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Hydrogen selenide

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Identification
Molecular formula
H2Se
CAS number
7783-07-5
IUPAC name
hydrogen selenide
State
State

Hydrogen selenide is a colorless gas at room temperature with a characteristic odor similar to decayed horseradish.

Melting point (Celsius)
-64.00
Melting point (Kelvin)
209.15
Boiling point (Celsius)
-41.25
Boiling point (Kelvin)
231.90
General information
Molecular weight
80.98g/mol
Molar mass
80.9790g/mol
Density
3.5530g/cm3
Appearence

Hydrogen selenide is a colorless gas under standard conditions. However, when it is condensed to a liquid or solid state, it appears as colorless liquid or ice-like solid.

Comment on solubility

Solubility of Hydrogen Selenide (H2Se)

Hydrogen selenide (H2Se) is a fascinating compound with notable solubility characteristics:

  • Highly Soluble in Water: H2Se is extremely soluble in water, with solubility levels reaching approximately 0.37 g per 100 mL at 20°C. This makes it comparable to other hydride compounds.
  • Formation of Aqueous Solutions: When dissolved, it can form a weak acid (hydroselenic acid), exhibiting acidic properties that can affect the pH of the solution.
  • Temperature Dependency: Like many gases, the solubility of H2Se in water decreases as the temperature increases, leading to greater effervescence at elevated temperatures.
  • Intermolecular Interactions: The solubility is largely attributed to the ability of H2Se to engage in dipole-dipole interactions and hydrogen bonding with water molecules.

In summary, the solubility of hydrogen selenide is significant and can influence various chemical reactions, making it an important compound in both environmental and industrial contexts. As one fascinating observer noted, "the behavior of H2Se in solution reveals intricate relationships between solubility, reactivity, and the nature of solvents." Understanding these properties can open avenues for further exploration and application.

Interesting facts

Interesting Facts about Hydrogen Selenide

Hydrogen selenide (H2Se) is a fascinating chemical compound with unique properties and applications. Here are some compelling facts:

  • Toxic Nature: Hydrogen selenide is highly toxic and poses significant health risks. It is classified as a toxic gas and can be lethal even in small concentrations.
  • Foul Odor: Often described as smelling like rotten eggs, the compound's distinct scent can be a warning sign of its presence, although it can be masked by its toxicity at higher levels.
  • Occurrence: Naturally, H2Se can be found in volcanic gases and is a byproduct of certain industrial processes, particularly in the metallurgy of selenium.
  • Uses in Chemistry: In laboratory settings, hydrogen selenide is utilized in the synthesis of various selenides, and it serves as a source of selenium in organic chemistry.
  • Environmental Concerns: Due to its toxicity and potential environmental impacts, there is a strong focus on monitoring and controlling hydrogen selenide emissions during industrial production.

As a chemist, studying hydrogen selenide offers valuable insights into the behavior of non-metal hydrides and their interactions with other elements. Its dual nature as both an essential compound in some contexts and a hazardous substance provides a unique perspective on the balance of utility and safety in chemistry.

Synonyms
Hydrogen selenide
Dihydrogen selenide
7783-07-5
V91P54KPAM
H2Se
dihydridoselenium
[SeH2]
DTXSID20872822
C01528
Q409314