- 関
- tungstate
WordNet
- a salt of tungstic acid
- street name for lysergic acid diethylamide (同)back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen
- any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
- having the characteristics of an acid; "an acid reaction"
PrepTutorEJDIC
- 酸性の / 酸味のある,すっぱい(sour) / (言葉・態度などが)厳しい,しんらつな / 酸 / すっぱいもの / 《俗》=LSD
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2014/09/29 09:32:43」(JST)
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Tungstic acid |
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Identifiers |
CAS number |
7783-03-1 Y |
PubChem |
1152 |
EC number |
231-975-2 |
RTECS number |
YO7840000 |
Jmol-3D images |
Image 1 |
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InChI=1S/2H2O.2O.W/h2*1H2;;;/q;;;;+2/p-2
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Properties |
Molecular formula |
H2WO4 |
Molar mass |
249.853 g/mol |
Appearance |
yellow powder |
Density |
5.59 g/cm3 |
Melting point |
100 °C (decomp) |
Boiling point |
1,473 °C (2,683 °F; 1,746 K) |
Solubility in water |
insoluble |
Solubility |
soluble in HF, ammonia |
Hazards |
NFPA 704 |
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) |
Y (verify) (what is: Y/N?) |
Infobox references |
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Tungstic acid refers to hydrated forms of tungsten trioxide, WO3. The simplest form, the monohydrate, is WO3·H2O, the dihydrate WO3·2H2O is also known. The solid state structure of WO3·H2O consists of layers of octahedrally coordinated WO5(H2O) units where 4 vertices are shared.[1] the dihydrate has the same layer structure with the extra H2O molecule intercalated between the layers.[1] The monohydrate is a yellow solid and insoluble in water. The classical name for this acid is 'acid of wolfram'.
The acid was discovered for the first time by Carl Wilhelm Scheele in 1781.
Preparation
Tungstic acid is obtained by the action of strong acids on solutions of alkali metallic tungstates. It may also be prepared from the reaction between hydrogen carbonate and sodium tungstate.
Uses
It is used as a mordant and a dye in textiles.
References
- ^ a b Wells, A.F. (1986). Structural inorganic chemistry (5th ed. ed.). Oxford [Oxfordshire]: Clarendon Press. ISBN 0-19-855370-6.
Tungsten compounds
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Tungsten(0) |
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Tungsten(II) |
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Tungsten(III) |
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Tungsten(IV) |
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Tungsten(V) |
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Tungsten(VI) |
- H3PW12O40
- WO2Cl2
- WCl6
- WF6
- WN2
- WO3
- WS3
- WOBr4
- WOCl4
- WOF4
- H2WO4
Organotungsten(VI) compounds
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UpToDate Contents
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English Journal
- Selective photocatalytic oxidation of alcohols to aldehydes in water by TiO2 partially coated with WO3.
- Tsukamoto D, Ikeda M, Shiraishi Y, Hara T, Ichikuni N, Tanaka S, Hirai T.SourceResearch Center for Solar Energy Chemistry and Division of Chemical Engineering, Graduate School of Engineering Science, Osaka University, Toyonaka, Japan.
- Chemistry (Weinheim an der Bergstrasse, Germany).Chemistry.2011 Aug 22;17(35):9816-24. doi: 10.1002/chem.201100166. Epub 2011 Jul 6.
- Semiconductor TiO(2) particles loaded with WO(3) (WO(3)/TiO(2)), synthesized by impregnation of tungstic acid followed by calcination, were used for photocatalytic oxidation of alcohols in water with molecular oxygen under irradiation at λ>350 nm. The WO(3)/TiO(2) catalysts promote selective o
- PMID 21735494
- Borotungstate polyoxometalates: multinuclear NMR structural characterization and conversions in solutions.
- Maksimovskaya RI, Maksimov GM.SourceBoreskov Institute of Catalysis, Lavrentiev av. 5, Novosibirsk 630090, Russia. rimax@catalysis.ru
- Inorganic chemistry.Inorg Chem.2011 Jun 6;50(11):4725-31. Epub 2011 Apr 28.
- The unique heteropolyanion [H(3)BW(13)O(46)](8-) (BW(13)), previously suggested on the basis of indirect evidence, and protonated lacunary heteropolyanion [HBW(11)O(39)](8-) (BW(11)) have been identified in aqueous solutions at pH 5-7.5 from NMR spectra. The pattern of tungsten-tungsten connectiviti
- PMID 21526755
Japanese Journal
- Chemical processes employing inorganic layered compounds for inorganic and inorganic–organic hybrid materials
- Journal of the Ceramic Society of Japan 122(1427), 523-529, 2014
- … The focus is placed on three topics: preparation of new ion-exchangeable layered perovskites and a tungstic acid from Aurivillius phases via selective leaching of bismuth oxide sheets; …
- NAID 130004950971
- New processing method for tungsten carbide nano-crystalline particles and nano structural carbon via polyacrylonitrile gasification
- , , ,
- Journal of the Ceramic Society of Japan 122(1427), 570-573, 2014
- … Starting materials for WC synthesis were selected tungstic acid (H2WO4) and polyacrylonitrile (PAN) powders. …
- NAID 130004950963
- Improvement of the Photochromic Properties of WO3-Based Composite Films by Phosphorus Addition
- , , ,
- Bulletin of the Chemical Society of Japan 87(7), 838-841, 2014
- … Phosphorus tungstic heteropolyacid was synthesized by mixing P2O5 and peroxoisopolytungstic acid (W-IPA) in methanol solution. … WO3-based composite films fabricated from phosphorus tungstic heteropolyacid and transparent urethane resin showed reversible photochromic properties. …
- NAID 130004059130
Related Links
- Tungstic-acid definition, a hydrate of tungsten trioxide, H 2 WO 4 ⋅H 2 O, used in the manufacture of tungsten-lamp filaments. See more. Dictionary.com Word of the Day Translate Games Blog Thesaurus.com Apps Favorites ...
- Sigma-Aldrich offers Aldrich-223328, Tungstic acid for your research needs. Find product specific information including CAS, MSDS, protocols and references. ... Technical Service: Our team of scientists has experience in all areas ...
Related Pictures
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★リンクテーブル★
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タングステン酸、(化合物)ングステン酸塩
- 関
- tungstic acid
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- 英
- tungstic acid、tungstate
- 関
- タングステン酸塩
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リンタングステン酸法
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リンタングステン酸