钨酸钠

钨酸钠
IUPAC名
Sodium tungstate
别名 钨酸钠
正钨酸钠
钨酸二钠
识别
CAS号 13472-45-2  checkY
10213-10-2（二水合钨酸钠）
PubChem 165917
InChI
 
  • 1S/2Na.4O.W/q2*+1;;;2*-1;
RTECS YO7875000
性质
化学式 Na2O4W
摩尔质量 293.82 g·mol−1
外观 白色菱形晶体
密度 4.179 g/cm3
3.23 g/cm3[1](二水物)
熔点 698°C
溶解性（水） 74.2 g/100 mL[2]
危险性
欧盟分类 有害（Xn）
致死量或浓度：
LD50（中位剂量）
 1190 mg·kg−1 (大鼠经口)[1]
若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

钨酸钠，化学式Na2WO4，一般为二水合物（Na2WO4·2H2O）的形式。

制备

由三氧化钨与氢氧化钠溶液反应，再经蒸發结晶、离心脱水、干燥，得到成品。

物理性质

无色结晶或白色斜方结晶。溶于水，水溶液呈微碱性；微溶于氨，不溶于乙醇。在干燥空气中风化，加热至100°C时失去结晶水变为无水物。

化学性质

钨酸钠遇强酸生成钨酸沉淀：

Na2WO4 + 2 HCl —煮沸→ H2WO4↓(黄色) + 2 NaCl
Na2WO4 + 2 HCl + H2O → H2WO4·H2O↓(白色) + 2 NaCl

将硫化氢通入钨酸钠溶液，硫原子逐个取代钨酸根的氧原子，最后生成四硫代钨酸钠。

用途

用作制造金属钨、钨酸及钨酸盐的原料。可用作媒染剂、催化剂和颜料，以及织物防火剂和化学分析试剂等，也广泛应用于石油、航天及国防工业。

参考资料

  1. ^ 1.0 1.1 Merck: Sicherheitsdatenblatt[永久失效連結]
  2. ^ Lide, David R., Handbook of Chemistry and Physics 87, Boca Raton, FL: CRC Press: 486, 1998, ISBN 0849305942 

Read other articles:

Katedral Katolik Yunani Ruthenia Praha

Katedral Katolik Yunani Ruthenia PrahaGereja Katedral Katolik Yunani Ruthenia Santo Klemens di PrahaCeska: Katedrála sv. Klimentacode: cs is deprecated Katedral Katolik Yunani Ruthenia Praha50°05′10″N 14°24′54″E / 50.0861°N 14.4150°E / 50.0861; 14.4150Koordinat: 50°05′10″N 14°24′54″E / 50.0861°N 14.4150°E / 50.0861; 14.4150LokasiPrahaNegara Republik CekoDenominasiGereja Katolik Roma (sui iuris: Gereja Katolik Yunani...

 

Panasonic Gobel Awards 2012

Panasonic Gobel Awards 2012DisponsoriPanasonicTanggalSelasa, 27 Maret 2012LokasiXXI Djakarta Theater, Jl. M.H. Thamrin No. 9, Kebon Sirih, Menteng, Jakarta PusatPembawa acara Choky Sitohang Fenita Arie IkhtisarPenghargaan terbanyakRCTI (16)Drama SeriPutri yang DitukarAktorRezky AdityaAktrisAsmirandahSiaran televisi/radioSaluran RCTI MNCTV Global TV Waktu tayang4 jam 30 menit← 2011 Panasonic Gobel Awards2013 → Panasonic Gobel Awards 2012 adalah acara penganugerahan Panasonic Gobel ...

 

Karol Beck

Slovak professional tennis player Karol BeckCountry (sports) SlovakiaResidenceZvolen, SlovakiaBorn (1982-04-03) 3 April 1982 (age 41)Zvolen, CzechoslovakiaHeight1.80 m (5 ft 11 in)Turned pro2001Retired2018 (last match in 2020)PlaysRight-handed (two-handed backhand)Prize money$2,110,846SinglesCareer record65–116Career titles0Highest rankingNo. 36 (22 August 2005)Grand Slam singles resultsAustralian Open3R (2005)French Open1R (2003, ...

Shackle

Metal assembly which functions as a removable connecting link For other uses, see Shackle (disambiguation). This article includes a list of general references, but it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. (April 2010) (Learn how and when to remove this template message) Different types of shackles. The yellow cable ties indicate the date of the last tool inspection. A well used shackle. A shackle (or shackle...

 

Saturn Award du meilleur acteur de télévision dans un second rôle

Les gagnants du Saturn Award du meilleur acteur de télévision dans un second rôle pour le réalisateur et l'acteur de la série Breaking Bad Vince Gilligan et Aaron Paul. Le Saturn Award du meilleur acteur de télévision dans un second rôle (Saturn Award for Best Genre TV Supporting Actor puis Saturn Award for Best Supporting Actor on Television) est une récompense télévisuelle décernée chaque année depuis 2000 par l'Académie des films de science-fiction, fantastique et horreur (A...

 

River Swift

River in Leicestershire and Warwickshire, England For other rivers with this name, see Swift River. River SwiftRiver Swift near LutterworthLocation of the mouth within WarwickshireLocationCountryEnglandCountiesLeicestershire, WarwickshireTownsLutterworth, RugbyPhysical characteristicsSource  • locationUpper Bruntingthorpe, Leicestershire MouthConfluence with River Avon • locationRugby, Warwickshire • coordinates52°23′13″N 1°15′...

Человек прямоходящий

† Человек прямоходящий Научная классификация Домен:ЭукариотыЦарство:ЖивотныеПодцарство:ЭуметазоиБез ранга:Двусторонне-симметричныеБез ранга:ВторичноротыеТип:ХордовыеПодтип:ПозвоночныеИнфратип:ЧелюстноротыеНадкласс:ЧетвероногиеКлада:АмниотыКлада:Синапсиды�...

 

Eastern Air Lines Flight 212

1974 aviation accident Eastern Air Lines Flight 212Wreckage of N8984E at the crash siteAccidentDateSeptember 11, 1974 7:34 am EDTSummaryControlled flight into terrainSiteNear Douglas Municipal Airport, Charlotte, North Carolina, U.S. 35°09′14″N 80°55′34″W / 35.15389°N 80.92611°W / 35.15389; -80.92611AircraftAircraft typeDouglas DC-9-31OperatorEastern Air LinesIATA flight No.EA212ICAO flight No.EAL212Call signEASTERN 212RegistrationN8984E[1]Flig...

 

ستانلي كوبريك

ستانلي كوبريك (بالإنجليزية: Stanley Kubrick)‏    معلومات شخصية اسم الولادة (بالإنجليزية: Stanley Kubrick)‏  الميلاد 26 يوليو 1928(1928-07-26)نيويورك، الولايات المتحدة الوفاة 7 مارس 1999 (70 سنة)هارتفوردشير، إنجلترا سبب الوفاة نوبة قلبية  مكان الدفن شيلدويكبيري مانور مواطنة الولايات المت�...

List of Olympic medalists in canoeing (men)

See also: List of Olympic medalists in canoeing (women) and Canoeing at the Summer Olympics This is the complete list of men's Olympic medalists in canoeing. Current program Slalom C-1 Games Gold Silver Bronze 1972 Munichdetails Reinhard Eiben East Germany Reinhold Kauder West Germany Jamie McEwan United States 1976–1988 not included in the Olympic program 1992 Barcelonadetails Lukáš Pollert Czechoslovakia Gareth Marriott Great Britain Jacky Avril France 199...

 

Celtic studies

Study of cultural output relating to the Celtic-speaking peoples This article may require cleanup to meet Wikipedia's quality standards. The specific problem is: References. Please help improve this article if you can. (December 2022) (Learn how and when to remove this message) The Celtic nations, where most Celtic speakers are now concentrated Celtic studies or Celtology is the academic discipline occupied with the study of any sort of cultural output relating to the Celtic-speaking peoples ...

 

Jiangmen railway station

Railway station in Jiangmen, Guangdong Jiangmen江门Station buildingGeneral informationLocationXinhui District, Jiangmen, GuangdongChinaLine(s)Guangzhou–Zhuhai railway (freight only)Guangzhou–Zhuhai intercity railwayShenzhen–Zhanjiang high-speed railwayZhuhai-Zhaoqing High-Speed RailwayOther informationStation codeTMIS code: 23498Telegraph code: JOQPinyin code: JMEHistoryOpened29 December 2012 (freight)15 November 2020 (passenger)Services Preceding station China Railway High-speed Foll...

俄亥俄州

  「俄亥俄」重定向至此。关于其他用法，请见「俄亥俄 (消歧义)」。 俄亥俄州 美國联邦州State of Ohio 州旗州徽綽號：七葉果之州地图中高亮部分为俄亥俄州坐标：38°27'N－41°58'N, 80°32'W－84°49'W国家 美國加入聯邦1803年3月1日，在1953年8月7日追溯頒定（第17个加入联邦）首府哥倫布（及最大城市）政府 • 州长（英语：List of Governors of {{{Name}}}]]） •&...

 

周處除三害 (電影)

周處除三害The Pig, The Snake and The Pigeon正式版海報基本资料导演黃精甫监制李烈黃江豐動作指導洪昰顥编剧黃精甫主演阮經天袁富華陳以文王淨李李仁謝瓊煖配乐盧律銘林孝親林思妤保卜摄影王金城剪辑黃精甫林雍益制片商一種態度電影股份有限公司片长134分鐘产地 臺灣语言國語粵語台語上映及发行上映日期 2023年10月6日 (2023-10-06)（台灣） 2023年11月2日 (2023-11-02)（香�...

 

Повітряні сили Збройних сил України

Ця стаття потребує додаткових посилань на джерела для поліпшення її перевірності. Будь ласка, допоможіть удосконалити цю статтю, додавши посилання на надійні (авторитетні) джерела. Зверніться на сторінку обговорення за поясненнями та допоможіть виправити недоліки. Мат...

De Havilland Mosquito

De Havilland Mosquito de Havilland Mosquito DH.98 adalah pesawat tempur multi-peran Inggris dengan dua orang kru yang bertugas selama Perang Dunia II dan era pasca perang. Mosquito adalah salah satu dari beberapa pesawat operasional garis depan dari era Perang Dunia II yang akan dibangun hampir seluruhnya dari kayu dan, dengan demikian, dijuluki The Wooden Ajaib. Mosquito juga dikenal sayang sebagai Mossie untuk kru nya. Pada saat Perang Dunia II, perewat bomber punya perlengkapan pertahanan...

 

Nanatsoho

Native American tribe The Nanatsoho were a Native American tribe that lived at the border of Arkansas, Oklahoma, and Texas.[1] History The Nanatsoho were part of the Kadohadacho branch of the Caddo Confederacy. During the late 17th and early 18th centuries, they settled along the Great Bend of the Red River, in present day Bowie and Red River Counties.[2] Henri Joutel, a French adventurer, was the first known European to contact the Nanatsoho in 1687.[3] In 1719 French...

 

Jacques André

French fighter pilot Jacques Louis AndréJacques André in May 1946.Born(1919-02-25)25 February 1919Paris, FranceDied2 April 1988(1988-04-02) (aged 69)Antibes, FranceAllegiance FranceService/branchFrench Air ForceYears of service1939 – 1968RankColonelUnitNormandie-Niemen RegimentAwardsHero of the Soviet UnionLegion of Honour Jacques André (25 February 1919 – 2 April 1988) was a French fighter pilot in the Normandie-Niemen Regiment, which flew on the Eastern Front o...

C.R.A.Z.Y.

2005 film CRAZY redirects here. For other uses, see Crazy (disambiguation). C.R.A.Z.Y.Theatrical release posterDirected byJean-Marc ValléeWritten by François Boulay Jean-Marc Vallée Produced by Pierre Even Jean-Marc Vallée Starring Marc-André Grondin Pierre-Luc Brillant Michel Côté Danielle Proulx CinematographyPierre MignotEdited byPaul JutrasProductioncompaniesCirrus CommunicationsPlaytime FilmsDistributed byTVA FilmsRelease date May 27, 2005 (2005-05-27) Running time1...

 

The Bride Dept

Artikel ini sebatang kara, artinya tidak ada artikel lain yang memiliki pranala balik ke halaman ini.Bantulah menambah pranala ke artikel ini dari artikel yang berhubungan atau coba peralatan pencari pranala.Tag ini diberikan pada Februari 2023. The Bride DeptTipePerseroan terbatasBahasaIndonesia, InggrisBerdiri sejakDesember 2015StatusAktif The Bride Dept adalah sebuah portal yang berisikan informasi dan inspirasi bagi calon pengantin untuk membantu mereka mempersiapkan hari paling bahagia d...