > lighter blue water came out Sounds like dilution, no?

>>	Anonymous Thu Sep 9 21:37:39 2010 No.1730665 File: 2 KB, 126x97, 1284081987108.jpg [View same] [iqdb] [saucenao] [google] >>1730655

>>	Anonymous Thu Sep 9 21:40:43 2010 No.1730674 Well she won't let us see inside the box, but she firmly says that there's no water already inside. And yeah, it's dilution.

>>	Anonymous Thu Sep 9 21:41:43 2010 No.1730678 The water is hot when it comes. The density of water decreases as temperature increases, thus it the same amount of water occupies more space.

>>	Anonymous Thu Sep 9 21:43:43 2010 No.1730686 So you're saying that the water must somehow be heated from inside the box? The only thing is that it's pretty light, and I'm not sure how she would heat the water with it being so light.

>>	Anonymous Thu Sep 9 21:43:43 2010 No.1730688 Maybe she's pouring in an aqueous acid that is coming in contact with solid base, forming additional water. But 15 minutes later? I guess that water goes through some series of tubes, kinda like a internet.

>>	Samefag Thu Sep 9 21:43:43 2010 No.1730689 >>1730678 The effect of temperature (and pressure, incidentally) on liquids and solids is very low. You wouldn't notice it, I assure you. Not on the scale of a shoebox. Not at those conditions.

>>	Anonymous Thu Sep 9 21:45:43 2010 No.1730695 Well she poured the water straight from the faucet, so I don't think that it's an acid. And I wrote 15 seconds, not minutes.

>>	Anonymous Thu Sep 9 21:46:43 2010 No.1730701 I meant she poured the water into a cup straight from the faucet.

>>	Samefag Thu Sep 9 21:46:43 2010 No.1730702 >>1730688 Interesting idea. That would also explain the heat of the water, and the time needed.

>>	Anonymous Thu Sep 9 21:46:43 2010 No.1730704 >>1730695 Ok my bad. But still... PURE MOTHERFUCKIN' MAGIC

Anonymous Thu Sep 9 21:47:43 2010 No.1730706

Hmmm... Taking the "no water already inside" statement strictly would imply there is oxygen and hydrogen already in the box that is not in the form of water. Perhaps she had hydrogen peroxide in the box? Adding water causes the H2O2 to be washed over to another compartment with a MnO2 catalyst to convert it into water and oxygen.

>>	Anonymous Thu Sep 9 21:47:43 2010 No.1730711 Thermal expansion. Feel the water next time and notice its temperature. The box contains a heater.

>>	Anonymous Thu Sep 9 21:48:43 2010 No.1730712 >>1730641 Top right side? If the shoebox was oriented as it is in your picture, that would mean that both holes were in the top? Opposite side means top left side?

>>	Anonymous Thu Sep 9 21:49:43 2010 No.1730716 Sorry, I meant bottom left side.

>>	Anonymous Thu Sep 9 21:49:43 2010 No.1730718 These guys are trolling. It's not happening, unless there actually was water or another clear liquid inside the box.

>>	Anonymous Thu Sep 9 21:50:43 2010 No.1730720 File: 4 KB, 126x96, 1283995545013.jpg [View same] [iqdb] [saucenao] [google] >>1730718

>>	Anonymous Thu Sep 9 21:51:43 2010 No.1730723 >>1730718 Sorry if you think so, but it's an actual assignment for extra credit. I'm not trollin.

Samefag Thu Sep 9 21:52:43 2010 No.1730725

>>1730695
The H202 needs to be reasonably diluted to begin with, or else you're ending up with something that is potentially explosive if it accidentally sloshes onto the catalyst. "Being careful" isn't good enough for high school classroom activities - you don't bring shit like that in.

>>Inferred high school because female teacher and the nature of the demonstration, as well as the presence of extra credit. Correct me if false.

>>	Anonymous Thu Sep 9 21:53:43 2010 No.1730731 >>1730725 Haha, yeah you're right.

>>	Anonymous Thu Sep 9 21:55:43 2010 No.1730736 >>1730718 but why would it take 15 seconds? That's probably the place to start. As for another "clear" liquid, how about ethanol? As in, I'm sure there are a number of clear liquids that fit the description.

Anonymous Thu Sep 9 21:56:43 2010 No.1730740

>>1730689

He didn't give a specific volume. I picture exactly one cup of water poured into the box which has some heating mechanism. The hot water pours out into a cup and the we observe a slight increase in volume. Given that we add no additional water anywhere, thermal expansion is the only solution.

Anonymous Thu Sep 9 21:56:43 2010 No.1730741

>>1730701
She poured the water straight from the faucet into a cup containing solid acid. She poured it into the box which had a compartement containing solid base. Several moles of acid-base neutralisation and 15 seconds later, slightly warmer water with dissolved ions.

QED

>>	Anonymous Thu Sep 9 21:57:43 2010 No.1730746 >>1730736 Well, it's definitely water, we all checked.

>>	Anonymous Thu Sep 9 21:58:43 2010 No.1730750 >>1730641 >and 15 seconds later, water flowed out the other hole, but it was more than one cup. Would it be accurate then to say that >and 15 seconds later, A LIQUID flowed out the other hole

>>	Anonymous Thu Sep 9 21:59:43 2010 No.1730755 >>1730750 ya feels me?

Anonymous Thu Sep 9 21:59:43 2010 No.1730758

>>1730741
It was a clear cup, and there was nothing inside it. Maybe there was acid inside the box? By the way, she told us that once we figured it out, we should be able to recreate with simple household items. So it's not something that would require something really complex.

>>	Anonymous Thu Sep 9 21:59:43 2010 No.1730759 >>1730741 Creating acid solutions by adding water to the solute rather than vice versa is poor practice

>>	Anonymous Thu Sep 9 22:00:43 2010 No.1730760 Thermal expansion also explains the color change. Because the concentration of the dye is amount per volume, and increase in volume lowers the concentration.

>>	Anonymous Thu Sep 9 22:00:43 2010 No.1730761 File: 35 KB, 621x701, solution2.jpg [View same] [iqdb] [saucenao] [google] >>1730706 ok here's my 2nd suggestion

>>	Anonymous Thu Sep 9 22:00:43 2010 No.1730762 >>1730750 I'm positive that it was water.

>>	Anonymous Thu Sep 9 22:03:43 2010 No.1730765 >She said that there wasn't any water already inside the box. What were her EXACT words Tommy?

>>	Anonymous Thu Sep 9 22:03:43 2010 No.1730766 >>1730750 >liquid flowed out the hole xD

>>	Anonymous Thu Sep 9 22:04:43 2010 No.1730770 >>1730765 "There is no water already inside the box."

>>	Anonymous Thu Sep 9 22:06:43 2010 No.1730774 fucking ICE

Anonymous Thu Sep 9 22:09:43 2010 No.1730795

Theres some sort of tubes or similar system inside of the box, that is obvious.

There is something inside of these tubes(or w/e), which mixes with the water and dilutes it.

How did she handle the box OP? Did she always keep one side down, balanced i mean, or something similar? Because that hints at theres something else (probably a U-bend[like in toilets/sinks]).

Or theres some sort of solid inside of the box, that the water mixes with and that increases the volume.

>>	Anonymous Thu Sep 9 22:09:43 2010 No.1730796 >>1730762 How positive? Did teacher suggest you drink it?

Anonymous Thu Sep 9 22:09:43 2010 No.1730798

>>1730774
fucking ice IS water, which is why her exact words are important. Assuming she is smart enough to teach chemistry, she certainly knows that ice is water.

However, what I said here
>>1730766
is important. What if there were something LIKE ice inside, something that melted when the water flowed through it.

OR what if it were something that dissolved, and increased the volume. (Although, I don't think it really works like that. Correct me if I'm wrong, but I'm pretty sure you can dissolve quite a bit without increasing the volume, and also, inside a box, it would be hard to get even a small amount to dissolve.)

>>	Anonymous Thu Sep 9 22:10:43 2010 No.1730806 >>1730795 >using paranthesises and brackets in english liek its math

>>	Anonymous Thu Sep 9 22:11:43 2010 No.1730812 >>1730806 Got a problem with that?

>>	Anonymous Thu Sep 9 22:13:43 2010 No.1730822 >>1730806 I find it laudable. I love taking tangents (also known as circumstantial speech [which, incidentally is a symptom of schizophrenia and a trademark of Columbo]) and I think more people should use that way of typing.

Anonymous Thu Sep 9 22:14:43 2010 No.1730829

How much more liquid flowed out of the box? For the colour of the dye to change appreciably it must not be too small. BTW, thermal expansion of water cannot explain the significant change in volume. You can estimate the volume chage from this http://www.engineeringtoolbox.com/water-thermal-properties-d_162.html

>>	Anonymous Thu Sep 9 22:14:43 2010 No.1730835 >>1730806 >implying thats a problem

SAGEGOESINALLFIELDS Thu Sep 9 22:15:43 2010 No.1730836

>>1730798
Every solution has an increase in volume, no matter how small it is.
Mostly it is disregarded though because dissolving something gives only extremely small volume increases.
That being said, your teacher is a witch, OP.
Also, DAT SOLUBILITY EQUILIBRIUM

>>	Anonymous Thu Sep 9 22:16:43 2010 No.1730841 >>1730795 She kept the box normally, like in the picture. So maybe.

>>	Anonymous Thu Sep 9 22:17:43 2010 No.1730853 >>1730841 Well if she kept it balanced than one of those two (or something similar) is most likely it.

>>	Anonymous Thu Sep 9 22:18:43 2010 No.1730855 >>1730835 log4x

>>	Anonymous Thu Sep 9 22:19:43 2010 No.1730857 >>1730761 My 2nd solution does react fast enough for the liquid to come out in 15 secs. Causes the liquid to become hot. But solid NaOH is quite unlikely to be used in high schools. (but very common in university labs, you can buy 1kg containers of it)

>>	Anonymous Thu Sep 9 22:20:43 2010 No.1730860 File: 17 KB, 500x384, 1281661912185.jpg [View same] [iqdb] [saucenao] [google] >>1730855

>>	Anonymous Thu Sep 9 22:20:43 2010 No.1730861 >>1730836 what if she was somehow mixing glycerol with the water inside the box? That might result in an appreciable increase in volume.

>>	Anonymous Thu Sep 9 22:23:08 2010 No.1730867 >>1730861 triglycerides are monosaccharides that make up fatty acids, which are the building blocks of lipids in the body

Anonymous Thu Sep 9 22:25:53 2010 No.1730873 [DELETED]

>>1730867
>Glycerol is an organic compound, also called glycerin or glycerine. It is a colourless, odourless, viscous liquid that is widely used in pharmaceutical formulations. Glycerol has three hydrophilic hydroxyl groups that are responsible for its solubility in water and its hygroscopic nature. The glycerol substructure is a central component of many lipids. Glycerol is sweet-tasting and of low toxicity.

>>	Anonymous Thu Sep 9 22:26:56 2010 No.1730877 >>1730873 sure is schizophrenic in here

Anonymous Thu Sep 9 22:27:43 2010 No.1730883

I just want to point out that if she says no water was already in the box, she also implies something else probably was.

Also, she's a chemistry teacher. No chem teacher in the world tries to wow a class of teenagers with thermal expansion. No, they wow teenagers with PURE MOTHERFUCKING MAGIC (I.E. Chemical Reactions). Evidence: food-colored water.

>>	Anonymous Thu Sep 9 22:27:43 2010 No.1730885 >>1730877 i dont think you know how to quote properly

Anonymous Thu Sep 9 22:27:43 2010 No.1730886

>>1730796
This shit is important: did you drink it or not?

If you drank it, then it's almost definitely ice because she probably isn't gonna ask you to drink something that was interacting with peroxide a few seconds earlier.

If you did a pH test or something like that to demonstrate that it's water, then I'd say you may have a pretty good teacher (and I don't know how she did her trick).

Anonymous Thu Sep 9 22:30:43 2010 No.1730900

Does anyone have an easy solution for this? It's not supposed to be worth even that much extra credit and she told us this is because that it can be recreated pretty easily, as in with simple household items. So I'm pretty sure there's no really serious chemicals.

>>	Anonymous Thu Sep 9 22:32:43 2010 No.1730908 >>1730886 No, we didn't drink it. But after observing it, she assured us that it was water.

>>	Anonymous Thu Sep 9 22:33:43 2010 No.1730913 >>1730883 LOL, for "PURE MOTHERFUCKING MAGIC" I recommmend this experiment http://www.youtube.com/watch?v=IBa4kgXI4Cg

>>	Anonymous Thu Sep 9 22:33:43 2010 No.1730915 >>1730908 She never said there wasn't other stuff in there with the water, though.

>>	Anonymous Thu Sep 9 22:33:43 2010 No.1730916 >>1730900 depends on what is considered household, some chemists have things that are considered household to them, but are serious chemicals. For example, my old chemistry teacher actually had shit like hydroxylic acid on actual tap in his house

>>	Anonymous Thu Sep 9 22:36:43 2010 No.1730925 >>1730916 No shit sherlock. That over 9000 times more dangerous than dihydrogen monoxide

>>	Anonymous Thu Sep 9 22:36:43 2010 No.1730926 File: 9 KB, 210x175, 1281151272506.jpg [View same] [iqdb] [saucenao] [google] >>1730916

>>	Anonymous Thu Sep 9 22:36:43 2010 No.1730927 >>1730916 Well I guess household to the average person.

>>	Anonymous Thu Sep 9 22:39:43 2010 No.1730933 >>1730900 Well, All I can say is, you had better post the answer when you find it. And it had better not be some lame shit like Ice cubes.

>>	Anonymous Thu Sep 9 22:41:43 2010 No.1730943 OP is your chemistry teacher hot All of the high school chemistry teachers i've ever seen are highly attractive

>>	Anonymous Thu Sep 9 22:45:43 2010 No.1730958 >>1730943 i should also add that I used to masturbate to my chemistry teacher in high school very frequently

>>	Anonymous Thu Sep 9 22:47:43 2010 No.1730971 >>1730958 you're why we can't solve this now. You've masturbated your brains out. Come on people! This is HIGH SCHOOL CHEMISTRY XTRA CREDIT! We should be able to fix this.

Anonymous Thu Sep 9 22:48:43 2010 No.1730975

Think of what you saw.

Increase in volume, removal of solute.

How do you increase volume?
-decrease pressure
-increase heat
-add something

You can pretty much rule out the first two since it's a shoebox/household items

How do you remove a solute?
-break it down chemically
-filter it

Idk much about solutions in general, so there's probably more. Either way, my guess is there is an addition of some rando chemical, vinegar/salt/ammonia/bleach/etc.
Go go science, experiment!

Anonymous Thu Sep 9 22:49:43 2010 No.1730978

>>1730943
> All of the high school chemistry teachers i've ever seen are highly attractive

semi-agree.

My high school chemistry class had two teachers (because I was somehow in the fucking dumbass class even though I got all As and Bs throughout high school). One of them was average-looking and bitchy, and the other was really nice and actually had a pretty cute face... but was also pretty chubby... not that I care, which is probably why I'm currently dating a chubby girl with a cute face <_<

As for OP's question, the fact that it went in dark blue and came out light blue implies that it was diluted by something, perhaps a large amount of some powdered solid that was absorbed into the water. You said you're sure it was water that came out, but perhaps it wasn't pure water. If you know anything about chemistry, you'll know that you can't tell for sure unless you test it, because looking and sniffing isn't sufficient to identify a chemical.

As for the person who said the water was heated... I'm pretty sure the volume of water doesn't change worth a damn with temperature. It would expand slightly, but it would not be noticeable.

>>	Anonymous Thu Sep 9 22:51:43 2010 No.1730986 >>1730978 Someone, (possibly not op) stated that the teacher asserted it was water at the end. Which just make it impossible.

Anonymous Thu Sep 9 23:00:43 2010 No.1731022

>>1730986

Did she say it was pure water?

If she says that some amount of pure water went into the box, which had no water in it, and then a larger amount of pure water came out, it's simply impossible.

It was probably water diluted by something. Either that, or it was an optical illusion, and the amount coming out was made to look larger (e.g. by catching it in a smaller cup). But it's probably not an optical illusion, since this is a chemistry class we're talking about.

In fact, since it is indeed a chemistry class, I think it's safe to assume that some kind of chemical reaction took place, which means something other than water was involved. If the teacher denied that anything other than water came out, she is probably just stretching the truth because she thinks she's a fucking magician and doesn't want to give anyone extra credit

>>	Anonymous Thu Sep 9 23:02:43 2010 No.1731031 >>1730958 lol

Anonymous Thu Sep 9 23:03:43 2010 No.1731038

>>1730986

If the water came out colder than the only solution left is ICE. which is not WATER. they have different properties, htough they are both H2O.
However, if it was a block of ice that was in the box it would take much longer than 15 seconds. IF, however, the ice was in some shape that greatly increased its surface area, such as very small crystals or squares. Perhaps shreded ice or something with even more surface area. If the ice was something like that then the water would melt it much faster, maybe even in 15 seconds. This solution would also provide a noticable increase in volume

>>	Anonymous Thu Sep 9 23:04:43 2010 No.1731040 >>1730761 I still cannot think of a better solution than these. The 2 chemicals are very common after all.

>>	Anonymous Thu Sep 9 23:04:43 2010 No.1731043 >>1730798 faggot you know what i meant it's fucking ice

>>	Samefag Thu Sep 9 23:04:43 2010 No.1731044 >>1731022 Dilute H202 + catalyst fits, as nothing but water (and oxygen) come out the end, but that presupposes the existence of water in the box for the peroxide to be diluted by.

>>	Anonymous Thu Sep 9 23:06:43 2010 No.1731050 >>1731038 Well, my chem teacher said that there were also no forms of water inside the box, sorry I didn't mention that before. So I don't think there's ice or steam.

>>	Anonymous Thu Sep 9 23:07:43 2010 No.1731052 magnets might work

Anonymous Thu Sep 9 23:08:43 2010 No.1731056

>>1731038

Water is still called water in its solid form, right?

If there was ice in the box, she's just a bad chemistry teacher who doesn't know shit. Even if you claim that solid H2O can only be called ice, and that "water" only refers to the liquid form, you simply cannot have a shoebox full of ice without any amount of liquid water inside.

>>	Anonymous Thu Sep 9 23:09:43 2010 No.1731061 >>1731044 Yeah, I don't think you can buy pure H2O2. That's why I went for a acid base answer.

>>	Anonymous Thu Sep 9 23:09:43 2010 No.1731063 Ice. It was in a bowl-shape until it melted.

>>	Anonymous Thu Sep 9 23:10:43 2010 No.1731066 >>1731050 sure, now you remember. lol

>>	Samefag Thu Sep 9 23:10:43 2010 No.1731072 >>1731063 >Significant amounts of ice melt in the presence of normal tap water in fifteen seconds Your ideas intrigue me, and I wish to subscribe to your scientific journal.

>>	Anonymous Thu Sep 9 23:11:43 2010 No.1731077 An ice cube glued to the hole.

>>	Anonymous Thu Sep 9 23:12:43 2010 No.1731080 >>1731066 Haha, sorry about that. When I said water I guess I didn't specify including ice and steam.

>>	Anonymous Thu Sep 9 23:14:43 2010 No.1731088 >>1730971 That anon is right, we should be able to crack this. OP! How long did it take for the second cup (with moar water) take to fill up?

Chemistry Guy Thu Sep 9 23:14:43 2010 No.1731091

The water she poured could have been hot water and she poured it into a cup made of ice inside the box. It would take awhile for it to melt and it would increase the volume of water..... Are you sure she didn't say there was no liquid in the box instead of saying there was no water in the box? It would also explain a lighter color blue when added to the box.....

Anonymous Thu Sep 9 23:15:43 2010 No.1731094

guaranteed its just ice in there holding back the water flow. inb4 hurrdurr ice is water. no shit.

any kind of powdered acid+base dissolution and neutralization is going to liberate way too much heat to happen in 15 seconds and produce visibly more water at the end.

especially dissolving naoh and immediately neutralizing a strong acid, fukkin lol. that doesn't make water that would make a steam acid+base explosion.

>>	Anonymous Thu Sep 9 23:16:43 2010 No.1731096 >>1731088 Actually the more important question is, How much more water came out compared to what was poured in?

>>	Anonymous Thu Sep 9 23:16:43 2010 No.1731097 >>1731077 No, no. The tubes are made of ice cubes

>>	Anonymous Thu Sep 9 23:20:43 2010 No.1731113 >>1731094 Well citric acid is weak enough. But I would agree that there is a small risk. (If hot conc. NaOH comes spurting out... That will fail every safety criteria for a high school experiment.)

>>	Anonymous Thu Sep 9 23:23:43 2010 No.1731128 >>1731088 Uh, well the water just poured from a little hole with a small open tube. It didn't take that long. >>1731097 >>1731094 >>1731091 She said that there's no ice inside. A lot of people thought it was ice too, but she said that it wasn't.

>>	Anonymous Thu Sep 9 23:23:43 2010 No.1731129 >>1730761 Poster made a small mistake with the first level but I fixed it. Try this and see if it works.

>>	Anonymous Thu Sep 9 23:24:43 2010 No.1731131 File: 70 KB, 621x701, science.jpg [View same] [iqdb] [saucenao] [google] >>1730761 Poster made a small mistake with the first level but I fixed it. Try this and see if it works. (pic related)

>>	Anonymous Thu Sep 9 23:27:43 2010 No.1731146 File: 5 KB, 198x254, Clipboard21csetc5.jpg [View same] [iqdb] [saucenao] [google] >high school chemistry >88 posts and counting >STILL unresolved >best thread this week >mfw

>>	Anonymous Thu Sep 9 23:28:43 2010 No.1731147 >>1731131 do you know what happens when you add water to solid naoh? have you ever even used naoh? there's no way thats what the teacher did

>>	Anonymous Thu Sep 9 23:31:43 2010 No.1731166 >>1731146 Haha, yeah this is harder than I thought it would be.

Anonymous Thu Sep 9 23:35:43 2010 No.1731185

>>1731147
Yes, I have. It dissolves rapidly and the solution becomes how. You can buy it here.
http://www.sigmaaldrich.com/catalog/ProductDetail.do?lang=en&N4=S5881|SIAL&N5=SEARCH_CONCAT_
PNO|BRAND_KEY&F=SPEC

However as I said earlier. It is a bit dangerous for high schoolers... So it is a technically correct answer but probably not what your teacher used.
>>1731131
Good way to blow shit up dude. Pour water on solid Na -.-

>>	Anonymous Thu Sep 9 23:36:43 2010 No.1731190 >>1731185 becomes hot, I mean.

>>	Anonymous Thu Sep 9 23:38:43 2010 No.1731197 >>1731147 If you look carefully you'll see that I've corrected the NaOH in my diagram.

>>	Anonymous Thu Sep 9 23:39:43 2010 No.1731206 File: 91 KB, 412x284, 1282089554560.png [View same] [iqdb] [saucenao] [google] 3rd suggestion

>>	Anonymous Thu Sep 9 23:39:43 2010 No.1731207 PLEASE post the answer when you find out OP

Anonymous Thu Sep 9 23:40:43 2010 No.1731217

OH Wait. Solid NaOH can be considered a household chemical after all...

Solid formulations of corrosive drain cleaners in the form of sodium hydroxide or potassium hydroxide granules can provide more concentrated effective ingredients.
http://en.wikipedia.org/wiki/Drain_cleaner

as for citric acid, I have that in my kitchen. I bought it from a supermarket.

Anonymous Thu Sep 9 23:45:43 2010 No.1731239

>>1731207
I will if I do. Unfortunately, my teacher will not tell us if none of us figure it out. I asked some older students and they said that they never found out from their teachers. Apparently only like one kid that my teacher had had figured it out.

>>	Anonymous Thu Sep 9 23:46:43 2010 No.1731249 Wouldn't a heaping pile of any substance that dissolves very readily into the water increase the volume of the final solution?

>>	Anonymous Thu Sep 9 23:49:43 2010 No.1731269 Just put a bottle of hydrogen peroxide in there, and then have her drink it to prove it's water. Big laughs all around

>>	Anonymous Thu Sep 9 23:50:43 2010 No.1731272 >>1731249 LIke a substance with a very high solubility in water (measured in mass of dissolved solute per liter). Hell it doesn't have to be a solute. It could be a clear liquid. Like pure alcohol.

Anonymous Thu Sep 9 23:52:43 2010 No.1731283

my money is on a siphon system.

look up how a toilet flushes without having to run the shit through any valves, that is how I think it is being done. the fluid inside could be an alcohol and hence "no water inside"

just for fun go look at your toilet bowl. see how the water level is like halfway up? now try pouring a gallon or two of water in there all at once. it will fill the siphon and the toilet will flush and the water level will drop below the original water level until the refill valve fills it back up. more water went down the drain than you poured in, just like ur teachers magic box.

>>	Anonymous Thu Sep 9 23:52:43 2010 No.1731287 >>1731249 I mean, the solubility of NaCl is ~359 g/L at room temperature. Wouldn't that work?

>>	Anonymous Thu Sep 9 23:54:43 2010 No.1731290 >>1731249 I'd say the volume increase was too much to be just an added substance. Like around a quarter to a half of a cup extra. We didn't get to measure exactly.

Anonymous Thu Sep 9 23:54:43 2010 No.1731291

>>1731249
not really. Not many chemicals can dissolve in less than 15 secs. Also, the change in volume after dissolution is not strictly additive. The volume can actually decrease after mixing. Especially if the heat of mixing is exothermic.

Oh heck, I'm off to sleep. Good luck OP.

>>	Anonymous Thu Sep 9 23:57:43 2010 No.1731300 >>1731283 You can identify alcohol by the smell. It's a dead giveaway.

>>	Anonymous Thu Sep 9 23:57:43 2010 No.1731301 >>1731291 Thanks. If we don't figure it out tonight, I might post a new thread tomorrow or over the weekend after I try to find more info.

Anonymous Thu Sep 9 23:59:43 2010 No.1731312

Piagetian experiment. Teacher probably poored the water in with a fat, short cup, and then caught the water with a skinny tall cup. Highschoolers might not have learned conservation of mass yet. There's no hope for society.

You should have asked to drink the magic water. If she didn't let you then it was most likely a chemical in the box.

>>	Anonymous Fri Sep 10 00:00:43 2010 No.1731313 Hey OP, you know what magicians hate? When you touch their props. Just rip the top off of the shoebox.

>>	Anonymous Fri Sep 10 00:05:43 2010 No.1731332 >>1731312 Both cups were the same size and type.

Anonymous Fri Sep 10 00:06:43 2010 No.1731337

there is no way to create a half a cup of water in 15 seconds that doesn't require or liberate enough energy to turn the rest into steam or ice.

either there is ice in the box, or the added volume is something besides water. acid/base neutralizations resulting in significant quantities of water are simply not possible in this amount of time.

Anonymous Fri Sep 10 00:08:43 2010 No.1731344

>>1731332
hmmm... think about this though... What if there were a smaller glass inside the second glass? In which case it would appear to increase the volume, and might even lighten the darkly colored water...

Which would make the shoebox a piece of misdirection, and would make your teacher a brilliant magician.

>>	Anonymous Fri Sep 10 00:08:43 2010 No.1731347 >>1731332 they weren't beakers were they? I mean, is it possible that there was a second glass inside one of the glasses?

>>	Anonymous Fri Sep 10 00:11:43 2010 No.1731358 >>1731337 You're probably right. It was probably smaller than half a cup, but my main point is that there was pretty noticeable change. >>1731344 Well its a chem class, so there must be some kind of reaction going on. I don't think theres any illusion.

>>	Anonymous Fri Sep 10 00:13:43 2010 No.1731368 hmm...my only guess is that there was some sort of Hydrate reaction involved.

>>	Anonymous Fri Sep 10 00:15:43 2010 No.1731378 >>1731358 but what kind of glasses were they?

Anonymous Fri Sep 10 00:16:43 2010 No.1731381

>>1730641 She said that there wasn't any water already inside the box.

What we have here is wordplay. This statement does not preclude the existence of alcohol or a thousand other chemicals which look just like water. If she never explicitly stated the liquid which exited the box was water all of her statements and your observations can simultaneously be correct.

I'm sure there are a few reactions that could produce the 15 second delay; sorry not a chemist.

>>	Anonymous Fri Sep 10 00:17:43 2010 No.1731390 >>1731378 Measuring cups for science. They weren't thin beakers or anything like that.

>>	Anonymous Fri Sep 10 00:19:43 2010 No.1731399 >>1731381 I agree, I'm definitely planning on asking her tomorrow on whether the liquid that came out was pure water. The answer to that would narrow down the possibilities a lot.

>>	Anonymous Fri Sep 10 00:20:43 2010 No.1731410 >>1731399 explain this shit to me http://www.youtube.com/watch?v=vrdiLFsCWBg

>>	Anonymous Fri Sep 10 00:23:43 2010 No.1731423 >>1731410 Pretty sure that there's water already in the cups. That's why the liquid becomes more dilute.

>>	Anonymous Fri Sep 10 00:27:43 2010 No.1731442 File: 5 KB, 239x211, CharlieJade.jpg [View same] [iqdb] [saucenao] [google] Shit son, your teacher is stealing water from GammaVerse. You must kill your teacher before she connects Gamma and Alpha, collapsing Beta(we live in Beta). Go now, kill her.

Anonymous Fri Sep 10 00:31:43 2010 No.1731467

>>1731410

very basic distraction, you are only watching the cup being poured into leaving the dude able to do whatever the fcuk he wants with the cup he is pouring from. in this case he is using some kind of contraption to slowly add water to the glass he is pouring from.

>>	Anonymous Fri Sep 10 00:33:43 2010 No.1731479 >>1731467 Probably just crappy trick glasses borrowed from Chris Angel. There is a reason they have that stupid pattern to them that obscures details inside them. Nobody would buy glasses that ugly without purpose.

Anonymous Fri Sep 10 00:34:43 2010 No.1731490

OP here, I'm gonna head to sleep now. I'll probably post a new thread sometime tomorrow or during the weekend once I get more info on this, if anybody cares. If I ever get answers, I'll post them for the people who asked. Thanks to everyone that contributed! Especially considering that this is over 120 posts long :)

>>	Anonymous Fri Sep 10 00:36:43 2010 No.1731496 Possibly some sort of viscogen / thickening agent? Something like starch or glycerol could possibly occupy lots of space and yet be clear. Did the liquid seem goopier than water?

>>	Anonymous Fri Sep 10 00:55:43 2010 No.1731553 Scientist here... In my lab I find that urea (a chemical in many bath products) dissolves in water and causes a rather large volume expansion. Box full of bath beads?

>>	Anonymous Fri Sep 10 00:58:43 2010 No.1731569 OP you should forget the extra credit and consider transferring to a different class. your teaher is clearly a attention whore, and isn't going to teach shit.

Anonymous Fri Sep 10 01:22:43 2010 No.1731671
File: 8 KB, 389x342, EnclosedLiq.jpg [View same] [iqdb] [saucenao] [google]

I know I've seen it before, but whats a solid that could hold a liquid in suspension or whatever and then degrade to release that liquid when touched by water?

Or, something solid that dissolves in water, holding something that wont dissolve it?

Like a baggy made of that paper or packing shit that falls apart in water, with some thick shit like cooking oil inside it.

-point would be- when water is poured onto the shit, the oil or whatever would come out with the water to look like more

Anonymous Fri Sep 10 01:32:43 2010 No.1731723

The simpler answer of course is to bring your own shoebox to prove you figured it out.

Pour water in the hole.
--Now, while she's right there beside you to observe, take off the top of the box to reveal a bomb that was turned on when you poured water into the hole.
---Tell her you will only disarm the bomb once she has given you the real answer.
PROFIT!!

>>	Anonymous Fri Sep 10 01:36:43 2010 No.1731735 File: 9 KB, 420x500, ikea-dick-in-the-box-0 (1).gif [View same] [iqdb] [saucenao] [google] The answer.

>>	Commander Amarao Fri Sep 10 03:02:43 2010 No.1732091 File: 93 KB, 500x398, 1275900792001.jpg [View same] [iqdb] [saucenao] [google] that teacher's trollin the shit out of you all

Anonymous Fri Sep 10 03:48:43 2010 No.1732190

This is what you must do OP..

tell her you couldn't figure it out so you just randomly started adding household chemicals together. Say when you mixed clorine and ammonia a strange reaction happened. Ask her if thi was the reaction...

See if she freaks out.

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