frosch45

I'm not even sure if this is where this thread belongs, but here goes. A few months ago I baught a Neodium manget. Worked great when I got it, really strong, but now, it can barely lift a pound where as before it could lift 80! I think I remember reading somewhere that magnets lose their power over time? Is there any way that I can recharge my magnet? Its just a cylindrical neodium manget about 2" tall and 1" diameter. I won't pretend to know what I'm talking about though.

Well, it may be possible to make the table, but the vibrations do have to be quite powerful and your angle must be quite slight. This all depends too on the fact that some of the foil/NaOH pellets may be different sizes (in the case of your straining idea) or different masses (in the case of the table). As for your CO2 problem, NaOH would be converted into Na2CO3, carbonate has a -2 oxidation state. And yes, an average room would be too ventilated. One way to do it would be to buy yourself a can of Argon from a welding supply shop, and make a makeshift "critical care unit" (the ones that they use for infants that are in danger of dying, its basically a sealed box with gloves attached to one of the sides in which you can grab things on the inside) out of some plexiglass and some glue. Then fill the thing up with argon, seal it, and separate your material. This is still a pretty intense process all for just some NaOH though. You can buy it on the internet.

I don't think that you would have access to this (I say that because almost no one has access to this) but for the sake of providing an answer.... Ever seen those big vibrating tables? They have them in food processing plants. I don't even know the technical term for the process, but basically they are like a centrifuge for solids. They are built on very minute angles and the heavier or bigger material will fall to the bottom of the table, but the lighter or smaller particles will go up on top.

Not exactly sure, but HF can dissolve certain types of glass. It reacts with SiO2. 38% is less conc, and your titration equip may not be able to handle it at 50%.

Depends on your setup. You could just use ice water in a bucket with a water pump, or if you wanted to get it really really cold, use acetone and dry ice. All a "coolant" is is a liquid. You do have to cool the coolant before it will be "cold" via some other cold material (unless you actually do have a set up that can handle the pressure/volume/temperature type of cooling system where those variables are changed to produce a colder area and a hotter area in a system, although I have a hard time believing that) So really, water would be work but overall with pretty poor results, ice water would be like 5-6 C (without addition of NaCl or a similar salt), dry ice in acetone would be like -60 C. Buy a small water pump, have a bucket (or suitable holder for your coolant) pumping the liquid into the bucket from your condenser and have another line out of your bucket going into your condenser but not attached to your pump, only have it hanging in the bucket (if that makes sense).

i read that in another post by you a while ago when i didn't know much about carbamide. i nearly fell off of my chair laughing, even though after I got a hold of myself i found that you were right I know that glass is fine, and that brown glass bit was helpful, but what I'm mainly concerned with is how to seal it. Is a regular old glass stopper fine? I have never really wanted to buy a $500 lab fridge

Thats a great price depending on the capacity of it. Where did u get it? As far as using it, what do you need to know? You should use a flask with a similar capacity for your recieving flask as well as your boiling flask. I trust you have a ring stand? If you don't you can get very cheap but high quality ones from hometrainingtools.com. You might want to grease your joints for a tighter seal, maybe use vasoline. Keck Clamps would be useful to you as well to hold it together tightly. For your condenser, depending on the type and assuming you don't have a pump (although you may), just have a huge bucket of ice water higher from your condenser and "siphon" the water downward through the condenser (using appropriate hosing) and have another bucket underneath the outlet of the condenser to collect the water. Either that or hook up your condenser to a faucet. What exactly do you need to know?

I'll go ahead and ask this then. Since you seem to disagree with my thinking about this kind of bottle being ok http://dbhs.wvusd.k12.ca.us/webdocs/...assStopper.JPG and I will not pretend that I know more than you do at this point I was wondering what you would suggest YT? I have come across many glass flasks with Polyethylene stoppers. Would this be okay for, say, nitric acid? I am pretty sure that the answer is no..... I was planning on making some nitric acid next week because I am in the very final stages of picking up a distillation apparatus for a good price (unless someone has any places where I could get one for cheaper than $100 US (and that includes the condenser, flasks, and adapters)) And I wanted to store it. I am planning on using KNO3 and sulfuric acid, both of which I have. So what do you recommend, not just YT, but anyone with reasonable expierence. I was planning on making somewhere around 500 mL. EDIT: for example, would any of these work? http://cgi.ebay.com/Hand-blown-Wine-Decanter-1000ml-Poland-New-FREE-S-H_W0QQitemZ110166315308QQcmdZViewItem?hash=item110166315308&_trkparms=39%3A1%7C66%3A2%7C65%3A15&_trksid=p3286.c0.m14.l1318 http://cgi.ebay.com/Pyrex-1000-ml-Flask-s_W0QQitemZ150237755980QQcmdZViewItem?hash=item150237755980&_trkparms=39%3A1%7C66%3A2%7C65%3A15&_trksid=p3286.c0.m14.l1318 http://cgi.ebay.com/Reagent-Bottle-Apothecary-Jar-Chemical-Storage-1000mL_W0QQitemZ190223885314QQcmdZViewItem?hash=item190223885314&_trkparms=39%3A1%7C66%3A2%7C65%3A15&_trksid=p3286.c0.m14.l1318

Its like how on swimming pool chemical tubs they have all of the cautionary statements that the oxidizers are flammable. They themselves are not flammable, but when mixed with something like sucrose.....

You're right. Helium and Neon if i'm not mistaken, but argon does react with it (or maybe I should say fluorine reacts with argon)

I remember before I changed my Br2 into AlBr3 (quite a while ago--I was much more stupid) I did have it in a glass flask with a glass stopper on top. I taped the stopper onto the flask very tightly. Big mistake:rolleyes: Within 48 hours my "lab" stunk really bad. When I checked on the flask, I discovered that not only had the Br2 squeezed by the glass stopper, it had significantly corroded the tape.... Then I decided that it wasn't such a good idea to have bromine sitting around.

I honestly didn't mean to be rude. Unfortunately, text cannot easily display emotions. You are quite correct that SO3 is used to make sulfuric acid in the industry. I have never heard of nitrogen oxides as a catalyst; that may be one way, however, vanadium(V) oxide is used more commonly I believe. It catalyzes the reaction of SO2 to SO3 around 400 C. The sulfur trioxide is then dissolved in oleum, not water. It is true that it could be dissolved in water, however, that is highly exothermic and is not very practical. Oleum is concentrated sulfuric acid with SO3 dissolved in it and water is added to the oleum to make a greater amount of concentrated sulfuric acid. And I completely agree in "wheres the fun in just buying everything", its just that sulfuric acid is one of those things that is pretty tuff to make at home, especially if you don't have the right equipment.

Actually, bromine's volitility could help you in this instance. pour your bromine/calcium chloride/HCl mixture into a beaker and let some of the bromine vaporize. Have a test tube in an ice bath waiting, and pour off the heavy vapor into the test tube. This is a pretty crude way of doing it, but if you really wanted to do this, and if you were very patient, you could get several mL.

I think that fluorine definitely has it. Which element has the highest EN? What won't it react with?

This is a very interesting read from Wikipedia too bad thats not more efficient or we could all have a few grams sitting in our labs of course...that completely ignores the whole saftey thing.... and white phosporus is certainly about 100 times more dangerous than red phosporus....

That bottle looks fine. Just as long as it's sealed well. Back to your origional question. I have never tried the electrolysis, but it seems to me that it would be much more difficult. Unless you have an apparatus already set up that is very resistant to corrosion, I think you should use the HCl method. All of the chemicals are readily available in one spot (pool supply store) and it is relatively safe. That will be the easy part though. The purification would be hard. You might use a dessicator or something and distillation (but the volitility of Br is annoying). Anyway, you will definately get impure bromine water either way, unless you are electrolyzing molten NaBr, wich would be very difficult indeed. Just don't get any on your skin. </gross understatement>

You don't need an amber bottle in this case because Br2 will not decompose when put into contact with sunlight, it just needs to be glass. If you have just plain old plastic as your cap, then I definately wouldn't use those. When I first tried making some bromine, I just had these little bottles with actual teflon caps. It didn't really wear anything away, although, after I emptied the bottle to stabalize the bromine (well actually react it with some aluminum, and anyone who knows anything about bromine knows about this reaction. yes, it was quite spectacular ) the bottle stunk quite badly. Teflon is a very good idea in this case.

Please use the search engine.... its at the top of the page. And your above method, don't think so.... Where did you read that? One thing that I am 90% sure of is that oxidizing sulfurous acid with air will not make sulfuric acid... Heating sulfur, well actually, burning it in oxygen, will give you sulfur dioxide. If you oxidize this from hydrogen peroxide, then you can get a weak sulfuric acid. But its still just easier to buy some from a chemical supplier. Getting a sufficient concentration of H2O2 will be pretty hard though with the hazmat fees. I've seen sulfuric acid for sale at a home improvement store. But seriously, search "sulfuric acid" in the search field and read a little bit.

Its not that hard to get liquid chlorine.... Just use dry ice in some acetone in a large beaker and then have a test tube held by a clamp in that 'mixture'. Then have a tube feeding chlorine into the test tube and the chlorine will liquefy because its boiling point is -34.4 °C, and dry ice is colder than −78 °C. This way you don't need water in the equation. But it decomposes unless aqueous... so it wouldn't do much in this situation. It also decomposes a little over 100 °C IIRC... the hypochlorites just aren't very stable And I have looked all over the web for your heat of formation, but I can't seem to find it....

so we would need some sort of controlled fission explosion, actually, many many many explosions, and a whole lot of water and a turbine the size of a football field?

I am not trying to be rude at all when I'm saying this, please understand that, but I was meaning for that comment to be directed to scmatema, and not for the general thread

right, but its even simpler than that! why can't there be organisms very similar to our own. think of the extremely vast (it is incredibly uncomprehendable!) number of planets in our universe. there is no way that there is no other planet with a similar environment, and I would dare suggest that there are even many planets with a climate such as ours! so, one with water, one with oxygen (because if there is water then there is probably oxygen and hydrogen) and one with nitrogen and other metals and nonmetals created by radioactive decay.... I strongly believe that there are even organisms that are similar to us humans out there. If not humans, that certainly other organisms are reflected by similar species on other planets...

this is a very interesting question I volunteer so where would we get a GigaCoulomb maybe if we were to take the sun and then, say, alpha centauri, and took some sort of tractor beam and squished them together like how we do fusion here on earth with radiowaves and such.... lets fuse alpha centauri and the sun guys! oh wait, thats also incredibly rediculous too bad theres not a word to describe rediculous to the trillionth power.... because it would certainly apply in this situation I love how sometimes there are such funny things in science that the average jo would never understand in short--science is really really cool

if you wanted to play the religion card.... 1 Corinthians 3:18-19 should provide some clarification but if you want to look at it scientifically my personal thoughts are that if any one person claims that he or she can comprehend the vastness of the universe then they should be able to understand that it is incredibly ignorant and foolish of us to think that earth holds the only living organisims anywhere. there are literally countless numbers of stars and even more planets surrounding them. seriously, there is not one person on this earth that can imagine the number of stars out there. I think if you took the number of grains of sand on the earth and took that to the power of a mole (6.02 * 10^23), I think that then someone might just barely begin to understand the vastness of our universe (a mole of pencils standard hexagonal pencils in layers would cover the entire surface of the earth 12 feet deep) that being said, I think that it would be incredibly foolish to think that if life could somehow develop here on earth then life could not develop elsewhere life could somehow develop on a planet under similar conditions because there is certainly a planet that is under similar conditions somewhere in the universe

http://www.scienceforums.net/forum/search.php </stuck up adittude> no offense or anything, but I think that if you just go through the forums, you should be able to find what you are looking for....