Silver oxide

From Wikipedia, the free encyclopedia
(Redirected from Silver hydroxide)
Jump to navigation Jump to search

Script error: No such module "about". <templatestyles src="Chembox/styles.css"/>

Template:Chembox image cellTemplate:Chembox image cellTemplate:Chembox image cellTemplate:Chembox AllOtherNamesTemplate:Chembox headerbarTemplate:Chembox IndexlistTemplate:Chembox JmolTemplate:Chembox ChEMBLTemplate:Chembox ECHATemplate:Chembox E numberTemplate:Chembox IUPHAR ligandTemplate:Chembox UNIITemplate:Chembox CompToxTemplate:Chembox headerbarTemplate:Chembox SolubilityInWaterTemplate:Chembox headerbarTemplate:Chembox headerbarTemplate:Chembox DeltaGfreeTemplate:Chembox headerbarTemplate:Chembox GHS (set)Template:Chembox Lethal amounts (set)Template:Chembox headerbarTemplate:Chembox Datapage checkTemplate:Chembox Footer
Silver oxide
Template:Longitem Template:Unbulleted list
ChEBI Template:Unbulleted list
ChemSpider Template:Unbulleted list
DrugBank Template:Unbulleted list
EC Number Template:Unbulleted list
KEGG Template:Unbulleted list
MeSH silver+oxide
Template:Longitem Template:Unbulleted list
RTECS number Template:Unbulleted list
Script error: No such module "collapsible list".
Script error: No such module "collapsible list".
Template:Longitem Template:Chembox Elements/molecular formula
Molar mass Template:Chem molar mass
Appearance Black/ brown cubic crystals
Odor Odorless[1]
Density 7.14 g/cm3
Melting point Template:Chembox CalcTemperatures
Template:Longitem 1.52·10−8 (20 °C)
Solubility Soluble in acid, alkali
Insoluble in ethanol[2]
Acidity (pKa) 12.1 (estimated)[4]
Template:Longitem −134.0·10−6 cm3/mol
Template:Longitem Cubic
Template:Longitem Pn3m, 224
Template:Longitem 65.9 J/mol·K[2]
Template:Longitem 122 J/mol·K[6]
Template:Longitem −31 kJ/mol[6]
NFPA 704 (fire diamond) Template:NFPA 704 diamond
Template:Longitem Silver(I,III) oxide

Template:Chembox Footer/trackingScript error: No such module "TemplatePar".Template:Short description

Silver oxide is the chemical compound with the formula Ag2O. It is a fine black or dark brown powder that is used to prepare other silver compounds.

Preparation

File:Silver(I) oxide.JPG
Silver(I) oxide produced by reacting lithium hydroxide with a very dilute silver nitrate solution

Silver oxide can be prepared by combining aqueous solutions of silver nitrate and an alkali hydroxide.[8][9] This reaction does not afford appreciable amounts of silver hydroxide due to the favorable energetics for the following reaction:[10]

Template:Chem2Script error: No such module "String".(pK = 2.875[11])

With suitably controlled conditions, this reaction can be used to prepare Ag2O powder with properties suitable for several uses including as a fine grained conductive paste filler.[12]

Structure and properties

Ag2O features linear, two-coordinate Ag centers linked by tetrahedral oxides. It is isostructural with Cu2O. It "dissolves" in solvents that degrade it. It is slightly soluble in water due to the formation of the ion Template:Chem2 and possibly related hydrolysis products.[13] It is soluble in ammonia solution, producing active compound of Tollens' reagent. A slurry of Ag2O is readily attacked by acids:

Template:Chem2

where HX = HF, HCl, HBr, HI, or CF3COOH. It will also react with solutions of alkali chlorides to precipitate silver chloride, leaving a solution of the corresponding alkali hydroxide.[13][14]

Despite the photosensitivity of many silver compounds, silver oxide is not photosensitive,[15] although it readily decomposes at temperatures above 280 °C.[16]

Applications

This oxide is used in silver-oxide batteries.[17] In organic chemistry, silver oxide is used as a mild oxidizing agent.[18] For example, it oxidizes aldehydes to carboxylic acids.[19]

References

<templatestyles src="Reflist/styles.css" />

  1. ↑ a b Script error: No such module "citation/CS1".
  2. ↑ a b c Script error: No such module "citation/CS1".
  3. ↑ a b Script error: No such module "citation/CS1".
  4. ↑ Script error: No such module "citation/CS1".
  5. ↑ a b Script error: No such module "citation/CS1".
  6. ↑ a b Script error: No such module "citation/CS1".
  7. ↑ a b c Template:Sigma-Aldrich
  8. ↑ O. Glemser and H. Sauer "Silver Oxide" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 1037.
  9. ↑ Script error: No such module "Citation/CS1".; Script error: No such module "citation/CS1"..
  10. ↑ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. Template:ISBN.
  11. ↑ Script error: No such module "Citation/CS1".
  12. ↑ <templatestyles src="Citation/styles.css"/>Template:Citation/make link, Harigae, Kenichi & Shoji, Yoshiyuki, "Fine-grain silver oxide powder", published Script error: No such module "auto date formatter". Script error: No such module "Check for unknown parameters".
  13. ↑ a b Script error: No such module "citation/CS1".
  14. ↑ General Chemistry by Linus Pauling, 1970 Dover ed. p703-704
  15. ↑ Script error: No such module "Citation/CS1".
  16. ↑ Merck Index of Chemicals and Drugs Script error: No such module "webarchive"., 14th ed. monograph 8521
  17. ↑ Script error: No such module "citation/CS1".
  18. ↑ Script error: No such module "citation/CS1".
  19. ↑ Script error: No such module "Citation/CS1".

Script error: No such module "Check for unknown parameters".

External links

Script error: No such module "Side box".

Template:Oxides Script error: No such module "Navbox".

Retrieved from "http://debianws.lexgopc.com/wiki143/index.php?title=Silver_oxide&oldid=2020816#Preparation"