Chemistry:Silver sulfate

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Silver sulfate
Skeletal formula of silver sulfate
Silver(I)-sulfate-xtal-2x2x2-3D-sf-v2.png
Sample of silver sulfate
Names
IUPAC name
Silver(I) sulfate
Other names
Disilver sulfate
Argentous sulfate
Identifiers
3D model (JSmol)
ChemSpider
EC Number
  • 233-653-7
UNII
UN number 3077
Properties
Ag2SO4
Molar mass 311.79 g·mol−1
Appearance Colorless solid
Odor Odorless
Density 5.45 g/cm3 (25 °C)
4.84 g/cm3 (660 °C)[1]
Melting point 652.2–660 °C (1,206.0–1,220.0 °F; 925.4–933.1 K)[1][5]
Boiling point 1,085 °C (1,985 °F; 1,358 K)[3][5] decomposition
0.57 g/100 mL (0 °C)
0.69 g/100 mL (10 °C)
0.83 g/100 mL (25 °C)
0.96 g/100 mL (40 °C)
1.33 g/100 mL (100 °C)[2]
1.2·10−5[1]
Solubility Dissolves in aq. acids, alcohols, acetone, ether, acetates, amides[2]
Insoluble in ethanol[3]
Solubility in sulfuric acid 8.4498 g/L (0.1 molH2SO4/LH2O)[2]
25.44 g/100 g (13 °C)
31.56 g/100 g (24.5 °C)
127.01 g/100 g (96 °C)[3]
Solubility in ethanol 7.109 g/L (0.5 nEtOH/H2O)[2]
Solubility in acetic acid 7.857 g/L (0.5 nAcOH/H2O)[2]
−9.29·10−5 cm3/mol[1]
nα = 1.756
nβ = 1.775
nγ = 1.782[4]
Structure
Orthorhombic, oF56[4]
Fddd, No. 70[4]
2/m 2/m 2/m[4]
a = 10.2699(5) Å, b = 12.7069(7) Å, c = 5.8181(3) Å[4]
α = 90°, β = 90°, γ = 90°
Thermochemistry
131.4 J/mol·K[1]
200.4 J/mol·K [1]
−715.9 kJ/mol[1]
−618.4 kJ/mol [1]
Hazards
GHS pictograms GHS05: CorrosiveGHS09: Environmental hazard[6]
GHS Signal word Danger
H318, H410[6]
P273, P280, P305+351+338, P501[6]
NFPA 704 (fire diamond)
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
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Silver sulfate is the inorganic compound with the formula Ag2SO4. It is a white solid with low solubility in water.

Preparation and structure

Silver sulfate precipitates as a solid when an aqueous solution of silver nitrate is treated with sulfuric acid:

2 AgNO3 + H2SO4 → Ag2SO4 + 2 HNO3

It is purified by recrystallization from concentrated sulfuric acid, a step that expels traces of nitrate.[7] Silver sulfate and anhydrous sodium sulfate adopt the same structure.[8]

Silver(II) sulfate

The synthesis of silver(II) sulfate (AgSO4) with a divalent silver ion instead of a monovalent silver ion was first reported in 2010[9] by adding sulfuric acid to silver(II) fluoride (HF escapes). It is a black solid that decomposes exothermally at 120 °C with evolution of oxygen and the formation of the pyrosulfate.

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 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. 2.0 2.1 2.2 2.3 2.4 Seidell, Atherton; Linke, William F. (1919). Solubilities of Inorganic and Organic Compounds (2nd ed.). New York: D. Van Nostrand Company. pp. 622–623. https://archive.org/details/solubilitiesino01seidgoog. 
  3. 3.0 3.1 3.2 Anatolievich, Kiper Ruslan. "silver sulfate". http://chemister.ru/Database/properties-en.php?dbid=1&id=1253. 
  4. 4.0 4.1 4.2 4.3 4.4 Morris, Marlene C.; McMurdie, Howard F.; Evans, Eloise H.; Paretzkin, Boris; Groot, Johan H. de; Hubbard, Camden R.; Carmel, Simon J. (June 1976). Standard X-ray Diffraction Powder Patterns. 25. Washington: Institute for Materials Research National Bureau of Standards. 
  5. 5.0 5.1 5.2 "MSDS of Silver sulfate". Fisher Scientific, Inc. https://www.fishersci.ca/viewmsds.do?catNo=S19025. 
  6. 6.0 6.1 6.2 Sigma-Aldrich Co., Silver sulfate. Retrieved on 2014-07-19.
  7. O. Glemser; R. Sauer (1963). "Copper (I) Sulfate". in G. Brauer. Handbook of Preparative Inorganic Chemistry, 2nd Ed.. 2pages=1042. NY, NY: Academic Press. 
  8. Zachariasen, W. H. (1932). "Note on the Crystal Structure of Silver Sulphate, Ag2SO4". Zeitschrift für Kristallographie - Crystalline Materials 82 (1–6): 161–162. doi:10.1524/zkri.1932.82.1.161. 
  9. Malinowski, P.; Derzsi, M.; Mazej, Z.; Jagličić, Z.; Gaweł, B.; Lasocha, W.; Grochala, W. (2010). "Ag(II)SO(4): A Genuine Sulfate of Divalent Silver with Anomalously Strong One-Dimensional Antiferromagnetic Interactions.". Angewandte Chemie International Edition in English 49 (9): 1683–1686. doi:10.1002/anie.200906863. PMID 20084660.