Silver oxide
| Names | |
|---|---|
| IUPAC name
Silver(I) oxide | |
| Other names
Silver rust, Argentous oxide, Silver monoxide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.039.946 |
| EC Number |
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| MeSH | silver+oxide |
PubChem CID |
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| RTECS number |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| Ag2O | |
| Molar mass | 231.735 g·mol−1 |
| Appearance | Black/ brown cubic crystals |
| Odor | Odorless |
| Density | 7.14 g/cm3 |
| Melting point | 300 °C (572 °F; 573 K) decomposes from ≥200 °C |
| 0.013 g/L (20 °C) 0.025 g/L (25 °C) 0.053 g/L (80 °C) | |
Solubility product (Ksp) of AgOH |
1.52·10−8 (20 °C) |
| Solubility | Soluble in acid, alkali Insoluble in ethanol |
| Acidity (pKa) | 12.1 (estimated) |
| −134.0·10−6 cm3/mol | |
| Structure | |
| Cubic | |
| Pn3m, 224 | |
| Thermochemistry | |
Heat capacity (C) |
65.9 J/mol·K |
Std molar entropy (S⦵298) |
122 J/mol·K |
Std enthalpy of formation (ΔfH⦵298) |
−31 kJ/mol |
Gibbs free energy (ΔfG⦵) |
−11.3 kJ/mol |
| Hazards | |
| GHS labelling: | |
| Danger | |
| H272, H315, H319, H335 | |
| P220, P261, P305+P351+P338 | |
| NFPA 704 (fire diamond) | |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
2.82 g/kg (rats, oral) |
| Related compounds | |
Related compounds |
Silver(I,III) oxide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Silver oxide is the chemical compound with the formula Ag2O. It is a fine black or dark brown powder that is used to prepare other silver compounds.