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Hydrogen iodide

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Identification
Molecular formula
HI
CAS number
10034-85-2
IUPAC name
hydrogen iodide
State
State

Hydrogen iodide is a gas at room temperature.

Melting point (Celsius)
-50.80
Melting point (Kelvin)
222.35
Boiling point (Celsius)
-35.36
Boiling point (Kelvin)
237.79
General information
Molecular weight
127.91g/mol
Molar mass
127.9120g/mol
Density
2.8500g/cm3
Appearence

Hydrogen iodide is a colorless gas at room temperature. It generally has a sharp, irritating odor and forms white fumes of hydroiodic acid upon contact with moist air due to its high affinity for water.

Comment on solubility

Solubility of Hydrogen Iodide

Hydrogen iodide (HI) is a fascinating compound when it comes to its solubility properties. This compound is characterized by the following:

  • Highly soluble in water: Hydrogen iodide is known for its remarkable solubility in water, forming a strong acidic solution.
  • Polar character: Due to the polar covalent bond between hydrogen and iodine, HI readily interacts with water molecules, allowing it to easily dissolve.
  • Concentration effects: The solubility of HI can lead to concentrated solutions, and in higher concentrations, it behaves as a strong acid, releasing H+ ions in aqueous solution.

In practical applications, this high solubility facilitates a variety of chemical reactions. For instance, solutions of hydrogen iodide can effectively participate in:

  • Halogenation reactions
  • As a source of iodide ions in organic synthesis

Furthermore, when discussing solubility, it's essential to consider that factors such as temperature and purity of the solvent can influence the extent to which hydrogen iodide can dissolve.

In summary, hydrogen iodide's solubility in water exemplifies the interaction between polar compounds and solvents, making it a critical reagent in both industrial processes and laboratory settings.

Interesting facts

Interesting Facts About Hydrogen Iodide

Hydrogen iodide, or HI, is a fascinating compound that plays several important roles in both industrial and laboratory settings. Here are some notable aspects:

  • Strong Acidic Nature: When dissolved in water, hydrogen iodide forms hydroiodic acid, which is considered one of the strongest acids. This property makes it significant in acid-base reactions and chemical synthesis.
  • Use in Organic Synthesis: Hydrogen iodide is widely used in organic chemistry to synthesize various iodinated compounds. Iodine is essential for the production of certain pharmaceuticals and agrochemicals.
  • Redox Reactions: The compound participates in redox reactions, showcasing the ability of iodine to undergo oxidation, which is crucial in various chemical processes.

Safety Considerations

Working with hydrogen iodide requires careful handling due to its corrosive nature. Scientists and students must use appropriate protective equipment and work in well-ventilated areas to mitigate health risks. As the famous chemist Linus Pauling once said, "The best way to have a good idea is to have lots of ideas." This resonates well with the spirit of experimentation involved in chemistry, where understanding hazardous compounds is vital.

Applications in Research

In the field of research, hydrogen iodide is utilized for:

  • Producing high-purity iodine compounds.
  • The development of analytical methods to identify various substances.
  • Investigating the properties of molecules in spectroscopy.

In summary, hydrogen iodide is a compound that not only showcases the remarkable properties of halogens but also serves as a crucial tool in the chemical industry and research environments.

Synonyms
Hydriodic acid
HYDROGEN IODIDE
10034-85-2
Hydroiodic acid
Jodwasserstoff
Hyriodic acid
Acido yodhidrico
Acide iodhydrique
Hydrogen iodide (HI)
Caswell No. 482C
Hydrogeniodid
Iodwasserstoff
Anhydrous hydriodic acid
Wasserstoffiodid
CHEBI:43451
Hydrogen iodide, anhydrous
Iodure d'hydrogene anhydre
Yoduro de hidrogeno anhidro
Acide iodhydrique [French]
Acido yodhidrico [Spanish]
iodure d'hydrogene
694C0EFT9Q
IOHYDROIC ACID
HSDB 2155
Iodure d'hydrogene anhydre [French]
EINECS 233-109-9
UN2197
Yoduro de hidrogeno anhidro [Spanish]
EPA Pesticide Chemical Code 046912
HYDRIODIC ACID [MI]
HYDROGEN IODIDE [MI]
HYDRIODIC ACID [VANDF]
HYDROGEN IODIDE [HSDB]
HYDRIODIC ACID [MART.]
HYDROGEN IODIDE [VANDF]
DTXSID2044349
Acide iodhydrique (French)
Acido yodhidrico (Spanish)
HYDRIODIC ACID (MART.)
Iodure d'hydrogene anhydre (French)
HYDROGEN IODIDE, (ANHYDROUS)
HYDROGEN IODIDE, [ANHYDROUS]
Yoduro de hidrogeno anhidro (Spanish)
iodidohydrogen
Caswell no 482C
UN1787 (solution)
HYDROGEN MONOIODIDE
DTXCID0024349
USEPA/OPP Pesticide Code: 46912
233-109-9
iodane
yodo
Iodine-125
IODINE, ATOMIC
hydroiodide
CHEBI:24859
hydriodide
Hydriotic acid
MFCD00011347
53I
IOD
UNII-694C0EFT9Q
Atomic iodine
iodine (atomic)
UN1787
SCHEMBL526
Epitope ID:117415
UNII-GVO776611R
5D3DB66WM3
SCHEMBL6344536
CHEMBL1233550
DTXSID501014231
BDBM50499191
AKOS015833254
AKOS015853961
Hydriodic acid [UN1787] [Corrosive]
FH168184
H1221
Hydriodic acid - 57 wt. % aqueous solution
Q2462
Hydriodic acid, puriss. p.a., >=67% (T)
Hydriodic acid, purum p.a., 55-59% (T)
C05590
Hydriodic acid, JIS special grade, 55.0-58.0%
Hydrogen iodide, anhydrous [UN2197] [Poison gas]
Hydriodic acid, contains No stabilizer, ACS reagent, 55%
Hydriodic acid, puriss. p.a., ACS reagent, >=47% (T)
Hydriodic acid, 57 wt. % in H2O, distilled, stabilized, 99.95%
Hydriodic acid, 57 wt. %, distilled, 99.999% trace metals basis
Hydriodic acid, contains <=1.5% hypophosphorous acid as stabilizer, ACS reagent, >=47.0%
Hydriodic acid, contains No stabilizer, distilled, 57 wt. % in H2O, 99.99% trace metals basis
I-H