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
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.362 Edit this at Wikidata
EC Number
  • 236-714-6
  • 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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Preparation

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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

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  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.