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Chromium(III) ion

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Identification
Molecular formula
Cr3+
CAS number
16065-83-1
IUPAC name
chromium(3+)
State
State

Chromium(III) ion is commonly found in aqueous solution or salts at room temperature.

Melting point (Celsius)
0.00
Melting point (Kelvin)
0.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
52.00g/mol
Molar mass
51.9960g/mol
Density
0.0000g/cm3
Appearence

Chromium(III) ion in solution typically appears violet or green depending on the ligands present.

Comment on solubility

Solubility of Chromium(III) Compounds

Chromium(III) compounds, represented as Cr3+, are known for their diverse solubility characteristics depending on their specific chemical forms. Here are some key points to consider:

  • General Solubility: Many chromium(III) salts are moderately soluble in water, which means they can dissolve to a certain extent but may not achieve saturation easily.
  • Sulfates and Nitrates: Compounds such as chromium(III) sulfate (Cr2(SO4)3) and chromium(III) nitrate [Cr(NO3)3] generally exhibit good solubility in water.
  • Oxides and Hydroxides: In contrast, chromium(III) oxide (Cr2O3) is largely insoluble in water, while chromium(III) hydroxide (Cr(OH)3) demonstrates limited solubility.
  • pH Influence: The solubility of chromium(III) compounds can also be significantly influenced by the pH of the solution—higher acidity tends to enhance their solubility.

Overall, the solubility of chromium(III) compounds varies widely, but it is crucial to take into account the specific type of compound and environmental conditions when assessing their behavior in aqueous solutions. As the saying goes, "Solubility is a matter of chemistry," as the interactions of ions and molecules play a vital role in determining how well these compounds will dissolve.

Interesting facts

Interesting Facts about Chromium(III) Ions

Chromium(III), often represented as Cr3+, plays a critical role in various biological and industrial processes. Here are some intriguing facts that highlight its significance:

  • Biological Importance: Chromium(III) is an essential trace element for humans, contributing to glucose metabolism and insulin sensitivity. It helps to enhance the action of insulin and is involved in the regulation of carbohydrate, fat, and protein metabolism.
  • Environmental Role: Chromium is naturally found in the environment, primarily in minerals. However, its oxidation state plays a crucial role in determining its environmental impact. While Cr3+ is generally considered safe, Cr6+ compounds are highly toxic and carcinogenic.
  • Colorful Compounds: Chromium(III) ions are renowned for their vibrant colors. They form various hydrated complexes that range from green to violet hues, adding beauty and vibrancy to industrial applications.
  • Industrial Use: Chromium(III) salts are widely used in the manufacturing of glass, ceramics, and dyes. They are also important in the production of pigments, with chromium oxide being a popular green pigment in paints.
  • Alloying Agent: In metallurgy, Cr3+ is vital as a component in steel, enhancing strength, toughness, and resistance to corrosion. This property is particularly valuable in stainless steel production.
  • Complex Formation: Chromium(III) tends to form stable complexes with various ligands, leading to significant applications in coordination chemistry. These complexes are pivotal in catalysis and material science.

In summary, chromium(III) ions embody a fascinating intersection of health, environmental science, and industrial innovation. Their diverse roles demonstrate how a single ion can impact various facets of our lives!

Synonyms
Chromium(III)
Chromic ion
chromium(3+)
Chromic cation
Chromium(III) cation
Chromium (3+)
Chromium ion (3+)
16065-83-1
Cr3+
chromium(3+) ion
Chromium(III) ion
Chromium cation (3+)
Chromium cation (Cr3+)
Cr(3+)
Cr(III)
CHEBI:49544
X1N4508KF1
CHROMIUM (MART.)
CHROMIUM [MART.]
Chromium, ion (Cr3)
Chromium 3+
Chromium ion(Cr3+)
Chromium(3+) ions
Chromium(3+)ion
UNII-X1N4508KF1
CHROMIUM (III)
Chromium (III) ion
Chromium, ion (cr3+)
Chromium (III) Standard: Cr+3 @ 100 microg/mL in 2% HNO3
DTXSID2023981
SCHEMBL29353868
c0804
DB14525
NS00134110
Q26841311