Can create Hydrogen in Lab?
536199
follow the above.. to get gas.. electrolysis is the safest bet\n\nbut if you want to have fun???\n\nput some soap in the water and stir it around before you put the electrodes, this creates hydrogen bubbles that float and when put next to fire make a sweet pop sound.. do it safely, in a lab\n\nits a good demo for a highschool chem class
401900
you would have to find the hydrogen somewhere.
585397
i built a simple one using seveal pairs of stainless steel knives and caning jars. It wasnt feasable for practical use, but it was a good demonstration of fuel cell theory. I used solution of water and baking soda. \nThe stainless steel knives were used because stainless steel contains nickle which is a catylyst for the full cell process. (platnuium is much better catylyst, but much more expensuve.) I combined the cells in seriese and ran a curent over them until bubles apear on the knives and then removed the current.\nNext i put a led light over the leads of the cells, and then it lit for about 5 seconds as it absorbed the hydrogen and converted it to electricity.\nIt operated similar to a capisitor in this setup.
405671
I assume you mean electrolysis?  I don't know the exact ratio of energy out to energy in, but I do know that it's not very efficient.  There will be a lot of lost energy.  What kind of H2 on demand system?  Are you trying to run an automobile?  If so, you'd need more than about 10 kilowatts of electricity.  Might as well just build an electric car if you have that much electricity to waste.
1073622
The cheapest source of course is water, but getting hydrogen from water is expensive. Other sources of hydrogen induce\nsodium borohydride NaBH4, in which then added to water is will give out hydrogen gas.
1172901
I'm actually doing research into that right now.  Using water as the hydrogen storage medium is not viable because it requires more energy to split the hydrogen and water than is captured by bringing them back together in a fuel cell.  There are other storage mediums that do not require energy to remove the hydrogen.  The specific medium I am experimenting with is called Sodium Borohydride, NaBH4.  It reacts with water and a metal to produce 4 moles of hydrogen which can then be used in a fuel cell.\n\nThe technology for commercially usable fuel cells will be here sooner than you realize.
593822
First, suspend 2 test tubes full of water upside-down in a beaker filled with water (be careful not to let any air get in the test tube). Second, put a copper wire into each test tube and have it run over the side of the beaker (make sure the copper wire doesn't touch the bottom of the beaker). Finally, attach one copper wire to the positive side of a 9-volt battery and the other wire to the negative side and let it sit overnight. The test tube that has the most gas is the one with hydrogen gas and the other one has oxygen gas.
747984
NO, All helium produced is done so through seperating it from air where it occurs naturally, but in very small concentrations. Air is seperated through cryogenic distallation. Unless you have some extraordinary equipment in your house, you will not be able to perform this kind of operation.
645274
At standard temperature and pressure hydrogen is a colorless, odorless, nonmetallic, univalent, tasteless, highly flammable diatomic gas. Hydrogen is the lightest and most abundant element in the universe. It is present in water, nearly all organic compounds and in all living organisms. Hydrogen is able to react chemically with most other elements. Stars in their main sequence are overwhelmingly composed of hydrogen in its plasma state. The element is currently used primarily in fossil fuel upgrading. Other uses include as a lifting gas, as an alternative fuel (see Hydrogen economy), and more recently as a power source in fuel cells.\nHydrogen can be prepared in several different ways but the economically most important processes involve removal of hydrogen from hydrocarbons. Commercial bulk hydrogen is usually produced by the steam reforming of natural gas. At high temperatures (700–1100 °C), steam (water vapor) reacts with methane to yield carbon monoxide and H2.\n\nCH4 + H2O → CO + 3 H2 \nThis reaction is favored at low pressures but is nonetheless conducted at high pressures (20 atm) since high pressure H2 is the most marketable product. One of the many complications to this very optimized technology is the formation of coke or carbon:\n\nCH4 → C + 2 H2 \nConsequently, steam reforming typically employs an excess of H2O.\n\nAdditional hydrogen from steam reforming can be recovered from the carbon monoxide through the Water gas shift reaction:\n\nCO + H2O → CO2 + H2 \nOther important methods for H2 production include partial oxidation of hydrocarbons:\n\nCH4 + 0.5 O2 → CO + 2 H2 \nand water electrolysis.\n\nIn the laboratory, H2 can be generated by treatment of many metals with acids or base.\n\nZn + 2 H+ → Zn2+ + H2 \n2 Al + 6 H2O → 2 Al(OH)3 + 3 H2 \n\n\n\nA hydrogen economy is a hypothetical future economy in which the primary form of stored energy for mobile applications and load balancing is hydrogen (H2). In particular hydrogen is proposed as a fuel to replace the gasoline and diesel fuels currently used in automobiles.\n\nHydrogen production is a large and growing industry. Globally, about 50 million metric tons of hydrogen were produced in 2004; the growth rate is about 10% per year. The energy in the current flow corresponds to about 200 gigawatts. Within the U.S., production was about 11 million metric tons, or 48 GW (10.8% of the average U.S. total electric production of 442 GW in 2003). Because hydrogen storage and transport are so expensive, most hydrogen is currently produced locally, and used immediately, generally by the same company producing it. As of 2005, the economic value of all hydrogen produced is about $135 billion per year.\n\nCurrently, hydrogen production is 48% from natural gas, 30% from oil, and 18% from coal; water electrolysis accounts for only 4%.\n\nThere are two primary uses for hydrogen today. About half is used to produce ammonia (NH3) via the Haber process, which is then primarily used directly or indirectly as fertilizer. The other half of current hydrogen production is used to convert heavy petroleum sources into lighter fractions suitable for use as fuels. This latter process is known as hydrocracking. Because the world population and the intensive agriculture used to support it are both growing, ammonia demand is growing. Hydrocracking represents an even larger growth area, as rising oil prices encourage oil companies to extract poorer source material, such as tar sands and oil shale.\n\nStorage is the main technological problem of a viable hydrogen economy. Some attention has been given to the role of hydrogen to provide grid energy storage for unpredictable energy sources, like wind power. The primary difficulty with using hydrogen for grid energy storage is that converting power to hydrogen and back is not cheap.\n\nHydrocarbons are stored extensively at the point of use, be it in the gasoline tanks of automobiles or propane tanks hung on the side of barbecue grills
61416
Yes you could. Free hydrogen (H2) is rare in the atmosphere though, so you would have to buy industrially obtained hydrogen (which mostly comes from natural gas) which is expensive so its always cheaper to drill a water well or something. But yes, if you want to combine oxygen and hydrogen, and light it with a match, you will get water. Good luck trying to contain it after it goes from gas to the combustion product of hydrogen and oxygen, which will be water vapor (steam).
1115125
Using two or three standard cylinders of helium mixed with air or CO2 as a tracer gas the generator can be tested, repaired and re-tested prior to being filled with hydrogen for operation.\n\nLeak testing of operational generators is easily accomplished using one a hydrogen detector. This test is performed in the same manner as the helium test and provides similar test sensitivity.
51965
Hmm...  If I remember the physics right, it goes like this: Take two parts hydrogen and one part oxygen and mix them in a chamber with a catalyst and a proton exchange membrane and you get water and electricity.
103404
Just how much Hydrogen do you want to produce?\nI could tell you several ways to make small amounts for next to no cost, but if you want to step up production, it will involve increase the price too.\n\nElectrolysis of water is probably the cheapest method, especially when the energy your using is cheap/free too.  The cheaper the energy, the cheaper the over all price.  The energy from a battery is much more expensive than the energy "out of the wall" which is much more expensive than energy from the sun (free).\n\nYou could also produce Hydrogen by reacting a more active metal in an acid.  Metals like Iron, Zinc, Magnesium, (you could use the Alkili metals, but I woulnt advise it), ...\nCopper (in a penny) wouldnt work since it is less active than Hydrogen, but the zinc inside the penny would. [we ignore the cost of the penny you have to destroy]
1158356
By itself, water is an unreactive substance by nature. So you cannot separate oxygen and hydrogen from the water molecules. However, there is only one ay in hich this canbe done: electrolysis.\n\nIt involves the passage of an electric current into a liquid, which naturally conducts electricity. Electrodes are used to pass the electric current. At both the electrodes, gases are evolved, depending upon the liquid.\n\nSome acid or alkali should be added to water for the evolution of gases, namely hydogen and oxygen at the electrodes.\n\n\n\nIt can be mass-produced, but the process is too costly. An application could be to use hydrogen in hydrogen powered cars to replace the more polluting petrol powered cars. \n\nMoreover, oxygen is also obtained by the fractional distillation of liquid air. It involves cooling air by decreasing the its pressure by placing them in special containers, capable of bearing atmospheric pressure. This process is more economical, compared to electrolysis. Liquid oxygen and hydrogen is used to power rockets in order to propel them into space. This process for the production of liquid oxygen and hydrogen is mass produced nowadays to power rocket and hydrogen powered cars. \n\nThanks
991204
by splitting water molecules and collecting the H
415884
Check this link:\n\nhttp://72.14.203.104/search?q=cache:Hb_4_LKfVd4J:www.hydrogen.energy.gov/pdfs/progress05/vi_b_1_wu.pdf+how+to+make+sodium+borohydride%3F&hl=en&gl=in&ct=clnk&cd=7&client=firefox-a
575266
The catalytic converter in your car already does that. It uses some special transition metal catalysts to break NOx compounds into N2 and O2. (remember that once you boil HNO3, it's largely H2O and N2O5)\n\nIf you have HNO3 fumes in the lab, you can bubble the exhaust through a NaOH solution. The HNO3 will react with the NaOH to give NaNO3, which isn't volatile. While this really isn't practical on the commercial scale, it can be very handy in the lab when you are running a reaction that produces a volatile acide like HNO3.