nyiaj oxide hmoov

Khoom npe: silver oxide

CAS: 20667-12-3

Cov mis mos molecular: Ag2O

Molecular Luj: 231.73

Suav lub npe: Silver oxide

Lub npe Askiv: Silver oxide; Argentous oxide; nyiaj oxide; disilver oxide; nyiaj oxide

Tus Qauv Zoo: Tus Qauv Ua Haujlwm HGB 3943-76

Lub cev muaj zog

Phe chemical formula ntawm silver oxide yog Ag2O, nrog rau qhov hnyav molecular ntawm 231.74. Xim av los yog greyish dub khoom, nrog ib tug ceev ntawm 7.143g / cm2, sai decomposes rau nyiaj thiab oxygen ntawm 300 ℃. Me ntsis soluble nyob rau hauv dej, heev soluble nyob rau hauv nitric acid, ammonia, sodium thiosulfate, thiab poov tshuaj cyanide daws. Thaum siv cov tshuaj ammonia, nws yuav tsum tau kho raws sijhawm. Kev raug mob ntev tuaj yeem ua rau cov pob zeb dub tawg heev - nyiaj nitride lossis nyiaj sulfite. Siv ua oxidant thiab iav colorant. Npaj los ntawm reacting silver nitrate tov nrog sodium hydroxide tov.

Xim av cubic crystalline los yog xim av dub hmoov. Bond ntev (Ag O) 205pm. Decomposition ntawm 250 degrees, tso pa oxygen. Qhov ceev 7.220g / cm3 (25 degrees). Lub teeb maj mam decomposes. React nrog sulfuric acid los tsim nyiaj sulfate. Me ntsis soluble hauv dej. Soluble hauv dej ammonia, sodium hydroxide tov, dilute nitric acid, thiab sodium thiosulfate tov. Insoluble hauv ethanol. Npaj los ntawm reacting silver nitrate tov nrog sodium hydroxide tov. Wet Ag2O yog siv los ua cov catalyst thaum hloov halogens nrog hydroxyl pawg hauv cov organic synthesis. Kuj tseem siv los ua cov khoom khaws cia thiab cov khoom siv hluav taws xob.

 

Cov cuab yeej tshuaj

Ntxiv cov tshuaj caustic rau cov nyiaj nitrate kom tau txais nws. Ua ntej, ib qho kev daws ntawm silver hydroxide thiab nitrate yog tau, thiab nyiaj hydroxide decomposes rau hauv cov nyiaj oxide thiab dej ntawm chav tsev kub. Silver oxide pib decompose thaum rhuab mus rau 250 ℃, tso oxygen, thiab sai decomposes saum 300 ℃. Me ntsis soluble nyob rau hauv dej, tab sis heev soluble nyob rau hauv cov kev daws teeb meem xws li nitric acid, ammonia, potassium cyanide, thiab sodium thiosulfate. Tom qab lub sij hawm ntev raug rau nws cov tshuaj ammonia, muaj zog tawg dub crystals tej zaum yuav precipitate - tej zaum silver nitride los yog silver iminide. Hauv cov organic synthesis, pawg hydroxyl feem ntau yog siv los hloov halogens lossis ua oxidants. Nws kuj tuaj yeem siv los ua cov xim pleev xim rau hauv kev lag luam iav.

 

Txoj kev npaj

Silver oxide tuaj yeem tau txais los ntawm kev ua haujlwm alkali hlau hydroxide nrog nyiaj nitrate. [1] Cov tshuaj tiv thaiv thawj zaug tsim cov nyiaj hydroxide tsis ruaj khov, uas tam sim ntawd decomposes kom tau txais dej thiab nyiaj oxide. Tom qab ntxuav lub precipitate, nws yuav tsum tau qhuav ntawm tsawg tshaj li 85 ° C, tab sis nws yog ib qho nyuaj heev kom tshem tawm ib tug me me ntawm cov dej ntawm cov nyiaj oxide nyob rau hauv lub kawg vim hais tias thaum kub nce, cov nyiaj oxide yuav decompose. 2 Ag+ + 2 OH- → 2 AgOH → Ag2O + H2O.

 

Kev siv yooj yim

Feem ntau yog siv los ua catalyst rau tshuaj synthesis. Nws kuj yog siv los ua cov khoom siv hluav taws xob, khoom siv hluav taws xob, iav xim, thiab kev sib tsoo. Siv rau kev kho mob thiab ua iav polishing tus neeg saib xyuas, xim, thiab dej purifier; Siv los ua polishing thiab xim tus neeg sawv cev rau iav.

 

Daim ntawv thov Scope

Silver oxide yog cov khoom siv electrode rau cov roj teeb nyiaj oxide. Nws kuj yog ib qho tsis muaj zog oxidant thiab tsis muaj zog hauv cov organic synthesis, uas tuaj yeem hnov ​​​​mob nrog 1,3-disubstituted imidazole ntsev thiab benzimidazole ntsev los tsim azenes. Nws tuaj yeem hloov cov ligands tsis ruaj khov xws li cyclooctadiene lossis acetonitrile li carbene hloov reagents los ua ke hloov pauv hlau carbene complexes. Tsis tas li ntawd, nyiaj oxide tuaj yeem hloov cov organic bromides thiab chlorides rau hauv cawv ntawm qhov kub thiab txias thiab muaj dej vapor. Nws yog siv los ua ke nrog iodomethane ua cov tshuaj methylation rau kev tsom xam cov piam thaj methylation thiab Hoffman tshem tawm cov tshuaj tiv thaiv, nrog rau kev oxidation ntawm aldehydes rau carboxylic acids.

 

Cov ntaub ntawv kev ruaj ntseg

Ntim qib: II

Kev Nyab Xeeb qeb: 5.1

Dangerous goods transport code: UN 1479 5.1/PG 2

WGK Germany: 2

Hazard qeb code: R34; R8

Cov lus qhia kev nyab xeeb: S17-S26-S36-S45-S36/37/39

RTECS No.: VW 4900000

Cov khoom phom sij daim ntawv lo: O: Oxidizing tus neeg sawv cev; C: Corrosive;