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Silver sulfite

Summary

Silver sulfite is the chemical compound with the formula Ag2SO3. This unstable silver compound when heated and/or in light it decomposes to silver dithionate and silver sulfate.[3]

Silver sulfite
Skeletal formula of silver sulfite
Crystal structure of silver sulfite
Names
IUPAC name
Silver(I) sulfite, Silver sulfite
Identifiers
  • 13465-98-0 checkY
3D model (JSmol)
  • Interactive image
ChemSpider
  • 2341258 checkY
ECHA InfoCard 100.033.362 Edit this at Wikidata
EC Number
  • 236-714-6
  • 3084149
  • DTXSID90889609 Edit this at Wikidata
  • InChI=1S/2Ag.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2 checkY
    Key: WYCFMBAHFPUBDS-UHFFFAOYSA-L checkY
  • [O-]S(=O)[O-].[Ag+].[Ag+]
Properties
Ag2O3S
Molar mass 295.79 g·mol−1
Appearance White crystals
Odor Odorless
Melting point 100 °C (212 °F; 373 K)
decomposes[1][4]
4.6 mg/L (20 °C)[1]
1.5·10−14[1]
Solubility Soluble in aq. NH4OH, alkali sulfites, AcOH
Decomposes in strong acids[2]
Insoluble in liquid SO2[3]
Structure
Monoclinic, mP24[5]
P21/c, No. 14[5]
2/m[5]
a = 4.6507 Å, b = 7.891 Å, c = 11.173 Å[5]
α = 90°, β = 120.7°, γ = 90°
Hazards
GHS labelling:
GHS07: Exclamation mark[4]
Warning
H315, H319, H335[4]
P261, P305+P351+P338[4]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Preparation edit

Silver sulfite can be prepared by dissolving silver nitrate with the stoichiometric quantity of sodium sulfite solution, yielding a precipitation of silver sulfite by the following reaction:

2 AgNO3 + Na2SO3 ⇌ Ag2SO3 + 2 NaNO3

After precipitation then filtering silver sulfite, washing it using well-boiled water, and drying it in vacuum.[3]

References edit

  1. ^ a b c Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0.
  2. ^ Comey, Arthur Messinger; Hahn, Dorothy A. (February 1921). A Dictionary of Chemical Solubilities: Inorganic (2nd ed.). New York City: The MacMillan Company. p. 1046.
  3. ^ a b c Brauer, Georg, ed. (1965). Handbook of Preparative Inorganic Chemistry. Vol. 2. New York: Academic Press Inc. p. 1043. ISBN 0323161294.
  4. ^ a b c d Sigma-Aldrich Co., Silver carbonate. Retrieved on 2014-07-31.
  5. ^ a b c d Larsson, Lars Olof (1969). "The Crystal Structure of Silver Sulphite". Acta Chemica Scandinavica. 23 (7): 2261–2269. doi:10.3891/acta.chem.scand.23-2261.