| 词条 | Sodium pyrosulfate |
| 释义 |
| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 407956312 | Reference =[1] | ImageFile =Sodium pyrosulfate.png | ImageSize = 150px | IUPACName = Disodium disulfate | OtherNames = Sodium pyrosulphate; Disulfuric acid disodium salt, disodium disulfate |Section1={{Chembox Identifiers | CASNo_Ref = {{cascite|correct|??}} | CASNo = 13870-29-6 | PubChem = | ChEMBL_Ref = {{ebicite|changed|EBI}} | ChEMBL = 111016 | SMILES = [Na+].[Na+].[O-]S(=O)(=O)OS(=O)(=O)[O-] }} |Section2={{Chembox Properties | Formula = Na2S2O7 | MolarMass = 222.12 g/mol | Appearance = Translucent white crystals | Density = 2.658 g/cm3 | MeltingPtC = 400.9 | BoilingPt= decomposes at | BoilingPtC = 460 | Solubility = hydrolyses[2] }} |Section3={{Chembox Hazards | MainHazards = | FlashPt = | AutoignitionPt = }}Sodium pyrosulfate is an inorganic compound with the chemical formula of Na2S2O7.[1] It is a colorless salt.[3] PreparationSodium pyrosulfate is obtained by the dehydration of sodium bisulfate:[4] 2 NaHSO4 → Na2S2O7 + H2O Temperatures above 460 °C further decompose the compound, producing sodium sulfate and sulfur trioxide: Na2S2O7 → Na2SO4 + SO3 ApplicationsSodium pyrosulfate was used in analytical chemistry. Samples are fused with sodium pyrosulfate to ensure complete dissolution before a quantitative analysis.[5][6] See also
References1. ^1 {{cite book |editor-last=Olsen |editor-first=J. C. |title=Van Nostrand's Chemical Annual |publisher=Chapman and Hall |location=London |year=1934 |isbn= |oclc= }} {{Sodium compounds}}{{Inorganic-compound-stub}}2. ^{{cite journal|author1=Heinz K. Hofmeister|author2=John R. Van Wazer|title=Hydrolysis of Sodium Pyrosulfate |journal=Inorganic Chemistry|volume=1|issue=4|pages=811–812|publisher=ACS|year=1962|doi=10.1021/ic50004a019}} 3. ^{{cite journal|author=Helmold Plessen|title=Sodium Sulfates|journal=Ullmann's Encyclopedia of Industrial Chemistry|publisher=Wiley-VCH|year=2000|location=Weinheim|doi=10.1002/14356007.a24_355|isbn=978-3527306732}} 4. ^{{cite book|last1=Noyes|first1=William|title=A Textbook of Chemistry|date=1913|publisher=Henry Holt and Company|location=New York|page=186|url=https://books.google.com/books?id=Qp0-AAAAYAAJ&pg=PA186#v=onepage&q&f=false|accessdate=13 January 2016}} 5. ^{{cite book|last1=Nemodruk|first1=Aleksandr|last2=Karalova|first2=Zinaida|title=Analytical chemistry of boron: Analytical chemistry of the elements|date=1969|publisher=Ann Arbor-Humphrey Science Publishers|location=Charlottesville, VA|isbn=9780250399192|pages=23 & 193|url=https://books.google.com/?id=UAYpAAAAYAAJ&q=%22Sodium+pyrosulfate%22+%22used+for%22&dq=%22Sodium+pyrosulfate%22+%22used+for%22}} 6. ^{{cite journal|last1=Kiely|first1=P. V.|last2=Jackson|first2=M. L.|title=Quartz, Feldspar, and Mica Determination for Soils by Sodium Pyrosulfate Fusion|journal=Soil Science Society of America Journal|date=1965|volume=29|issue=2|pages=159–163|doi=10.2136/sssaj1965.03615995002900020015x|bibcode=1965SSASJ..29..159K}} 2 : Sodium compounds|Pyrosulfates |
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