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Everything posted by Melvin

  1. You can make KClO4 from NaClO4 and KCl. KClO4 has the lowest solubility of all the perchlorates (1.5g/100mL at 25 C). Most of the KClO4 should precipitate and NaCl would remain in solution.
  2. Why are you waiting until you get H2SO4? You need K2Cr2O7, NaCl, H2O, and electricity!
  3. I don't know how much you trust wikipedia, but I found this: "In the United States, the Drug Enforcement Agency (DEA) regards iodine and compounds containing iodine (ionic iodides, iodoform, ethyl iodide, and so on) as reagents useful for the clandestine manufacture of methamphetamine. Persons who attempt to purchase significant quantities of such chemicals without establishing a legitimate use are likely to find themselves the target of a DEA investigation. Persons selling such compounds without doing due diligence to establish that the materials are not being diverted to clandestine use may be subject to stiff penalties, such as expensive fines or even imprisonment." http://en.wikipedia.org/wiki/Iodine
  4. The chloride is not formed. You put the chloride in to get the chlorate. The electrolysis converts the chloride to the chlorate. If I remember correctly, the reaction is: 3H2O + NaCl --> 3H2 + NaClO3.
  5. Actually, you don't need the hypochlorite. You can just use the chloride (aka sodium chloride, table salt). Place two platinum electrodes inside a cup of salt water and apply electricity. Hydrogen will come off the negative electrode.
  6. Getting Na2CO3 from baking soda is easy. Simply put the soda into a tin can and place it over high heat. After a couple minutes it will start to "bubble" (It almost looks like blowing air through a layer of sand). When it stops bubbling, it's done. On the other hand, getting Na2CO3 to break down into Na2O and CO2 is very, very hard. However you can make NaOH from Na2CO3. Go to a grocery store and look for "pickling lime." This is Ca(OH)2. (I suggest Mrs. Wages brand because it contains only Ca(OH)2). It's probably around $3-4 dollars for a pound. Make a saturated solution of it and a saturated solution of Na2CO3. When you mix them together, CaCO3 will precipitate and NaOH will remain in solution. Use a coffee filter to seperate out any CaCO3. Na2CO3 + Ca(OH)2 --> 2NaOH + CaCO3 Melvin
  7. I would use oyster shells instead of egg shells for CaCO3. Egg shells have various proteins and other contaminants that oyster shells don't.
  8. I often will use 3% H2O2 mixed with NaHCO3 for cleaning my teeth. Works great . I think H2O2 with conc. higher than 6% can cause burns.
  9. For anodes in electroysis, platinum is the way to go. If platinum is too costly, then graphite. Also, I've heard H2SO4 is a better electrolyte than KOH.
  10. Some percentage of water molecules have enough energy to evaporate, even below the boiling point. This percentage increases as the temperature increases. Try this: Wet a cotton ball with water. Rub some water on the palm of your hand. Wave you hand around in the air. Your hand should feel cooler as the water evaporates off your skin. Also, try it again with rubbing alcohol (isopropanol) on one side of your hand and water on the other. The alcohol side should feel cooler faster because alcohol is more volatile (evaporates easier). Melvin
  11. The method for the lead you have is good. The carbon will seperate lead from the oxide. Also, lead melts at 327 celsius, so it would be easy to seperate at 360 celsius. I'm not sure about copper. I don't really know a whole lot about extracting metals
  12. YT, what would you use as the other electrode if one is zinc? Copper?
  13. Very nice Hoffman Voltameter YT I remember the first time I made hydrogen from water. I was probably eleven and didn't know a whole lot about chemistry. I used copper for electrodes, which didn't turn out too well. I also used plain water, since I didn't know anything about electrolytes. However, I was satisfied with a a tiny "poof" made by a tiny bubble of hydrogen YT, are the SS wires bent into a corkscrew in the picture?
  14. Maybe an uneconomic, unsafe hand warmer:-) Would make some useful H2 though.
  15. This just might work for getting the iron out. I would remove lead and copper first, though: First, you would need to seperate the iron metal from the oxides/sulfides in the mix. Heating sulfides in air give you an oxide and SO2: 4FeS + 7O2 --> 2Fe2O3 + 4SO2 4FeS2 + 11O2 --> 2Fe2O3 + 8SO2 Heating the oxides with carbon give you the metal: Fe2O3 + 3C --> 2Fe + 3CO Heating the iron in CO gives you the volatile liquid iron carbonyl: Fe + 5CO --> Fe(CO)5 At 250 celsius, the iron carbonyl (in a gaseous state) breaks down: Fe(CO)5 --> Fe + 5CO I would do research on this as I'm not really sure if it will work:-) If I'm wrong, please somebody tell me.
  16. That is kinda scary! But, you have to remember that your very own stomach contains HCl, which is much stronger than the H2CO3 in soft drinks. I assume that aluminum corroded by soft drinks is aluminum carbonate?
  17. I would take a piece of Al can and a piece of Al foil. Add equal amounts of iodine tincture to each, then light. Compare the two when finished:-)
  18. NaHCO3 + CH3COOH --> CH3COONa + H2O + CO2 1 mole of baking soda will react with one mole of acetic acid. Look on your vinegar bottle, as it should have something that says "% acid" or something like that. You would need to calculate how much vinegar will give you one mole of acetic acid. One mole of acetic acid is 60 grams, and one mole of NaHCO3 is 84 grams.
  19. It depends on what the gases are. If the SO2 is mixed with something like CO2, oxygen, nitrogen, or any of the noble gases, then no problems should arise. If it's something like NO2, H2S, HF, HCl, etc. then you might get contaminated acid.
  20. If you want to make H2SO4, you need SO2. Unless, of course, you electroylzed CuSO4 solution (I would think the product would be contaminated, though).
  21. I probably forgot to double the molar mass of oxygen. Those are the kinds of stupid mistakes I make. I was simply trying to get vampares to see that burning sulfur is a good way to make SO2.
  22. Well, if you used zinc for both electrodes, wouldn't they just cancel each other out?
  23. Burning sulfur is a good way to make SO2! One pound of sulfur will give you 1.5 pounds of SO2! In the contact process (industrial process for making H2SO4) the SO2 comes from either sulfur or sulfide ores!
  24. Both of the plates can't be lead, dom3mo. One is lead, but the other is lead dioxide. Just buy a car battery!
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