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Magnesium ion

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Identification
Molecular formula
Mg2+
CAS number
22537-45-9
IUPAC name
magnesium(2+)
State
State

As an ion, magnesium (Mg2+) exists in solution typically as part of various salts. The elemental form of magnesium is solid at room temperature; however, in ionic form, magnesium is encountered in aqueous solutions or crystallized as part of a salt.

Melting point (Celsius)
650.00
Melting point (Kelvin)
923.00
Boiling point (Celsius)
1 090.00
Boiling point (Kelvin)
1 363.00
General information
Molecular weight
24.31g/mol
Molar mass
24.3050g/mol
Density
1.7380g/cm3
Appearence

The magnesium ion, Mg2+, does not have a distinctive appearance in its isolated form. Typically, it is encountered as a colorless solution when dissolved in water as part of salts such as magnesium chloride or magnesium sulfate. As a solid, it is often part of a crystalline ionic compound which may vary in color depending on the associated anion.

Comment on solubility

Solubility of Mg2+

The ion Mg2+, representing magnesium in its divalent cation form, displays unique solubility characteristics that are essential to understand within various chemical contexts.

Solubility in Water: Mg2+ is known for its high solubility in water. It commonly forms soluble salts, including:

  • Magnesium chloride (MgCl2)
  • Magnesium sulfate (MgSO4)
  • Magnesium nitrate (Mg(NO3)2)

This means that in aqueous solutions, the presence of Mg2+ ions is typically substantial, allowing them to play critical roles in various chemical reactions and biological processes.

Complexation and Precipitation: The solubility can be affected by several factors such as:

  • pH levels in the solution
  • The presence of complexing agents (like ethylenediaminetetraacetic acid, EDTA)
  • Temperature

For example, the solubility may decrease when forming insoluble compounds with anions like hydroxide (OH-) and carbonate (CO32-), leading to precipitation of magnesium hydroxide (Mg(OH)2). As a result, the equilibrium between soluble and insoluble forms is crucial in various applications.

Conclusion: Understanding the solubility of Mg2+ is paramount, as it influences chemical behaviors and biological availability in multiple disciplines, ranging from agriculture to pharmaceuticals.

Interesting facts

Interesting Facts About Magnesium (Mg2+)

Magnesium is a fascinating and essential element, playing a crucial role in both chemistry and biological systems. Here are some intriguing aspects of the magnesium ion:

  • Biological Importance: Mg2+ is vital for life, participating in over 300 enzymatic reactions. It serves as a cofactor for many enzymes involved in DNA and RNA synthesis.
  • Electrolyte Function: As an important electrolyte, magnesium helps regulate nerve and muscle function, blood sugar levels, and blood pressure, contributing to overall health and well-being.
  • Complex Formation: Magnesium ions can form complexes with various biomolecules, stabilizing the structures of proteins and nucleic acids, which is essential for cellular function.
  • Natural Sources: Common sources of magnesium include green leafy vegetables, nuts, seeds, whole grains, and legumes, making it accessible in a balanced diet.
  • Magnesium in Industry: Beyond biological functions, Mg2+ plays an important role in various industrial applications, such as the manufacture of fireworks, where it produces bright white flames.

As a student of chemistry, diving into the properties and reactions involving the magnesium ion can reveal a complex but rewarding field of study. Understanding its behavior in solution, coordination chemistry, and its role in biological applications is a key area of research that continues to unfold.

"Magnesium is not just another metal; it's a crucial player in the chemistry of life itself."

Synonyms
magnesium ion
magnesium(2+)
Magnesium cation
22537-22-0
Magnesium, ion (Mg2+)
Mg++
Mg2+
Neuropeptide Y (1-27)
magnesium(2+) ion
Magnesium, ion(Mg2+)
Magnesium (ion)
Magnesium 2+
MgII
Magnesium(2+)ions
T6V3LHY838
magnesium(II) cation
UNII-T6V3LHY838
magnesium, ion (Mg(2+))
3-Cyano-4-imino-7-chloro-4H-pyrido[1,2-a]-pyrimidine
MAGNESIUM ION CHROMATOGRAPHY STANDARD
102781-35-1
133361-35-0
CHEBI:18420
Mg(2+)
magnesium, doubly charged positive ion
Magnesium dication
MAGNESIUM(II)
Magnesane
Magnesium ions
Diarrhea Dyspepsia
Magnesium (2+)
Magnesium (II) ion
Magnesium ion (2+)
Constipation Billousness
Menstrual Muscle Cramps
Magnesium cation (2+)
Mg(II)
BDBM15
Mg+2
CHEBI:39127
DTXSID801020091
DB01378
C00305
L000763
Q26987404