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Sulfur trioxide

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Identification
Molecular formula
SO3
CAS number
7446-11-9
IUPAC name
sulfur trioxide
State
State

At room temperature, sulfur trioxide can exist as a liquid, but it also commonly appears as a fuming liquid due to its reaction with water vapor in the air, leading to the formation of sulfuric acid. When in crystalline form, it is a solid.

Melting point (Celsius)
16.90
Melting point (Kelvin)
290.00
Boiling point (Celsius)
44.80
Boiling point (Kelvin)
317.90
General information
Molecular weight
80.07g/mol
Molar mass
80.0660g/mol
Density
1.9200g/cm3
Appearence

Sulfur trioxide is a colorless liquid or a white crystalline solid. When present as a liquid or in a gaseous state, it is often invisible but upon cooling, it forms needle-like crystals. It fumes in air by reacting with moisture and can momentarily appear as white smoke due to the formation of sulfuric acid droplets.

Comment on solubility

Solubility of Sulfur Trioxide

Sulfur trioxide (SO3) is an interesting compound when it comes to solubility. It is a colorless, corrosive gas at room temperature and exhibits unique behavior when interacting with water.

Key Points on Solubility:

  • High Reactivity: SO3 reacts readily with water to form sulfuric acid (H2SO4), a highly soluble and significant acid.
  • Physical State: In its gaseous form, sulfur trioxide is not considered soluble in the traditional sense, as it is more about its reactivity than solubility.
  • Exothermic Reaction: The reaction between SO3 and water is exothermic, releasing substantial heat, which can result in hazardous conditions if not managed properly.
  • Concentration Variability: In dilute conditions, the extent of solubility can vary and lead to concentration issues that impact the overall reaction with water.

In conclusion, while sulfur trioxide does not exhibit solubility like many other chemical compounds, its ability to react with water to form sulfuric acid highlights the importance of understanding its behavior with respect to solubility. As noted, "It’s not just about being soluble; it’s about what it can turn into!"

Interesting facts

Discovering the Wonders of Sulfur Trioxide

Sulfur trioxide (S3O3) is a fascinating compound renowned for its role in the production of sulfuric acid and its various industrial applications. As a chemical scientist, understanding its properties and implications in different contexts can be quite enriching. Here are some noteworthy facts about this compound:

  • Key Role in Sulfuric Acid Production: Sulfur trioxide is a vital precursor in the manufacturing of sulfuric acid (H2SO4), one of the most produced industrial chemicals globally. Approximately 60% of sulfur trioxide produced is converted to sulfuric acid.
  • Environmental Impact: Although sulfur trioxide plays a significant role in industrial settings, it is also linked to environmental concerns. When it forms sulfuric acid in the atmosphere, it contributes to acid rain, which can have detrimental effects on ecosystems, architecture, and human health.
  • Physical Properties: Sulfur trioxide is a colorless liquid at room temperature, often noted for being a strong dehydrating agent, able to remove water from materials. Scientists often highlight its ability to form complexes with water, leading to the formation of sulfuric acid upon contact.
  • Reactivity: This compound reacts vigorously with water, releasing a large amount of heat. Therefore, it's essential to handle sulfur trioxide with caution and respect the safety guidelines in place to prevent hazardous situations.
  • Applications Beyond Industry: Interestingly, sulfur trioxide is also utilized in synthesizing various organic compounds and in the production of detergents and dyes, showcasing its versatility.

In conclusion, sulfur trioxide is not only an essential compound in industrial processes but also a crucial element in understanding chemical reactivity and environmental implications. As scientists, the exploration of its properties enriches our comprehension of both chemistry and the world around us.

Synonyms
SULFUR TRIOXIDE
7446-11-9
Sulphur trioxide
NISSO SULFAN
Sulfur oxide (SO3)
HH2O7V4LYD
Sulfur trioxide, stabilized
DTXSID1029673
CHEBI:29384
(SO3)
[SO3]
Sulfan
Schwefeltrioxid
Sulfuric oxide
Anhydride sulfurique
UNII-HH2O7V4LYD
Anhydrid der Schwefelsaure
Sulphuric (acid) anhydride
DTXCID409673
HSDB 6338
SULPHUR TRIOXIDE, STABILIZED
EINECS 231-197-3
SULFUR TRIOXIDE, (STABILIZED)
EC 231-197-3
231-197-3
sulfuric anhydride
Sulfite radical anion
Sulfur trioxide, contains stabilizer, >=99%
oxosulfane dioxide
SULFUR TRIOXIDE [MI]
12210-38-7
MFCD00011452
NS00081874
Q242715