kMnO4+ (NO2)2 react in acidic medium what is N(reactivity unit) and new equation
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Potassium permanganate
Names
IUPAC name
Potassium manganate(VII)
Other names
Potassium permanganate
Chameleon mineral
Condy's crystals
Permanganate of potash
Hypermangan
Identifiers
CAS Number
7722-64-7
3D model (JSmol)
Interactive image
ChemSpider
22810
ECHA InfoCard
100.028.874
EC Number
231-760-3
KEGG
D02053
PubChem CID
516875
RTECS number
SD6475000
UN number
1490
CompTox Dashboard (EPA)
DTXSID2034839
InChI
[show]
SMILES
[show]
Properties
Chemical formula
KMnO4
Molar mass
158.034 g/mol
Appearance
purplish-bronze-gray needles
magenta–rose in solution
Odor
odorless
Density
2.7 g/cm3[1]
Melting point
240 °C (464 °F; 513 K) (decomposes)
Solubility in water
76 g/L (25 °C)[1]
250 g/L (65 °C)
Solubility
decomposes in alcohol and organic solvents
Magnetic susceptibility (χ)
+20.0·10−6 cm3/mol[2]
Refractive index (nD)
1.59
Structure[3]
Crystal structure
Orthorhombic, oP24
Space group
Pnma, No. 62
Lattice constant
a = 0.909 nm, b = 0.572 nm, c = 0.741 nm
Formula units (Z)
4
Thermochemistry
Heat capacity (C)
119.2 J/mol K
Std molar
entropy (So298)
171.7 J K−1 mol−1
Std enthalpy of
formation (ΔfH⦵298)
−813.4 kJ/mol
Gibbs free energy (ΔfG˚)
-713.8 kJ/mol
Pharmacology
ATC code
D08AX06 (WHO) V03AB18 (WHO)
Hazards
GHS pictograms
NFPA 704
0
2
1
OX
Lethal dose or concentration (LD, LC):
LD50 (median dose)
1090 mg/kg (oral, rat)[4]
Related compounds
Other anions
Potassium manganate
Other cations
Sodium permanganate
Ammonium permanganate
Calcium permanganate
Silver permanganate
Related compounds
Manganese heptoxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
verify (what is ?)
Infobox references
Potassium permanganate is an inorganic chemical compound and medication. As a medication it is used for cleaning wounds and dermatitis.[5]
It has the chemical formula KMnO4 and is a salt consisting of K+ and MnO−
4 ions. It is a strong oxidizing agent. It dissolves in water to give intensely pink or purple solutions, the evaporation of which leaves prismatic purplish-black glistening crystals.[6] In 2000, worldwide production was estimated at 30,000 tonnes.[7] In this compound, manganese is in the +7 oxidation state.
The wholesale cost in the developing world is about US$0.01 per gram of Jump to search
Potassium permanganate
Names
IUPAC name
Potassium manganate(VII)
Other names
Potassium permanganate
Chameleon mineral
Condy's crystals
Permanganate of potash
Hypermangan
Identifiers
CAS Number
7722-64-7
3D model (JSmol)
Interactive image
ChemSpider
22810
ECHA InfoCard
100.028.874
EC Number
231-760-3
KEGG
D02053
PubChem CID
516875
RTECS number
SD6475000
UN number
1490
CompTox Dashboard (EPA)
DTXSID2034839
InChI
[show]
SMILES
[show]
Properties
Chemical formula
KMnO4
Molar mass
158.034 g/mol
Appearance
purplish-bronze-gray needles
magenta–rose in solution
Odor
odorless
Density
2.7 g/cm3[1]
Melting point
240 °C (464 °F; 513 K) (decomposes)
Solubility in water
76 g/L (25 °C)[1]
250 g/L (65 °C)
Solubility
decomposes in alcohol and organic solvents
Magnetic susceptibility (χ)
+20.0·10−6 cm3/mol[2]
Refractive index (nD)
1.59
Structure[3]
Crystal structure
Orthorhombic, oP24
Space group
Pnma, No. 62
Lattice constant
a = 0.909 nm, b = 0.572 nm, c = 0.741 nm
Formula units (Z)
4
Thermochemistry
Heat capacity (C)
119.2 J/mol K
Std molar
entropy (So298)
171.7 J K−1 mol−1
Std enthalpy of
formation (ΔfH⦵298)
−813.4 kJ/mol
Gibbs free energy (ΔfG˚)
-713.8 kJ/mol
Pharmacology
ATC code
D08AX06 (WHO) V03AB18 (WHO)
Hazards
GHS pictograms
NFPA 704
0
2
1
OX
Lethal dose or concentration (LD, LC):
LD50 (median dose)
1090 mg/kg (oral, rat)[4]
Related compounds
Other anions
Potassium manganate
Other cations
Sodium permanganate
Ammonium permanganate
Calcium permanganate
Silver permanganate
Related compounds
Manganese heptoxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
verify (what is ?)
Infobox references
Potassium permanganate is an inorganic chemical compound and medication. As a medication it is used for cleaning wounds and dermatitis.[5]
It has the chemical formula KMnO4 and is a salt consisting of K+ and MnO−
4 ions. It is a strong oxidizing agent. It dissolves in water to give intensely pink or purple solutions, the evaporation of which leaves prismatic purplish-black glistening crystals.[6] In 2000, worldwide production was estimated at 30,000 tonnes.[7] In this compound, manganese is in the +7 oxidation state.
The wholesale cost in the developing world is about US$0.01 per gram of powder