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 | |
| Names | |
|---|---|
| IUPAC name Silver(I) sulfate | |
| Other names Disilver sulfate Argentous sulfate | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider |
|
| ECHA InfoCard | 100.030.581 |
| EC Number |
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| 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] | |
Solubility product (Ksp) | 1.2·10−5[1] |
| Solubility | Dissolves in aq.acids,alcohols,acetone,ether,acetates,amides[2] Insoluble inethanol[3] |
| Solubility insulfuric 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 inethanol | 7.109 g/L (0.5 nEtOH/H2O)[2] |
| Solubility inacetic acid | 7.857 g/L (0.5 nAcOH/H2O)[2] |
| −9.29·10−5 cm3/mol[1] | |
Refractive index (nD) | 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] | |
Std molar entropy(S⦵298) | 200.4 J/mol·K[1] |
Std enthalpy of formation(ΔfH⦵298) | −715.9 kJ/mol[1] |
Gibbs free energy(ΔfG⦵) | −618.4 kJ/mol[1] |
| Hazards | |
| GHS labelling: | |
  [6] | |
| Danger | |
| H318,H410[6] | |
| P273,P280,P305+P351+P338,P501[6] | |
| NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Silver sulfate is theinorganic compound with the formulaAg2SO4. It is a white solid with low solubility in water.
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Silver sulfate precipitates when an aqueous solution ofsilver nitrate is treated withsulfuric acid:
It is purified by recrystallization from concentrated sulfuric acid, a step that expels traces of nitrate.[7]Silver sulfate and anhydroussodium sulfate adopt the same structure.[8]
The synthesis ofsilver(II) sulfate (AgSO4) with a divalent silver ion instead of a monovalent silver ion was first reported in 2010[9] by addingsulfuric acid tosilver(II) fluoride (HF escapes). It is a black solid that decomposes exothermically at 120 °C with evolution of oxygen and the formation of the silver(I)pyrosulfate.
