Exemplos de uso de Tungstic em Inglês e suas traduções para o Português
{-}
-
Colloquial
-
Official
-
Medicine
-
Financial
-
Ecclesiastic
-
Ecclesiastic
-
Computer
-
Official/political
Tungstic acid refers to hydrated forms of tungsten trioxide, WO3.
Tungstate radical is free ion in tungstic acid and tungstate solution.
By that tungstic acid is precipitated, and afterwards filtered, washed and dried.
HTK 1200- In-situ dehydration experiments on crystalline tungstic acids Application Reports en.
Phosphatic tungstic vanadic acid is a yellow complex, it isn't sold in the market.
The filtration is then dealed by purification, concentration,crystallization to obtain tungstic acid.
Tungstic acid(H2WO4) is used only for selected metal grades.
Sodium tungstate is the raw material of manufacturing metal tungsten, tungstic acid and tungstate salts;
Tungstate radical in tungstic acid solution often appears in form of WO42.
The filtration is dealed by purification, concentration, crystallization,dehydration to obtain tungstic acid.
By that tungstic acid is precipitated, and afterwards filtered, washed and dried.
In 1783, José andFausto Elhuyar found an acid made from wolframite that was identical to tungstic acid.
Sodium tungstate reacts with nitric acid to get tungstic acid and sodium nitrate, following is the equation.
Research indicates that an aqueous solution of inorganic acid andalkali metal tungstate can obtain tungstic acid.
Raw material such as WO3 derived from tungstic acid or low-temperature calcined WO3 from APT(via AMT) can be used.
Hydrochloric acid is the most suitable inorganic acid for reaction with sodium tungstate to prepare tungstic acid, and the equation is.
Raw material such as WO3 derived from tungstic acid or low-temperature calcined WO3 from APT(via AMT) can be used.
When concentrate reaches in a certain range, WO3 precipitation will be separated out from strong acidity solution,which is tungstic acid.
Use gallic acid as reference substance, phosphomolybdium tungstic acid colorimetric method to test tannin content.
Crystalline Method 1. Heat tungstic acid for 4h in 20% sodium tungstate solution, then keep it under 30~40℃ and keep mixing all the time.
Catalyst production usually starts with the highly water soluble ammonium metatungstate, tungstic acid or ammonium paratungstate.
Then clean and precipitate tungstic acid for several times, dissolve it in sodium hydroxide acid, separate out and crystallize it.
Applications Ammonium Paratungstate is used as a laboratory reagent oras a source for high-purity tungstic acid, tungsten metal powder, or carbide.
Tungstic acid the most important intermediate in former tungsten chemistry, is today exclusively manufactured out of APT, in order to make use of the high pirity APT level.
CaWO4, or scheelite,is allowed to react with HCl to produce tungstic acid, which decomposes to WO3 and water at high temperatures.
The strong competition with phosphate at low pH could only be simulated when one of these complexes was fully protonated,equivalent to adsorbed molybdic or tungstic acid.
In 1781, Carl Wilhelm Scheele discovered that a new acid, tungstic acid, could be made from scheelite at the time named tungsten.
Tungstic acid the most important intermediate in former tungsten chemistry, is today exclusively manufactured out of APT, in order to make use of the high pirity APT level.
Tungsten chemicals derived from sodium or ammonium tungstate,tungsten oxides or tungstic acid have a widespread pallette of applications.