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What are the properties of H2S?
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Hydrogen sulfide (H₂S) is a chemical compound with several notable properties:
Physical Properties:
- Appearance: Colorless gas.
- Odor: Characteristic foul odor of rotten eggs at low concentrations.
- Molar Mass: 34.08 g/mol.
- Melting Point: -82 °C (-116 °F).
- Boiling Point: -60 °C (-76 °F).
- Density: 1.363 g/L (at 0 °C). Heavier than air.
- Solubility: Slightly soluble in water. Soluble in organic solvents.
Chemical Properties:
- Flammability: Highly flammable; burns with a blue flame to produce sulfur dioxide (SO₂).
- Acidity: Weak acid in aqueous solutions.
- Reactivity:
- Reacts with metals to form metal sulfides.
- Acts as a reducing agent.
- Corrosive to many metals, including iron, steel, and copper, especially in the presence of moisture.
- Toxicity: Extremely toxic. It inhibits cellular respiration. CDC Source
Other Properties:
- Occurrence: Found in crude petroleum, natural gas, volcanic gases, and produced by bacterial breakdown of organic matter.
- Hazards:
- Toxic by inhalation.
- Irritating to eyes and respiratory system.
- Can cause rapid loss of consciousness and death at high concentrations. OSHA Source