| 词条 | Sodium stannate |
| 释义 |
| ImageFile = Na2Sn(OH)6.png | ImageSize = | ImageAlt = White powder of sodium stannate | ImageCaption = | ImageFile1 = | ImageName1 = Molecular Structure of Sodium Stannate | IUPACName = Sodium hexahydroxostannate(IV) | OtherNames = disodium hexahydroxyltin Sodium stannate(IV) sodium stannate–3–water sodium tin(IV) oxide hydrate |Section1={{Chembox Identifiers | CASNo = 12027-70-2 | CASNo_Ref = | PubChem = | RTECS = | EINECS = | ChemSpiderID = | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | SMILES = | InChI = | InChIKey = | StdInChI = | StdInChI_Ref = | StdInChIKey = | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} |Section2={{Chembox Properties | Formula = H6Na2O6Sn | MolarMass = 266.73 g/mol | Appearance = Colorless or white solid | Density = 4.68 g/cm3 | MeltingPt = | BoilingPt = N/A | Solubility = }} |Section3={{Chembox Hazards | HPhrases = H300 + H310 + H330 + H410 | ExploLimits = | ExternalSDS = [1] | FlashPtC = 57 | AutoignitionPt = N/A | LD50 = 2132 mg/kg [Mouse] | MainHazards = | NFPA-H = 2 | NFPA-F = 0 | NFPA-R = 0 | NFPA-S = | PEL = | RPhrases = }} }}Sodium stannate, formally sodium hexahydroxostannate(IV), is the inorganic compound with the formula Na2[Sn(OH)6]. This colourless salt forms upon dissolving metallic tin or tin(IV) oxide in sodium hydroxide, and is used as a stabiliser for hydrogen peroxide.[2] In older literature, stannates are sometimes represented as having the simple oxyanion SnO32−,[3] in which case this compound is sometimes named as sodium stannate–3–water and represented as Na2SnO3·3H2O, a hydrate with three waters of crystallisation.[1] The anhydrous form of sodium stannate, Na2SnO3, is recognised as a distinct compound with its own CAS Registry Number,[4] {{nowrap|{{CAS|12058-66-1}},}} and a distinct materials safety data sheet.[5] Alkali metal stannate compounds are prepared by dissolving elemental tin in a suitable metal hydroxide, in the case of sodium stannate by the reaction:[6] Sn + 2 NaOH + 4 H2O → Na2[Sn(OH)6] + 2 H2 A similar reaction occurs when tin dioxide is dissolved in base: SnO2 + 2 NaOH + 2 H2O → Na2[Sn(OH)6] The anhydrous form can also be prepared from tin dioxide by roasting with sodium carbonate in a mixed carbon monoxide / carbon dioxide environment:[7] SnO2 + Na2CO3 → Na2SnO3 + CO2 The anion is a coordination complex that is octahedral in shape, similar to most stannates, such as the hexachlorostannate anion {{nowrap|[SnCl6]2−}}. The Sn—O bond distances average 2.071 Å.[8] References1. ^1 {{cite web|title=Material Safety Data Sheet – sodium stannate trihydrate MSDS|url=http://www.sciencelab.com/msds.php?msdsId=9925038|publisher=Science Lab|date = 21 May 2013|accessdate=1 June 2017}} 2. ^{{cite book|last = Clark|first = John D.|authorlink = John Drury Clark|year = 1972|title = Ignition! An Informal History of Liquid Rocket Propellants|publisher = Rutgers University Press|isbn = 0813507251}} 3. ^Similarly, stannites are sometimes represented with the anion SnO22− 4. ^{{cite web|url = https://pubchem.ncbi.nlm.nih.gov/compound/Sodium_stannate#section=Molecular-Formula|title = Sodium Stannate|publisher = PubChem|accessdate = 1 June 2017|author = National Center for Biotechnology Information|year = 2017}} 5. ^{{cite web|url = http://datasheets.scbt.com/sc-229318.pdf|title = Sodium Stannate MSDS|accessdate = 1 June 2017|date = 14 June 2011|publisher = Santa Cruz Biotechnology}} 6. ^{{cite book|first1 = Norman N.|last1 = Greenwood|authorlink1 = Norman Greenwood|last2 = Earnshaw|first2 = Alan|year = 1997|title = Chemistry of the Elements|edition = 2nd|publisher = Butterworth-Heinemann|isbn = 0750633654}} 7. ^{{cite journal|journal = Hydrometallurgy|volume = 146|year = 2014|pages = 82–88|title = Sodium stannate preparation from stannic oxide by a novel soda roasting–leaching process|first1 = Yuanbo|last1 = Zhang|first2 = Zijian|last2 = Su|first3 = Bingbing|last3 = Liu|first4 = Zhixiong|last4 = You|first5 = Guang|last5 = Yang|first6 = Guanghui|last6 = Li|first7 = Tao|last7 = Jiang|doi = 10.1016/j.hydromet.2014.03.008}} 8. ^{{cite journal|first1 = Herbert|last1 = Jacobs|first2 = Rainer|last2 = Stahl|title = Neubestimmung der Kristallstrukturen der Hexahydroxometallate Na2Sn(OH)6, K2Sn(OH)6 und {{nowrap|K2Pb(OH)6}}|language = German|journal = Z. Anorg. Allg. Chem.|year = 2000|volume = 626|issue = 9|pages = 1863–1866|doi = 10.1002/1521-3749(200009)626:9<1863::AID-ZAAC1863>3.0.CO;2-M}} 3 : Stannates|Sodium compounds|Hydroxides |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。