Skip to main content

Nickel(II) ion

ADVERTISEMENT
Identification
Molecular formula
Ni2+
CAS number
22537-14-8
IUPAC name
nickel(2+)
State
State

Nickel(II) ions in their pure ionic form exist in aqueous solution or as part of a salt. The state at room temperature for the ion itself is in solution as part of hydrated or complex ions, whereas solid compounds containing nickel(II) ions are often crystalline solids.

Melting point (Celsius)
1 455.00
Melting point (Kelvin)
1 728.00
Boiling point (Celsius)
2 730.00
Boiling point (Kelvin)
3 003.00
General information
Molecular weight
58.69g/mol
Molar mass
58.6930g/mol
Density
8.9080g/cm3
Appearence

Nickel(II) ion in solution usually forms complex ions that are green in color. In its various solid forms, such as compounds, it may appear as small green or blue crystals or powders.

Comment on solubility

Solubility of Nickel(2+) Ions (Ni2+)

The solubility of nickel(2+) ions (Ni2+) in aqueous solutions varies significantly depending on the chemical environment. When considering their solubility, it's important to note the following points:

  • Complexation: Ni2+ ions can form complexes with various ligands, which often enhances their solubility. For instance, in the presence of ammonia or chloride ions, the solubility increases due to the formation of soluble complexes.
  • Influence of pH: The solubility of Ni2+ is also highly dependent on the pH of the solution. In acidic conditions, Ni2+ remains soluble, whereas in alkaline conditions, it may precipitate as nickel hydroxide, reducing its solubility.
  • Salt Formation: When combined with certain anions, such as nitrate or sulfate, nickel salts can exhibit varying degrees of solubility. For example, nickel sulfate (NiSO4) is highly soluble in water, while nickel carbonate (NiCO3) is notably less soluble.
  • Temperature Effects: Generally, increasing temperature can enhance the solubility of Ni2+ salts in water, making it crucial to consider thermal conditions during solubility assessments.

In summary, the solubility of nickel(2+) ions is influenced by several factors, including the presence of complexing agents, the acidity or basicity of the solution, the choice of accompanying anions, and temperature. Understanding these variables is essential for effectively managing and utilizing Ni2+ in chemical applications.

Interesting facts

Exploring the Fascinating World of Nickel(II) Ions (Ni2+)

Nickel in its divalent form, commonly represented as Ni2+, plays a pivotal role in various biochemical and industrial processes. Here are some intriguing insights into this versatile ion:

  • Biological Significance: Nickel is an essential trace element for some microorganisms and plays a crucial role in various enzymes, particularly in the synthesis of urea.
  • Metallic Versatility: As a transition metal, nickel is known for its remarkable ability to form alloys. When combined with other metals, it enhances strength, corrosion resistance, and durability.
  • Catalytic Properties: Nickel(II) ions are employed as catalysts in many chemical reactions, including hydrogenation processes, making them valuable in both industrial and laboratory settings.
  • Green Chemistry: Due to their effectiveness and lower toxicity compared to some heavy metals, Ni2+ ions are being increasingly utilized in the field of green chemistry, promoting more sustainable practices.
  • Electrochemistry: Nickel(II) serves as a crucial component in rechargeable batteries, particularly in nickel-cadmium and nickel-metal hydride systems, contributing to the advancement of portable energy storage solutions.
  • Biochemical Applications: Nickel(II) complexes have gained attention in medicinal chemistry as potential agents in drug delivery systems, highlighting their relevance in pharmacology and development.

In conclusion, the significance of Ni2+ extends beyond its geological abundance. Its diverse range of applications across biology, industry, and environmental sciences underscores the importance of understanding this dynamic ion.

Synonyms
Nickel(2+)
Nickel cation
nickelous ion
NICKEL (II) ION
Nickel, ion (Ni2+)
Ni2+
Nickel ions
Nickel(II) ion
Nickel(2+)ions
nickel(II) cation
Ni++
nickel(2+) ion
Nickel ion(2+)
14701-22-5
Nickel cation (Ni2+)
OIS2CXW7AM
UNII-OIS2CXW7AM
Ni(2+)
NiII
Nickel(II)
CHEBI:49786
DTXSID60163564
nickel cations
Malleable nickel
Ni cation
Nickel II ion
nickel (II)
Nickel 2+
Nickel 204
Nickel 211
Nickel 212
Nickel 213
Nickel 222
Nickel 223
Nickel 229
ion (Ni2+)
Ni(II)
Epitope ID:137780
CHEMBL56175
DTXCID5086055
CHEBI:25516
VEQPNABPJHWNSG-UHFFFAOYSA-N
BDBM50361477
DB14204
C19609
Q26841248