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Magnesium Alum (octahydrate)

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Identification
Molecular formula
Mg2Al(OH)2(SO4)2•8H2O
CAS number
22199-08-2
IUPAC name
dimagnesium;alumane;dihydroxide;sulfate;octahydrate
State
State

Magnesium alum octahydrate is a solid at room temperature, typically found as crystalline. The crystals are generally soluble in water, resulting in acidic solutions.

Melting point (Celsius)
86.50
Melting point (Kelvin)
359.65
Boiling point (Celsius)
330.00
Boiling point (Kelvin)
603.00
General information
Molecular weight
534.93g/mol
Molar mass
534.9280g/mol
Density
1.6800g/cm3
Appearence

Magnesium alum, specifically in its octahydrate form, appears as colorless or white crystalline solid. It often forms octahedral crystals and is commonly found in hydrated form.

Comment on solubility

Solubility of Dimagnesium Alumane Dihydroxide Sulfate Octahydrate

Dimagnesium alumane dihydroxide sulfate octahydrate, with the chemical formula Mg2Al(OH)2(SO4)2•8H2O, exhibits interesting solubility characteristics that are influenced by its ionic composition and the presence of water of hydration.

Key Points on Solubility:

  • Highly Soluble in Water: This compound is generally soluble in water due to the presence of sulfate ions (SO42-), which enhance its solubility.
  • Role of Hydration Water: The eight molecules of water (8H2O) contribute to the stability and solvation of the ions in aqueous solution, promoting dissolution.
  • Temperature Dependence: Like many salts, its solubility can increase with temperature, making it more soluble in warm water.
  • pH Influence: The solubility may be affected by the pH of the solution. In acidic conditions, the solubility is typically greater due to protonation reactions.

In summary, the solubility of Mg2Al(OH)2(SO4)2•8H2O is a defining characteristic that enables its applications in various chemical contexts. Its aqueous solubility is enhanced by factors such as ionic composition, temperature, and solution pH.

Interesting facts

Interesting Facts about Dimagnesium Alumane Dihydroxide Sulfate Octahydrate

Dimagnesium alumane dihydroxide sulfate octahydrate is a fascinating compound that plays an important role in several scientific fields, particularly in materials science and environmental chemistry. Here are some compelling points about this compound:

  • Cationic Structure: It contains magnesium ions which contribute to its unique cationic structure. The presence of both magnesium and aluminum makes it noteworthy in the study of mixed metal hydroxides.
  • Hydration Significance: The octahydrate component indicates that this compound can hold eight molecules of water, emphasizing its importance in hydration chemistry and how it may impact chemical properties, reactivity, and stability.
  • Applications in Agriculture: Due to its sulfate content, this compound can potentially be utilized in soil conditioning and as a fertilizer additive, enriching the nutrient content available for crops.
  • Environmental Benefits: Research suggests that compounds like this can aid in water purification processes. The hydroxide ions can help neutralize acidic pollutants, making it a candidate for environmental remediation efforts.
  • Research and Development: Scientists are investigating its properties for applications in energy storage technologies, particularly as part of battery systems, where stability and ionic conductivity are paramount.

In conclusion, dimagnesium alumane dihydroxide sulfate octahydrate exemplifies how complex interactions among metals can lead to compounds with diverse applications. Its hydration and structural features not only contribute to its chemical behavior but also open doors for innovative uses in various scientific disciplines. As stated by renowned chemists, "Every compound tells a story, and this one is rich with potential."