what is the best way to make hydrogen gas?
476725
Drop Mg or Zn or something like that in HCl.  Or use electrolysis on water, but that's a lot harder.
883737
Hydrogen gas molecules, H2
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.
134371
Although some have talked about this, there are a lot of technical and practical questions to answer before this can happen. For example:\n\nWhat energy are you going to use to separate water into oxygen and hydrogen? \n\nHow are you going to store the hydrogen safely and dispense it? \n\nHow are you going to transport the hydrogeon?\n\nWill you keep the hydrogen liquid so it will not take up much room? \n\nHow will you keep the hydrogen liquid from warming up ? \n\nHow will you prevent terrible fires and explosions from accidents?\n\nWill you produce less pollution by using hydrogen, or more, given that you are having to use energy to create it? \n\nHow will you make the transition from petrochemical fuels to hydrogen fuels?\n\nWho is going to pay for this transition?\n\nHow are you going to build the very expensive infrastructure?\n\nProbably lots more questions too. Those are enough to start with, however.
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).
435767
most common way is not through elecrolysis, but extraction from fossil fuels:  Here is a list of the ways...notice in every case a large amount of energy is input-and in most cases this energy comes from coal burning  for electricity or oil...\nHydrogen can be produced using a variety of domestic energy resources - fossil fuels, such as coal and natural gas, with carbon capture and sequestration; renewables, such as biomass, and renewable energy technologies, including solar, wind, geothermal, and hydropower; and nuclear power. Specific technologies and processes are described below.\n\nThermochemical Processes\nSteam methane reforming: In this process, high-temperature steam is used to extract hydrogen from a methane source such as natural gas. This is the most common method of producing hydrogen; about 95 percent of the hydrogen we use today in the United States is produced using this process. \nPartial oxidation: Scientists are exploring a process that produces hydrogen by simultaneously separating oxygen from air and partially oxidizing methane. \nOther thermal processes: Other processes include (1) splitting water using heat from a solar concentrator, and (2) gasifying or burning biomass (i.e., biological material, such as plants or agricultural waste) to generate a bio-oil or gas, which is then reformed to produce hydrogen. \nElectrolytic Processes\nElectrolysis: In electrolysis, electricity is used to separate water (H2O) into hydrogen and oxygen. Current electrolysis systems are very energy intensive. The challenge is to develop low cost and more energy efficient electrolysis technologies. \nPhotolytic Processes\nPhotolytic methods: In photolysis, sunlight is used to split water. Two photolytic processes are being explored: (1) photobiological methods, in which microbes, when exposed to sunlight, split water to produce hydrogen, and (2) photoelectrolysis, in which semi-conductors, when exposed to sunlight and submersed in water, generate enough electricity to produce hydrogen by splitting the water.
509750
Air is just a homogenous gas mixture, therefore you can make it if you dissolve all of the major components of air into a container. Or...you could run through millions of other experiments trying to release only certain elements in the container.
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.
530435
Get a glowing splint (piece of wood that is still burning out). \n\nPlace near the oxygen and it will glow brighter as it uses the oxygen to burn more.\n\nPlace near the hydrogen and you will hear a 'pop' sound. \n\nHope that helps! :)
686527
There are many ways to generate hydrogen outside electrolysis. Steam reforming, methane reforming, propane reforming, etc... Coastal countries may appear to have an advantage but you cannot have a fair comparison of supply and demand.  Consider the following:\n1. Many, many, many countries have access to coastal water, thus competition would be extremely fierce\n2. Countries will be more than self-sufficient and may "sell" excess product at a very low cost.\n3. Rivers, streams, rainwater etc... is available to more countries in the world than petroleum to many. \n \nI would not worry about it, depleting the sea is way way way way off, and besides, using H2 as fuel means that emission is....water. And no, the roads are not going to be slippery from algae (sorry, but I have heard a statement like that in the past)\n\nEver considered that we may come up with the technology to recover and re-use the water emission? Thus less filling up at your local Shell H2 station? \n\nI hope I was able to answer it for you in a objective manner
7610
Yeah, you can use H2S gas... Hydrogen Sulphid. With just100 parts H2S per a Million parts of Air, it will knock you out in less than a 2 seconds, stop your respiratory functions as it paralyzes your nervous system. It’s made by combining Hydrogen and Sulphur Gases together. \nWell, seeing it comes from crude oil, it is relatively easy to find and make.\nOne short note; if you do not get the person into a breathable atmosphere within 4 minutes and revive them, they will die.
17656
Best technique is to look for where it is unbalanced and change it so it is balanced. Repeat until it is balanced.\n\neg. We need 2 hydrogen here on the left, so go for:\n\nMg + 2HCl -> MgCl + H2\n\nNow we need another 2 as we have 2 Cl on the left and one of the right.\n\nMg + 2HCl -> 2MgCl + H2\n\nNow we need to have 2 Mg on the left as we have 2 Mg on the right. So we get:\n\n2Mg + 2HCl -> 2MgCl + H2\n\nAll balanced so that is the answer.
324432
Quick summery:\n\nFusion produces energy by taking very light elements, like hydorgen, and combining them together to form heavier ones like helium.  4H -> 1He.  If you take a look at the mass of 4 hydrogen atoms you will find that they have more mass than 1 helium atom.  This extra mass is converted into energy in fusion (E = mc^2).\n\nNow this produces a ton of energy (it is what powers the sun), but you need extream conditions (high temperature and pressure) to do it.  In order to make a hydrogen bomb, that is a bomb that uses fusion to generate the energy to do its dirty work, we need a source of intense heat.\n\nThat is why typically we trigger our hydrogen bombs with a small atomic bomb.  An atomic bomb generates energy through breaking large elements (uranium) into lighter ones.  Just like fusion, there is a mass difference between what you start with, and what you end with.  That missing mass goes into eneregy.  Fission is easy to strat, just get enough fissionable material together and presto.\n\nSo, you use the energy/heat produced by the little atomic bomb to super-heat your fusion fuel (hydrogen isotopes), and bang -> hydrogen bomb.\n\nTo be specific it is actually a three-stage detonation.  You use a conventional bomb to set off the fission (atomic) bomb, which in turn sets off the fusion (hydrogen) bomb.
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
230263
It isn't impossible\nIt just takes more energy to split the molecule than you get out of forming it.\nIf you used a virtually free energy source like fission,\nit would be plausible to have hydrogen powered cars.\n\nHydrogen is not compressible to a liquid at normal temperature.\nSo you have a high pressure explosive gas, which also has the second highest rate of diffusion of any gas.(leaks)\nThis is also problematic.
732233
Producing hydrogen electrolytically.  A very current topic and of interest to all persons paying for gasoline.
81567
Yes, you can make methane gas from any decomposing organinc material.  With methane gas you can generate power, fuel cars, etc.  We should be making lots of it.