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Everything posted by jdurg

  1. If you've got a lecture bottle full of the stuff, then yeah, just go with that route. It will be SUPER easy to show off singlet oxygen. You just have to make sure that the H2O2 is very basic before you do this. So add plenty of NaOH to the 35% H2O2 and bubble the Cl2 into there. I had always done it by using ammonia, but after seeing it done just as easily with NaOH, I'd say go that route. NaOH is very easy to come by and doesn't have the nasty smell that NH3 does. Plus, you don't have to worry about the formation of NH4Cl from any HCl and NH3 vapors in the air. So just go and get some NaOH, dissolve it in some H2O2, then bubble Cl2 into it. You'll see a pretty neat glowing reaction. (Never realized I was close to 2,000 posts. Means I've had far too much free time in the past four years. )
  2. If you're going to make Cl2 anyway, why not just get your singlet oxygen in that regard? The most visible emission of light happens with chlorine gas bubbled through a strongly basic solution of concentrated H2O2. (You can use concentrated ammonia, or what's probably better is concentrated NaOH, to make it basic). The red light given off is most intense when done in this fashion.
  3. That is correct. The Ga dissolves the aluminum oxide coating that covers all exposed aluminum and allows bare Al to react with water. Al is pretty reactive, but any time we typically encounter it the metal is covered in a very thin layer of the oxide which binds strongly to it preventing further reaction.
  4. It's actually pretty easy getting liquid N2. The problem is getting the dewar needed to transport the N2 as the gas distributors won't sell it unless you have a proper container. They will, however, let you rent one if want but that does add to the cost. (I can't remember what I paid for the Liquid N2.) The gas is sold by any welding supply distributor, or gas distributor. AirGas is a famous company that sells to the public. Once you've got it, you mix all your ingredients into a large steel bowl and mix them thoroughly. Then you just pour the N2 right into the mixture while stirring. (It helps having an assistant with this). It will instantly freeze up into tiny, small crytals and give you the best ice-cream ever. You just need to let it, ironically, warm up quite a bit before you try and eat it. ;D
  5. The best ice-cream I've ever made was with liquid nitrogen. Never had ice-cream that smooth and creamy.
  6. A couple neat experiments are to take a SMALL amount and put it in a plastic bottle. The pressure will cause it to liquify in the bottom. Liquid CO2 is kind of neat. You can then unscrew the cap and it will INSTANTLY solidify into a snowlike dry ice. Pretty neat to see. Another one is to take a chunk, hollow out the middle, and place some burning Magnesium into it. Then, cover everything with the dry ice and watch the Mg burn brilliantly in the dry ice. VERY neat to watch.
  7. I'd be pretty shocked if it was Potassium Ferricyanide as the mineral oil it's in is pretty pure and would have to have some really odd contaminants to form that compound. Regardless, I treat it with a LOT of respect and have not opened the container since the K went in there.
  8. True, but I don't think the Xenon would have all the regulations associated with it as SF6 does due to it being a very potent greenhouse gas.
  9. jdurg

    mole day!

    React a mole of sodium metal with a mole of chlorine. E.G. 1/2 a mole of Cl2.
  10. With a basically complete collection, it's difficult for me to post them all, but here's an image of the un-ampouled potassium metal I have under simple mineral oil. Hopefully it will show up here as it's an image I have uploaded to wikipedia. There are a multitude of different oxides on here with the standard gray/white potassium oxide, the yellow orange peroxides, various superoxides, and I have no idea what the red stuff is. The only red potassium compound I know of is potasium ozonide and I'm not really sure if that is what the red stuff is. I would love to get it analyzed to find out exactly what the red crystals are, but don't know who or where to go to in order to get that analysis.
  11. I believe that's a typo in his initial post because all of his following statements are those you would make if you replaced "proton" with "neutron".
  12. No. That is actually as far away from the truth as possible. When it's warm out, your body sweats to bring water to the surface of your skin. As the water gets to the surface, it evaporates. Water is able to absorb a LOT of heat before its own temperature rises (high heat capcity) and so it absorbs the heat from your body and takes it with it as it evaporates. The act of evaporation causes your skin to cool down, thus helping you maintain your body temperature. It feels hotter out when it's humid because there is a lot more water vapor in the air so the water in your sweat is not able to evaporate as quickly, and thus you have a harder time cooling off.
  13. I wouldn't consdier Be to be "insanely" toxic. It's not good for you, that's mostly in the form of the powdered metal as it causes a very nasty allegic reaction inside your lungs which is quite debilitating and potentilaly deadly. The ionic forms of Be, or the solid forms, I don't believe are nearly as nasty. It's not like arsenic which is bad for you in all senses of the word.
  14. I'm just wondering where the discussion of Ra and Po being proton sources came in. I can only see posts stating that they are neutron sources.........
  15. Bleach and ammonia, when mixed, forms a funky concoction of chlorine gas, chloramine gas, nitrogen trichloride, etc. etc. NOT safe at all.
  16. Actually John, he was talking about mixing it with Be which, if mixed intimately enough, will produce quite a large number of neutrons as the Be absorbs the alpha particles and spits out neutrons. As a stand alone source (e.g. without the beryllium), you're correct in that neither of those elements will give you any neutrons to count.
  17. jdurg


    Exactly. KCl is a VERY common salt substitute for those who are sensitive to sodium. The only way I've ever heard of potassium salts being toxic to people are when it is injected intravenously and it immediately goes to the heart before the kidneys can filter it out.
  18. I still think a Scandium ring would be neat. It does tarnish, but not to a horrifically horrible color. It becomes a golden purple type color and the tarnish doesn't build and build and build. It evens out and the metal is somewhat exotic and would make a great looking base.
  19. Take the CuO and dissolve it some warm sulfuric acid. Pure CuSO4.
  20. Even if there was enough on the planet to isolate, in the time it takes to produce the pure Fr it would have all decayed away. Also, as you go down the alkali metal group, the melting points get lower and lower. I would assume that Fr would have a melting point just at, or VERY slightly above room temperature. The INTENSE heat generated by the radioactivity would cause it to instaly melt and immediately react with anything in the area. Therefore, you wouldn't have any leftover as it would be nearly impossible to isolate.
  21. I would not go with Osmium myself. While the metal is a BEAUTIFUl blue color, the powder form does oxidize to form an incredibly toxic compound, and while the solid metal is less likely to do it, I don't think enough research has been done on the solid metal in constant contact with human flesh.
  22. jdurg


    Yes, but you'll still have water present if you do this in an aqueous solution. I would work in a vacuum chamber where all air is replaced with nitrogen gas. This will prevent any water from being present and any CO2 from turning the NaOH into NaHCO3. Then, take a very fine powder of NaOH, and place a great deal of HCl gas into it. After some time, the HCl will react with the NaOH forming NaCl and some H2O. So in reality, you can never have absolutely dry NaCl since the reaction itself produces an equimolar amount of H2O.
  23. All of the lanthanoid elements will tarnish over time. When in constant contact with the skin, that's even more produced. All of my lanthanoids, even though they're well protected, have tarnished over the few years I've had them so they wouldn't make a good choice. Rhodium will cost you a fortune as it's the most expensive non-radioactive element out there. (Currently around $4,500 an ounce, or even more. Haven't checked in a few days). I would possibly suggest a Scandium ring with a band of Palladium in there. The Scandium will slowly tarnish a yellow color while the Palladium will remain bright and shiny silver. Would look great as time goes on.
  24. Not sure about E-Bay because I bought my couple ounces of sodium many years ago before E-Bay really turned sour on anything that might be dangerous. So I'm not 100% sure now. Good point. Let's let it stay at that.
  25. Regardless, it doesn't matter. You do NOT need a license to posses or sell alkali metals. There is no category that it falls under which require a license for the possession. Licenses are required for explosives, some nuclear material, etc. If you required a license to sell it, you would require a license to possess it. Licenses are required to keep track of the location and amount of a substance. If you don't require a license to possess it, then having a license to sell it is meaningless. If you can show me where it states that you need a license to sell/posses sodium or other alkali metals then I will stand corrected. However, I highly doubt you'll find it.
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