Permanganic acid
Permanganic acid is an inorganic compound with formula HMnO4.
- 1Names
- 2Formulae and structures
- 3Properties
- 4Constituents
- 5Thermodynamic properties
- 6Solubility
- 7Preparations
- 8Chemical reactions
- 9Related substances
- 10Related categories
Names
List of substance names
- Typical name
- Permanganic acid
- Compositional nomenclature
- Hydrogen permanganate
- Additive nomenclature
- Hydroxidotrioxidomanganese
- Hydrogen nomenclature
- Hydrogen(tetraoxidomanganate)(1−)
- IUPAC acceptable common names
- Permanganic acid
- Other names
- Manganic(VII) acid
Formulae and structures
List of formulae
- Typical formula
- HMnO4
- Molecular formula
- HMnO4
- Compositional formula
- HMnO4
- Structural formula
- Other structural formulas
- Lewis structure
- Colored Lewis structure
Properties
List of substance properties
- Name
- Permanganic acid
- Formula
- HMnO4
- Appearance
- Purple solid
- Odor
- Odorless
- Molar mass
- 119.942 g/mol
- Density
- –
- Melting point
- –
- Boiling point
- –
Constituents
Constituent atoms
| Atom | Name | Oxidation state | Number |
|---|---|---|---|
| H | Hydrogen | +1 | 1 |
| Mn | Mangenese | +7 | 1 |
| O | Oxygen | −2 | 4 |
Ratio of atoms
| Atom | Atomic weight | Number | Atomic ratio | Weight ratio |
|---|---|---|---|---|
| H | 1.008 | 1 | 16.67% | 0.84% |
| Mn | 54.938 | 1 | 16.67% | 45.80% |
| O | 15.999 | 4 | 66.67% | 53.36% |
Thermodynamic properties
Phase transition properties
- Enthalpy of fusion
- –
- Enthalpy of vaporization
- –
- Enthalpy of vaporization at 25°C
- –
- Enthalpy of other transition
- –
Solubility
Qualitative solubility
Preparations
Reaction of acidic oxide and water
The reaction of manganese(VII) oxide and water yields permanganic acid.
Chemical reactions
Electrolytic dissociation
Electrolytic dissociation of permanganic acid yields hydrogen ion and permanganate ion.
Reaction with base
The reaction of permanganic acid and base yields salt and water.
Reaction with basic oxide
The reaction of basic oxide and permanganic acid yields salt and water.
Reaction with salt of weak acid
The reaction of salt of weak acid and permanganic acid yields salt of strong acid and weak acid.
Reaction with salt of volatile acid
The reaction of salt of volatile acid and permanganic acid yields salt of non volatile acid and volatile acid.
Reaction with dehydrating acidic oxide
The reaction of permanganic acid and dehydrating acidic oxide yields manganese(VII) oxide and oxoacid.
Reaction with inactive metal
The reaction of and permanganic acid yields silver(I) permanganate, manganese(IV) oxide, and water.
Reaction with self-redoxing species
The reaction of self-redoxing species and permanganic acid yields a variety of products.
Reaction with reducing species
The reaction of reducing species and permanganic acid yields a variety of products.
Reaction with oxidizable species
The reaction of oxidizable species and permanganic acid yields a variety of products.
Reaction with oxidizable species under acidic condition
The reaction of oxidizable species, permanganic acid, and hydrogen ion yields a variety of products.
Reaction with hardly oxidizable species
The reaction of hardly oxidizable species and permanganic acid yields a variety of products.
Reaction with hardly oxidizable species under acidic condition
The reaction of hardly oxidizable species, permanganic acid, and hydrogen ion yields a variety of products.
Precipitation reaction
When a certain chemical species is present in aqueous solution, it reacts with permanganic acid to form a precipitate.
Electrolysis of aqueous solution
Electrolysis of aqueous permanganic acid yields a variety of products.
Decomposition
Decomposition of permanganic acid yields a variety of products.
