frosch45

If I'm not mistaken, the reaction of acetic acid (vinegar) and sodium bicarbonate (baking soda) yields carbon dioxide and sodium acetate but you would have to evaporate it for a LONG time that way because vinegar is extremely dilute

haha Well, I was just thinking theoretically.... I supersaturated Sodium Acetate a while ago, It was kina interesting, I just didn't realize that it would also work to super cool it. And of course insane_alien, I would think it only proper for the subjet to have his or her mouth full open with the back of the throat exposed for easy access And I personaly have seen a whole liter of supercooled water freeze!

If you were to take distilled water and supercool it (take the temp below the boiling point but it still remains in the liquid phase) and then if you were to attempt to drink it, would it freeze in your throat and possibly suffocate you!? Just reading a little of a chem book that I have, the thought occured to me, thought it was interesting.....

Shows you how reliabe wikipedia is....

I know that N2O can be formed by decomposing ammonium nitrate or mixing sodium nitrite and hydroxylammonium chloride, but I also saw this equation on wikipedia. Does aqueous ammonium nitrate really decompose into nitrous oxide and water? NH4NO3(aq) -> N2O(g) + 2H2O(l)

I decided that I would just see if this worked, I did some reasearch, and I thought that it would, but, well.... 1) I took some magnetite, Fe3O4 (30 g), put it in an Earlenmeyer Flask, and added an excess of HCl 2) Reaction did proceed very slowly, after about 20 hours the solution had turned a clear yellow color. I assume that this yielded 1 part FeCl2 and 2 parts FeCl3? (also water) 3) I then added an equal amount of Ammonium (aq) (calculated using (M1)(V1)=(M2)(V2)) 4) The solution only turned a more clear color, but there was no precipitate of Fe3O4. Am I expecting something that is not supposed to happen or did I do something wrong? PS trying to see for ferrofluid , I could grind it up using a metal grinder, but it bothers me that I don't know what happened thanks in advance UPDATE: really wierd, there seems to be an orange cloud with a definate shape occupying a small amount of space (it will not settle even after 30 min) on a clear and colorless background. also, I added some excess ammonia (aq) and there were 2 layers that developed (meaning the 2 colorless solutions--ammonia and the one containing the orange cloud--have different densities)

Any help on this problem would be much appreciated, I really think that chemistry is pretty much the coolest thing in the world. Anyway, for extra-credit, my teacher gives a few of us students some interesting chemical problems every now and then. I am wondering if anyone would be able to help with this one. I need to know of a technique or substance--possibly hydroscopic?--that will react with water but not a halogen in order to form a solid precipitate and/or gas so that much H2O (in the problem, bromide was given as the halogen dissolved) could be then removed from the solution--and yes, it could be anything from arsenic to zirconium (obviously, neither would apply, just saying it doesn't necessarily have to be extremely common or easy) I have been looking around a bit--could someone just generally explain the principle of drying agents? I was thinking maybe activated carbon--the solution could be boiled and then run through activated carbon (or similar substance, any ideas?) and returned to another container?? Maybe sodium hydroxide (except that would mess with the bromine, right?) I'm not sure if sparging would work in this situation because of the evaporation removal of the bromide molecules (or ions if aqueous) but it can not be simple distillation:rolleyes: something that would only minimally lose the Br thanks hs

Does anyone know how to concentrate hydrogen peroxide further? I know of these methods: 1. Freezing: requires qutie low temperature, anyone want to explain fractional freezing any further, especially if it would be a good way for H2O2 2. Simple Distillation: BAD IDEA, doesn't it automatically combust (or at least the vapors) 3. Sparging: More information needed, something about running air through the solution 4. Vacuum distillation: Quite good, but not easy to keep vacuum, anyone ever done this? (and wants to share their secret) if i were to further distill it, I would like to expiriment with rocket propulsion, but first, I must get a higher concentration

Does anyone know how to make a bubble that bounces? By bubble I mean like the kind you blow, the soapy kind. Possibly something that increases the interior surface tension of the bubble? Glycerine?

cool thanks any others??

does anyone know how to do this? my teacher said that she can prove it, she said that in ceartain instances, numbers may be forced to do things that they are not supposed to do.... alternatively, does anyone have any other simple problems like this that you could prove like 1+5=5 or something seriously, any ideas at all, no matter how absurd OR complex, would be appreciated

I'm wondering the difference between isopropyl (spell?) alcohol and ethyl alcohol. Obvioulsy they have different chemical formulas and different applications.... But I was wondering if using isopropyl alcohol in an ethyl alcohol lamp would be bad? I don't want to ruin the equipment or anything, i'm guessing that I wouldn't, but does one burn hotter than the other? thanks

Please respond, do you think that this is possible.... oh and by the way, i'm not some freak that thinks explosions are cool or fire is fun to play with, but this is very interesting... 2Al (s) + 6HCl (aq) ..(yields).. 2AlCl3 (aq) + 3H2 (g) so you get aluminum chloride, (performed in an ice bath) right? then 2AlCl3 (aq) Electrolysis using iron cathodes and anodes 2AlCl3 (aq) …. 2 Al (s at cathode) + 3 Cl (g at anode) + 2H (g at cathode) + Fe2O3 (s at both of the poles) and then let the excess water evaporate things to consider 1) would this even work 2) would the ratios be correct 3) you would have to keep scrubbing the cathode and anode to rub off the Fe2O3 4) nothing else would be produced right? 5) is there an ideal temperature?

you know what i mean

Jeez, this is really annoying... HOT ICE When sodium acetate trihydrate crystals (melting point 58 °C) are heated to around 100 °C, they melt. When this melt cools, it gives a supersaturated solution of sodium acetate in water. This solution is capable of supercooling at room temperature, well below its melting point, without forming crystals. A nucleation center may be formed which causes the solution to crystallize into solid sodium acetate trihydrate again. The bond-forming process of crystallization is exothermic, hence heat is emitted. It looks like when you touch it like a bunch of ice just spreads out from your touch. Anyway, I'm having serious problems I reacted vinegar with baking soda to get the sodium acetate, then I heated it so the water wasn't boiling but it was steaming in order to distill it and make it more concentrated Then, after I had boiled all of the water out, just the crystals were left. I then added just a little bit of water, and then took the solution and then let it cool to room temperature. After it cooled, I provided a nucleation center in numerous ways, but nothing happened! I was really disappointed. The solution was very supersaturated, I would describe it as a black-yellow. PLEASE HELP just search youtube or google for videos, it seems like it has worked for lots of other people

Anyone have suggestions for a good chemistry book? I have pretty good knowledge of chemistry, understand the language, but i would love to learn more. Preferably, I would like one with expiriments in it.

the school, not mine, thats why i dont understand and yea, regedit and gmedit is disabled, and also run (but could this be fixed by using notepad?

i dont know what i did, but for some reason the cmd on my comp is disabled! when i open it it says COMMAND PROMPT HAS BEEN DISABLED BY SYSTEM ADMINISTRATOR whenever i press any key, regardless of what it is, cmd just closes does anyone know how to fix this? any help appreciated

baume is just another way of measuring it.... its about 10.25 mol

I have 20 Baume Hydrochloric Acid, concentration of about 31.25%. I know that performing electrolysis on the solution would only produce hydrogen and oxygen, but is there any way (or any reaction) to seaparate this into hydrogen, oxygen, and/or chlorine (diatomic gasses)?

more than, actually im not really doing the expiriments at this point, just getting educated, and im probably not going to even end up doing it i dont even have any lab equipment its just really fascinating that two completely seaparate and unlike substances can do extraordinary things together

maybe i wont then

1)Rotten eggs make the gas H2S (hydrogen sulfide) right? If I was to bubble this through water would I have this as an aqueous solution? 2)then could I perform electrolysis on the water and get the hydrogen and oxygen out? or would boiling the water be better and leave solid sulfur behind? 3)better yet is there any way from common household products or easily available products to get sulfur in a mostly pure form (its more interesting rather than buying it) 4) just out of curiosity is there any random store that sells pure sulfur

If you took toothpaste, is there any way that you could get fluoride (F2) gas. I realize there are impurities, which would have to be filtered, and there is only a very small amount in one tube of toothpaste. Any help appreciated...

I'm not sure this is where this goes but any help would be much appreciated I recently hooked four 9 volt batteries together in a series circut, with the positives going to the negatives then on the end batteries I took 2 wires and put the ends in a small tub of water. After about an hour or so, one of the bottoms of one of the batteries exploded and shot out this powdery clearish stuff with a little bit of green in it. Does anyone know how I should do this so this doesn't happen? Should I do a parrallel circut (plz explain) or get a different type of battery? Also what is the difference between a watt and a volt?