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Copper(II) ion

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Identification
Molecular formula
Cu2+
CAS number
15158-11-9
IUPAC name
copper(2+)
State
State

The Copper(II) ion is typically found in aqueous solution where it remains solvated by water molecules.

Melting point (Celsius)
1 085.00
Melting point (Kelvin)
1 358.15
Boiling point (Celsius)
2 567.00
Boiling point (Kelvin)
2 840.00
General information
Molecular weight
63.55g/mol
Molar mass
63.5460g/mol
Density
8.9600g/cm3
Appearence

The copper(II) ion itself is not isolated in pure form, and its salts or aqueous solutions are typically blue-green in appearance. This coloration arises from the d-d electron transitions in copper complexes.

Comment on solubility

Solubility of Copper(II) Compounds

Copper(II) ions, represented as Cu2+, exhibit varied solubility properties based on their chemical environment and the anions they are paired with. Generally, the solubility of copper(II) salts can be summarized as follows:

  • Water Solubility: Many copper(II) compounds are soluble in water. For instance, copper(II) sulfate (CuSO4) is highly soluble, while others may be less so.
  • Insoluble Compounds: Copper(II) oxides, such as copper(II) oxide (CuO) and certain phosphates, demonstrate low solubility in water.
  • Dependence on pH: The solubility of copper(II) salts can change with pH variations. For example, more soluble forms may occur in acidic solutions.

In conclusion, the solubility of Cu2+ compounds is influenced by factors such as anion type, pH, and temperature. This variability is crucial in various applications, from industrial processes to biological systems. As noted, "the solubility dictates both the reactivity and the availability of copper(II) ions in different chemical environments."

Interesting facts

Interesting Facts About Copper(II) Ions

Copper(II) ions, commonly denoted as Cu2+, play an essential role in various chemical, biological, and environmental processes. Here are some intriguing aspects of this fascinating compound:

  • Essential Trace Element: Copper is a vital trace element in biological systems. It is crucial for the functioning of several enzymes that facilitate metabolic processes in living organisms.
  • Catalyst for Reactions: The Cu2+ ions act as effective catalysts in numerous oxidation-reduction reactions, making them significant in industrial applications and organic synthesis.
  • Color Change Indicator: One of the most visually striking properties of copper(II) ions is their characteristic blue color in solution, which can change in presence of different ligands, illustrating the concept of coordination chemistry beautifully.
  • Biochemical Significance: Copper(II) is involved in processes such as iron metabolism and the formation of hemoglobin, underscoring its importance in human health.
  • Environmental Impact: While copper is necessary for life, excessive copper(II) concentrations can be toxic to aquatic systems, highlighting the need for careful monitoring in environmental chemistry.

To sum up, copper(II) ions are not just a simple ionic compound; they are pivotal in many areas including biochemistry, industrial chemistry, and environmental science. Their multifaceted roles continue to be a rich field for study and exploration.

Synonyms
cupric ion
Cupric cation
copper(2+)
Copper, ion (Cu2+)
Copper ions
Copper(2+)ions
Copper(II)ions
15158-11-9
Copper (II) ion
Copper ion (Cu++)
Cu2+
copper(II)
copper(II) cation
Cu(2+)
Cu++
Cu+2
CHEBI:29036
8CBV67279L
cupric copper
UNII-8CBV67279L
Copper Ion
copper(II) ions
CuII
copper (II)
Cu(II)
ion (Cu2+)
at. no. 29
Epitope ID:174839
SCHEMBL29355672
DTXSID40934294
DB14552
C22424