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Ruthenium (Ru) balls
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Is aqua an element or compound?
Aqua, by common meaning is water, owing to the meaning of the original Latin word; however in a chemistry context aqua is also a colloquialism for Aqua Regia. In the first case aqua is a compound, while in the second it is a mixture of ionized acids. Water is a compound of Hydrogen and Oxygen covalently bonded with a chemical formula of H2O. Aqua Regia is entirely more complex, however suffice to say it is a mixture of concentrated Nitric and Hydrochloric acids, with are ions in solution as both being strong acids they ionized completely.
What is the chemical formula of aqua-regia?
A mixture (acid) of HCl and HNO3. Formed by mixing 3 moles of HCl and 1 mole of HNO3 i.e in the ratio 3:1. This is one of the few acids that can dissolve metals like gold and platinum. FIrst discovered by the famous Muslim scientist Jabir-bin-Haiyan(known as the father of chemistry). It is a highly-corrosive fuming yellow liquid. The name "Aqua Regia" is latin for "Royal Water". It was so named because it could dissolve the royal noble metals.Aqua regia works to dissolve gold, even though neither constituent acid will do so alone because, in combination, each acid performs a different task. Nitric acid is a powerful oxidizer, which will actually dissolve a tiny (virtually undetectable) amount of gold, forming gold ions. The hydrochloric acid provides a ready supply of chloride ions, which react with the latter, thus taking the gold out of the solution. This allows further oxidation of gold to take place, and so the gold is dissolved.
What transition metal has a white precipitate when reacted with sodium hydroxide?
unobtainium -------------------------------------------- That is highly dependent on the cluster size of the transition metal. For example: a) Dissolve gold in aqua regia, this will create gold clusters of some hundred to some thousand gold atoms. If you precipitate it with NaOh the precipitate is brown. b) Dissolve gold in aqua regia, get rid of the nitric acid by repeated evaporation with HCl - Boil the solution a long time in HCl - You will end up with Au2Cl6 - This will form a orangish red precipitate... c) Dissolve gold in aqua regia, get rid of the nitric acid by repeated evaporation with HCl - Boil the solution a long time in HCl and NaCl (1 mol of gold to 20 mol of NaCl) - The color of the gold clorid will turn green and you will end up with NaAuCl3 - Use nitric acid to get rid of the clorid - you end up with NaAu - raise the ph to exact 7 (with NaOH)and you will end up with HAu which forms a white precipitate - anneal the HAu ander innert gas to get pure monoatomic Au a white powder. Fazit: the world of microclusters is strange...
What is the importance of iridium metal?
Well, it is extremely corrosion resistant (resistant to all acids, including aqua regia), and basically is only broken down by molten salts (NaCl, NaCN, etc). It is also possibly the densest element known (Ir and Os are controversial due to lattice structures). Most interesting fact is that it is quite a rare element on earth, but very abundant in asteroids and meteors. The "Ir Spike" at the K-T boundary is evidence that a meteor collision with earth is what cause the dinosaurs (and many other species) to become extinct. Hope this helps.
What does Platinum react with?
Not that many. It is wonderfully resistant to most stuff, including oxidation in air. That's why it's a good choice for making jewelry. It can be corroded by caustic alkalis, cyanides, halogens and sulfur, and it is soluble in aqua regia. Platinum can act as a catalyst in a number of situations. The most popular one is as the active element in automobile catalytic converters. Wikipedia has additional information, and a link is provided.
Which of material is resistant to boiling aqua regia?
Silver can be resistant to boiling aqua regia due to formation of silver chloride.
Why gold is corrosion resistant?
It is chemically inert and found in nature. It can be dissolved in aqua regia and Fluorine will also react with it though.
Where can you buy aqua regia in Pakistan?
Aqua regia may be obtained from scientific stores .
Why gold is resistant to corrosion?
It is chemically inert and found in nature. It can be dissolved in aqua regia and Fluorine will also react with it though.
How much quantity need of aqua regia to dissolve 5000gms of gold?
A cup of aqua regia
What is the solvent of aqua regia?
Aqua regia is a mixture of HNO3 and HCl in 1:3 so solvent is water.
How do you dissovle gold?
Aqua Regia will dissolve gold. Aqua Regia is a mixture of Nitric acid and Hydrochloric acid.
How do you mix palladium metal and aqua regia to make palladium chloride?
Dissolving palladium (in powder form) in aqua regia (with some chlorine bubbling). Note that aqua regia is very corrosive and dangerous.
What is the solute of aqua-regia?
Aqua regia ia mixture of HCl and HNO3. The expression solute/solvent in this case is not adequate.
Does aqua regia dissolve diamond?
No. Aqua regia is used to dissolve noble metals: gold and platinum. It does not affect diamond.
Will Aqua regia dissolve quartz rock to recover gold?
Aqua regia will dissolve gold. It will not dissolve quartz rock.
Chemical composition for Aqua regia?
aqua regia is a solution of nitric acid+hydrochloric acid. ratio is 3:1.
