Silver sulfate

Silver sulfate
IUPAC name

Silver sulfate
Other names

Sulfuric acid, disilver(1+) salt
Identifiers
CAS number 10294-26-5 Y
PubChem 159865
ChemSpider 140554 Y
UNII 8QG6HV4ZPO Y
Jmol-3D images Image 1
Properties
Molecular formula Ag2SO4
Molar mass 311.799 g/mol
Appearance colourless crystals
Density 5.45 g/cm3 [1]
Melting point

652 °C, 925 K, 1206 °F
Boiling point

1085 °C, 1358 K, 1985 °F
Solubility in water 0.31 g/100 mL [2]
Solubility dissolves in nitric acid
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Silver sulfate (Ag2SO4) is an ionic compound of silver used in silver plating and as a non-staining substitute to silver nitrate. This sulfate is stable under ordinary conditions of use and storage, though it darkens upon exposure to air or light. It is minimally soluble in water.

Contents

Preparation

Silver sulfate is prepared by adding sulfuric acid to a solution of silver nitrate:

2 Ag+(aq) + SO42-(aq) → Ag2SO4 (s)

The precipitate is then washed with hot water and preparation is under ruby red illumination.

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 [3] 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. ^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0070494398
  2. ^ http://answers.yahoo.com/question/index?qid=20071204232429AAU6Wu9
  3. ^ 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 ed. in English) 49 (9): 1683–1686. doi:10.1002/anie.200906863. PMID 20084660.  edit

External links