How do you prevent hydrogen gas from leaking out of a container?
815762
rubber cement, works well
440639
to stop condensation forming on the lid and dropping into the agar
422246
In most of the cases the catalyst is insoluble and you can filter them out.\nFor hydrogentaion., Pd/H2 is one of the useful techniques.... but this catalyst will not be soluble.. its a black powder.. after hydrogenation, you can filter it off.\n \nI remembercatalysts like Raney Nickel or Raney Cobalt also will not soluble.. you need to filter them off on Celite porus plug.\n\nHope this info will help you
4788
Best method if practical is to freeze it.\nIf not sealed within a steralized container.
741237
HF, hydrofluoric acid will dissolve glass.  It is the only one I am familiar with. \nIf the products were a gas, they would leak out as a gas occupies any space you put it in.\nIf it were asolid, it would sit there.
453542
Hydrogen Peroxide will get it out.
883737
Hydrogen gas molecules, H2
247058
I had the same problem, only I was trying to make a lamp out of one. I tried everything I could think of to get the valve out. Finally I took a giant drill bit and ended up drilling the ball and housing out. Worked for me, but I don't know how you would seal it so the water don't splash out.
325235
You need to try something which dissolves oil but does not attack canvas.  Can you try a chlorinated hydrocarbon?  Carbon tet or trike might to the trick.  Try an obscure corner of the bag first though.
83207
The only thing I can think of is a fullerene cage that is trapping the Neon...hmmm\nIf you were thinking Nitrogen...try any amino acid ...umm adesonine (if thats how its spelt)
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.
1086110
your question is poorly worded but here goes. if the tank leaks down when it is not on the gun you need a new valve or the O ring that seals the valve to the tank in bad. if it leaks down when its onthe gun its either the gun or the O ring on the outside of the valve. as a general rule you should remove the tank from the gun whenever you are not using it. its safer and saves gas since most markers will leak a little over time.
131370
simple the mecanic puts the air mesuring divice on the oil or water opening and seals it then puts in air presure and then waits a bit and checks the air presure so it works like a tire gage. if the air presure goes down then it it is leaking.
464981
It’s a pressure system, using pressure the gas or oil is moved through the system, that’s why you cant have any leaks, otherwise you lose that pressure, and gas and or oil is pumped through the system properly. Also why you have an “Oil pressure” light or picture etc, on the dash, its moved by pressure, and the loss of pressure can lead to major problems.
186001
u forgot to put the foloowings to choose from...\nbut still here are some ideas for u...\nTO PREVENT RUST, KEEP METAL SURFACE DRY - OR ADD A COATING \nRust is corrosion that affects ferrous metals such as iron and steel. In many cases, water vapor must be in the air before rust can occur. With iron, for example, 40 percent humidity must be present before rust will start to occur. The best way to prevent corrosion is to keep metal surfaces dry. Isolating the metal by coating it with paint, lacquer or wax is another good way to prevent corrosion. \n\nBefore coating a metal surface, remove all traces of rust. Then apply a primer and finish with paint. It's best if the paint and primer are the same brand; they usually are formulated to work together. Metals such as brass, copper or aluminum are best protected with either wax or by spraying them with lacquer or clear varnish. \n\nRust also can attack metal in inaccessible areas. Corrosion occurs inside a home hot-water heater, for example, because the ions circulating in the water make it easy for dissolved oxygen to pull the electrons from the interior surface of the metal tank. \n\nRust that occurs in localized areas is called localized corrosion. There are three types: galvanic, crevice and pitting. \n\n- Galvanic corrosion: It occurs whenever two dissimilar metals contact each other. This creates a flow of electrons between the metals that eventually causes them to disintegrate. One way to prevent this corrosion is to replace one metal piece with another that is compatible with the mating piece.\n\nFor example, many aluminum storm doors have steel rivets holding the hinges or closing piston in place. Often, corrosion starts around these fasteners, then works to the adjacent aluminum panels. Drilling the corroded fasteners out and replacing them with aluminum pop-rivets will stop the galvanic corrosion before it spreads.\n\n- Crevice corrosion: It occurs around the joints and seams of metal fixtures where dirt accumulates. By itself the dirt is not particularly harmful, but it allows moisture to collect; this causes corrosion. Joint and seam corrosion is a common occurrence on gutters and downspouts. Clean them often to keep dirt and leaves, which retain moisture, from building up. If rust is present, remove it with a flexible sanding wheel chucked in an electric drill, then prime and paint the bare metal.\n\n- Pitting corrosion: It occurs outdoors when the wind bombards metal surfaces with minute particles of dirt, salt or sand and creates microscopic craters that retain moisture. At first, the corrosion is limited, then quickly escalates into a formidable problem. Outdoor electrical conduits, television antenna masts, metal windows and doors, and children's play equipment are a few of the items that receive constant assault from air-borne particles and are subject to pit corrosion. This type of corrosion is severe near the seashore and is most noticeable on the side of the house that faces the prevailing winds. Check exposed metal surfaces often; sand and paint them if they show signs of pitting.
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
95444
Some tips...\n--Use a strong electrolyte (substances that will break up into ions [almost] completely in solution), the higher the concentration, the better.  Also you need to be careful on which electrolyte you choose.\n--Try not to use an over volttage (a voltage over the minimum necesary to electrolisize the water.  Insread, try to use a very high current, higher current = more production of gasses.  To increase current without increasing voltage, reduce resistance.\n--Place the electrodes close together to reduce internal resistance in the cell.\n\nEven by doing these things, you cannot hope to get much better than about 50% efficency doing water electrolysis, maybe 65% if you are good.\n\nThere are yahoo groups out there devoted to just such a tast as Hydrogen production through water electrolysis (I have one infact), they can also give advice based on experience.