Silver sulfite

Silver sulfite

Names
IUPAC name Silver(I) sulfite, Silver sulfite
Identifiers
CAS Number	13465-98-0
ChemSpider	2341258
EC Number	236-714-6
Jmol interactive 3D	Image
PubChem	3084149
InChI InChI=1S/2Ag.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2 Key: WYCFMBAHFPUBDS-UHFFFAOYSA-L
SMILES [O-]S(=O)[O-].[Ag+].[Ag+]
Properties
Chemical formula	Ag2O3S
Molar mass	295.79 g·mol^−1
Appearance	White crystals
Odor	Odorless
Melting point	100 °C (212 °F; 373 K) decomposes[1][2]
Solubility in water	4.6 mg/L (20 °C)[1]
Solubility product (Ksp)	1.5·10^−14[1]
Solubility	Soluble in aq. NH4OH, alkali sulfites, AcOH Decomposes in strong acids[3] Insoluble in liquid SO2[4]
Structure
Crystal structure	Monoclinic, mP24[5]
Space group	P21/c, No. 14[5]
Point group	2/m[5]
Lattice constant	a = 4.6507 Å, b = 7.891 Å, c = 11.173 Å[5] α = 90°, β = 120.7°, γ = 90°
Hazards
GHS pictograms	[2]
GHS signal word	Warning
GHS hazard statements	H315, H319, H335[2]
GHS precautionary statements	P261, P305+351+338[2]
EU classification (DSD)	Xi
R-phrases	R36/37/38
S-phrases	S26, S36
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

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.^[4]

Preparation

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.^[4]

References

1. 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. Sigma-Aldrich Co., Silver carbonate. Retrieved on 2014-07-31.
3. Comey, Arthur Messinger; Hahn, Dorothy A. (1921-02). A Dictionary of Chemical Solubilities: Inorganic (2nd ed.). New York: The MacMillan Company. p. 1046. Check date values in: |date= (help)
4. Brauer, Georg, ed. (1965). Handbook of Preparative Inorganic Chemistry 2. New York: Academic Press Inc. p. 1043. ISBN 0323161294.
5. 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.