Ví dụ về việc sử dụng Alkali metal trong Tiếng anh và bản dịch của chúng sang Tiếng việt
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Nitrocresols and their alkali metal salts.
As a hydride of an alkali metal, it is reactive towards even weak oxidizing agents.
(6)Acid and alkali resistance(except molten alkali metals).
Superoxides form salts with alkali metals and alkaline earth metals. .
Cesium is the least abundant of the five non-radioactive alkali metals.
Potassium perchlorate has the lowest solubility of any alkali metal perchlorate(1.5 g in 100 ml of water at 25 °C).
Caesium hydride or cesium hydride(CsH) is a compound of caesium and hydrogen.It is an alkali metal hydride.
High speed camera imaging of alkali metals exploding in water has suggested the explosion is a coulomb explosion.[3][4].
It should be kept separately from oxidants, acids, alkali metals and so on.
Alkali metals: The alkali metals make up Group 1 of the table, and comprise lithium(Li) through francium(Fr).
In special cases of extremely reactive materials(e.g. rare-earths, alkali metals), isopropyl alcohol is not recommended.
Sodium makes up about 2.6% by weight of the Earth's crust, making it the sixth most abundant element overall[1]and the most abundant alkali metal.
It has the formula RbH and is an alkali metal hydride. It is synthesized using rubidiummetal to react with hydrogen gas.
To make niobate, niobium pentoxide can be dissolved in an alkaline hydroxide solution ormelted in an alkali metal oxide.
The disulfuric acid, which appears to be more widely used as its alkali metal salts, has the structure HO- S(O)2- O- O- S(O)2- OH.
By chance, they discovered that alkali metal ions like sodium or potassium can activate fine platinum particles when they are adsorbed on alumina or silica.
IC also covers the determination of carbohydrates, organic acids,chloride and sulfate, alkali metals and alkaline earth metals as well as antioxidants.
However, the Birch reduction is dangerous because the alkali metal and ammonia are both extremely reactive, and the temperature of liquid ammonia makes it susceptible to explosive boiling when reactants are added.
Researchers at the U.S. Department of Energy's AmesLaboratory have found a way to create alkali metal hydrides without the use of solvents or catalysts.
The new product exhibited chemical properties of an alkali metal(such as coprecipitating with caesium salts), which led Perey to believe that it was element 87, produced by the alpha decay of actinium-227.
It also coprecipitates with silicotungstic acid, and with perchloric acid, without another alkali metal as a carrier, which provides other methods of separation.
Another way to synthesize it is to allow an alkali metal cyanide to react with oxygen in nickel containers under controlled conditions.
A mixture of calcium formate with ammonium nitrate or with chlorate, perchlorate, peroxide,superoxide or permanganate of an alkali metal will rapidly evolve large volumes of gas when ignited.
Anti chemical corrosion: It's only resistant to fluorine and alkali metal in high environment and can't work to all other strong and thin inorganic acid, alkali and ester.
Corrosion resistance: PTFE is almost free from chemical attack and can withstand all kinds of strong acids(including aqua regia),strong oxidants and reductions except molten alkali metal, fluorinated medium and sodium hydroxide above 300 °C.
However, both magnesium oxide onaluminum oxide that has been activated by alkali metal oxides and ruthenium on carbon have been employed as catalysts.
Helium-3 can be hyperpolarized using non-equilibrium means such as spin-exchange optical pumping.[31] During this process, circularly polarized infrared laser light, tuned to the appropriate wavelength,is used to excite electrons in an alkali metal, such as caesium or rubidium inside a sealed glass vessel.
Electric PTFE Fluorine lined Wafer Butterfly Valve The valve canwithstand any corrosive media other than molten alkali metal and elemental fluorine It is a gas liquid semi fluid pipeline and container for chemical petroleum pharmaceutical food iron….
Another reaction that can be used for the preparation of ethers is the Williamson ether synthesis,in which an alkoxide(produced by dissolving an alkali metal in the alcohol to be used) performs a nucleophilic substitution upon an alkyl halide.