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Iron(II) hydroxide

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Identification
Molecular formula
Fe(OH)2
CAS number
20413-75-6
IUPAC name
iron;dihydrate
State
State

Iron(II) hydroxide is typically found in the form of a solid under normal conditions. When exposed to air, particularly when moist, it oxidizes over time.

Melting point (Celsius)
90.00
Melting point (Kelvin)
363.00
Boiling point (Celsius)
0.00
Boiling point (Kelvin)
0.00
General information
Molecular weight
89.86g/mol
Molar mass
89.8590g/mol
Density
3.4000g/cm3
Appearence

Iron(II) hydroxide appears as a greenish-white powder. It is an inorganic compound that can appear bluish-green and is often found in a gelatinous form when freshly precipitated. Over time, it can oxidize and change color when exposed to air, which may give it a rust-colored appearance due to the formation of iron(III) oxide.

Comment on solubility

Solubility of Iron(II) Dihydrate

Iron(II) dihydrate, with the chemical formula Fe(OH)2·2H2O, is a fascinating compound when it comes to its solubility characteristics. Here are some key points to consider:

  • Water Solubility: Iron(II) dihydrate is characterized by its low solubility in water. This means that only a small amount of the compound can be dissolved in water at room temperature.
  • Effect of pH: Its solubility tends to increase in acidic conditions. At lower pH levels, the formation of soluble iron complexes enhances its solubility.
  • Precipitation: In neutral to alkaline conditions, iron(II) dihydrate can precipitate, leading to the formation of insoluble iron(II) hydroxide, which may affect its availability in various chemical processes.
  • Impact of Temperature: As temperature increases, the solubility of many salts, including iron(II) dihydrate, can also be affected, often resulting in increased solubility.

In summary, the solubility properties of iron(II) dihydrate showcase its dependency on environmental conditions, making it an intriguing subject for further study in the realm of chemical compounds. As quoted, "The solubility of a compound is a key player in its chemical reactivity and biological availability."

Interesting facts

Interesting Facts About Iron(II) Dihydrate

Iron(II) dihydrate, commonly known as ferrous sulfate heptahydrate, has a vital role in a variety of biological and industrial processes. Here are some captivating insights:

  • Essential Mineral: Iron is a critical element in biology, especially as a crucial component of hemoglobin, the protein responsible for transporting oxygen in the blood.
  • Industrial Uses: This compound finds application in wastewater treatment, where it helps in the removal of phosphorus, contributing to cleaner water systems.
  • Colorant: It is often employed as a colorant in various products, including food and cosmetics, leveraging its chemical properties.
  • Historical Significance: The use of iron dates back thousands of years; however, its specific hydration forms have been exploited in medicinal and agricultural applications for a more refined impact.
  • Fertility Booster: In agriculture, iron(II) dihydrate is frequently used in fertilizers, enhancing plant growth by providing iron that is easily absorbed by plants.
  • Oxidation-Reduction Reactions: A fascinating aspect of iron(II) dihydrate is its involvement in redox reactions, making it valuable in electrochemistry.

Moreover, as the compound holds water molecules within its structure, it can serve as a resourceful model for studying hydration in inorganic chemistry, demonstrating the interplay between water and metal ions. Its diverse applications and essential role in various processes make iron(II) dihydrate an essential compound worthy of study.

Synonyms
Iron hydroxide (Fe(OH)2)
Iron dihydroxide
18624-44-7
7JIM5W32UU
DTXSID8066393
EINECS 242-456-5
DTXCID9035888
242-456-5
FERROUS HYDROXIDE
FERROUS HYDROXIDE [MI]
FERROUS HYDROXIDE [WHO-DD]
iron(II) hydroxide
iron;dihydrate
UNII-7JIM5W32UU
SCHEMBL10613874
NS00085862