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Cobalt(II) chloride hexahydrate

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Identification
Molecular formula
CoCl2·6H2O
CAS number
16683-27-5
IUPAC name
cobalt;trihydrate
State
State

At room temperature, cobalt(II) chloride hexahydrate is typically a solid.

Melting point (Celsius)
86.00
Melting point (Kelvin)
359.00
Boiling point (Celsius)
1 049.00
Boiling point (Kelvin)
1 322.00
General information
Molecular weight
237.93g/mol
Molar mass
237.9310g/mol
Density
1.9240g/cm3
Appearence

Cobalt(II) chloride hexahydrate appears as purple or pink crystalline solid. Its color can change depending on relative humidity and it is commonly used as a humidity indicator.

Comment on solubility

Solubility of Cobalt(II) Trihydrate

Cobalt(II) trihydrate, or Co(H2O)3, has unique solubility characteristics that are essential for various applications. When considering its solubility, several key points should be noted:

  • Solubility in Water: Cobalt(II) trihydrate is generally soluble in water, making it a suitable candidate for numerous aqueous reactions.
  • Temperature Dependence: The solubility of cobalt(II) compounds can be influenced by temperature. As temperature increases, the solubility tends to rise.
  • pH Sensitivity: The solubility is also affected by the pH of the solution. In acidic conditions, cobalt(II) exists in a more soluble form compared to neutral or alkaline conditions.
  • Complexation: Cobalt(II) can form complexes with various ligands, which can enhance its solubility in certain environments, such as in the presence of organic compounds.

Overall, while cobalt(II) trihydrate is relatively soluble in water, its solubility can be influenced by environmental factors. As noted, "the medium is everything" when it comes to understanding how cobalt interacts in different chemical settings.

Interesting facts

Interesting Facts about Cobalt Trihydrate

Cobalt tri-hydrate is one of the intriguing compounds of cobalt, displaying fascinating properties and applications that make it a subject of study for chemists and students alike. Here are some noteworthy aspects of this compound:

  • Composition: Cobalt tri-hydrate contains cobalt surrounded by three water molecules, which contributes to its unique properties and reactivity.
  • Color Transformation: One of the striking features of cobalt compounds is their vivid colors. Cobalt tri-hydrate exhibits a rich blue hue when hydrated, a characteristic that makes it popular for both educational demonstrations and artistic applications.
  • Catalytic Applications: Cobalt compounds, including tri-hydrate, are often utilized in catalytic processes due to their effectiveness in speeding up chemical reactions without being consumed.
  • Metallurgical Importance: In metallurgy, cobalt plays a crucial role in producing high-strength alloys and hard metals, showcasing its practicality beyond just chemical properties.
  • Health Aspects: As with many transition metals, cobalt is essential in trace amounts for human health but can be toxic at higher concentrations, emphasizing the need for careful handling and study.

In summary, cobalt tri-hydrate is not just a simple compound; it intertwines with various fields such as medicine, art, and industrial applications. As a result, it continues to be a captivating subject for further exploration and research in the world of chemistry.

Synonyms
1307-86-4
Cobalt(III) hydroxide
cobalt trihydrate
Cobalt trihydroxide
cobalt;trihydrate
Kobalttrihydroxyd
EINECS 215-153-0
UNII-S42YMM16W7
Cobalt hydroxide(Co(OH)3) (6CI,7CI,8CI,9CI)
AKOS015914253
EC 215-153-0