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I am preparing a science project, and I am missing a few security mesures to take when handling Gold? Can anyone Help?
I dont think you have to take precautions about handeling gold solid though. Its a very stable element and I hear they use it in jewlery dont you think its pretty safe to wear jewelry.
if you need more information about this element check webelemets.com
In addition to its use in jewelry, gold is used in dental fillings because of its inertness. Gold is a noble metal, ie it doesn't readily enter into chemical reactions. Like platinum it is sometimes used for non-reactive labware. However, some precautions should be observed. Gold is attacked famously by aqua regia (HNO3 + HCl). In fact free chlorine in an aqueous solution will dissolve it; an old lab demonstration was to suspend Au foil in an atmosphere of dry Cl and then add a drop of H20, which instantly caused the Au to dissolve. Fused alkalies and KCN solutions also attack Au. The metal is also soluble in Hg, so don't wear your Au jewelry when you swim in mercury.
i'm new to the forum and only a amateur but got some imagination and thought how to make GOLD was dicussed here :) i understand it splits / dissolves. still by building / fusing the rite amount of electrons, pro and neutrons theoriticaly we should be able to make GOLD as well someday?
my real question: we have a boat using lots of gas. although funding and hydrogen infrastructure may not be completely ready, for ships (and boats) that travel on water (hydrogen / oxigen fuel) it seems starnge to me it is not used to propel them. check the PEM fuel cells demo: [url]http://www.ballard.com/tD.asp?pgid=20&dbid=0[/url] yet other way's to produce and use water energy are possible as well.
Hydrogen and oxygen will burn to form water if in an appropriate mixture. Pure hydrogen by itself and pure oxygen by itself will not burn (hydrogen needs an oxidizer and oxygen needs a reductant). Water (H2O) is a stable chemical compound that does not have the characteristics of the elements that make up its composition (hydrogen and oxygen). This is true of most chemical compounds. Hydrogen has the highest energy content per unit weight of any known fuel-52,000 Btu/lb (120.7 kJ/g). It burns cleanly. When hydrogen is burned with oxygen, the only byproducts are heat and water. When burned with air, which is about 68% nitrogen, some oxides of nitrogen are formed. The ultimate source of hydrogen is water. when producing hydrogen, we would also produce oxygen, which would both be consumed in the same ratio as produced. So there would be no depletion of oxygen from the atmosphere. Electrolysis does not require significant amounts of water. The hydrogen extracted from a gallon of water using a hydrogen generator could drive a hydrogen fuel cell vehicle as far as gasoline vehicles travel today on a gallon of gasoline. The energy required to produce hydrogen via electrolysis (assuming 1.23 V) is about 32.9 kW-hr/kg. For 1 mole (2 g) of hydrogen the energy is about 0.0660 kW-hr/mole. Because a Watt is Voltage x Current, this is equivalent to Power x Rate x Time. The power in this case is the voltage required to split water into hydrogen and oxygen (1.23 V at 25?C). The rate is the current flow and relates directly to how fast hydrogen is produced. Time, of course, is how long the reaction runs. It turns out that voltage and current flow are interrelated. To run the water splitting reaction at a higher rate (generating more hydrogen in a given time), more voltage must be applied similar to pushing down on the accelerator of a car; more gas is used to make the car go faster. Lowering the voltage for electrolysis, which will increase the energy efficiency of the process, is an important area for research. 60 cents the litre? looked at the tokamac [url]http://ippex.pppl.gov/temp/tokamak/tokamaknew.htm[/url] wonder about the missing neutron in hydrogen, got lost in neutrino's and started some experiments with a electrolised coupled double kipp aparatus but maybe someone here can make better sence?
got parts of the text from the net and hope i'm understandable?
Gold was made by bombardment of Helium on lead. It was done by Glenn Seaborg.
Guests are allowed to post here?
[quote="yipster"][quote][i]Gold was made by bombardment of Helium on lead. It was done by Glenn Seaborg.[/i]
probably the most expensive gold, and wow, so that is really done! :o[/quote]
[quote][i]Guests are allowed to post here?[/i]
i registered and you can can find me on the memberlist. :D
if you mean to say i'm not active in this field than yes, but whats wrong with that?[/quote]
H and O forms steam at 3000 celcius but i read also about thermal spitting below that heat? :roll:
not a normal question i know but i'm really curious about water. any info, links, reaction(s)?[/quote]
an electrolysis of water should split the bonds at a much lower temperature.
found a interesting pure water atomizing study at http://www.powerlabs.org/waterarc.htm
can the light and pulsewave possibly be coused by neutrino's i wonder?
still fantasizing a steam boat propulsion, maybe pulsejet http://www.galcit.caltech.edu/EDL/projects/pde/f950sm.mpg
would be nice on H+O, just to get it economicly :(
than this may be a interesting article bout super cavitating evidence that bubbles over to support tabletop nuclear fusion. it also mentions the light phenomenon above known as "sonoluminescence" http://www.spacedaily.com/news/energy-tech-04o.html
WebElements: the periodic table on the WWW [http://www.webelements.com/]