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Potassium permanganate

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Identification
Molecular formula
KMnO4
CAS number
7722-64-7
IUPAC name
permanganate
State
State

At room temperature, potassium permanganate is a solid. It is often available in the form of granules or powder and is stable under normal temperatures and pressures.

Melting point (Celsius)
240.00
Melting point (Kelvin)
513.15
Boiling point (Celsius)
100.00
Boiling point (Kelvin)
373.15
General information
Molecular weight
158.03g/mol
Molar mass
158.0340g/mol
Density
2.7030g/cm3
Appearence

Potassium permanganate appears as a dark purple or bronze-colored crystalline solid. The crystals have a distinct metallic sheen and are highly soluble in water. When dissolved, it imparts a lovely deep purple to pink hue to the water, depending on concentration. Potassium permanganate is known for its vivid color and is frequently used in various laboratory and industrial processes for its oxidizing properties.

Comment on solubility

Solubility of Permanganate Compounds

Permanganate ions, commonly represented as MnO4-, exhibit remarkable solubility characteristics, particularly in aqueous solutions. When discussing solubility, it is important to recognize several vital points:

  • Highly Soluble: Most permanganate salts, such as potassium permanganate (KMnO4), are highly soluble in water, often dissolving to form a vivid purple solution.
  • Temperature Dependence: Like many ionic compounds, the solubility of permanganates generally increases with temperature, allowing for better dissolution in warmer conditions.
  • pH Sensitivity: The solubility of permanganates can also be influenced by the pH of the solution, with acidic conditions sometimes enhancing their stability and solubility.
  • Complex Formation: In some cases, permanganates can form complexes with various ligands, affecting their solubility in certain environments.

In summary, while permanganate ions are known for their exceptional solubility, their behavior can be influenced by factors such as temperature and pH. The solubility of permanganate salts is a noteworthy property that underscores their usefulness in various chemical applications.

Interesting facts

Interesting Facts about Permanganate

Permanganate is a fascinating and versatile chemical compound widely recognized for its striking purple color and powerful oxidizing properties. With a rich history in various applications, its significance spans across many fields.

Key Applications

  • Sanitizing Agent: Permanganate is widely used in water treatment processes to remove impurities and harmful microorganisms.
  • Analytical Chemistry: It serves as a strong oxidizing agent in redox titrations, helping chemists determine the concentration of reducing agents.
  • Medicine: In diluted forms, it is utilized in wound treatment and dermatology for its antiseptic properties.

Interesting Facts

  • Color Changes: The vivid purple color of permanganate is a result of its unique electronic structure, which allows it to absorb specific wavelengths of light.
  • Oxidizing Power: Permanganate can oxidize a variety of organic compounds and inorganic ions, making it invaluable in both laboratory and industrial settings.
  • Environmental Impact: Its ability to break down organic pollutants highlights its importance in environmental remediation processes.
  • Historical Relevance: Permanganate has been used since the 18th century, showcasing its long-standing role in scientific research and applications.

Overall, permanganate stands out not only for its captivating purple hue but also for its multifaceted applications that play a crucial role in science and industry. Its versatility and effectiveness make it a compound of great interest to both chemists and students alike.

Synonyms
Permanganate
permanganate ion
14333-13-2
Permanganat
Manganat(VII)
2BL953CCZ2
tetraoxomanganate(1-)
tetraoxomanganate(VII)
tetraoxidomanganate(1-)
PERMANGANATE (MNO4-)
MnO4(-)
CHEBI:25939
DTXSID90912340
(MnO4)(-)
[MnO4](-)
DTXCID801341362
Permanganate (MnO41-)
UNII-2BL953CCZ2
OXIDO-TRIOXO-MANGANESE
NPDODHDPVPPRDJ-UHFFFAOYSA-N
Permanganate ion; Permanganate ion(1-)
PD163664
Q410407