2NH4MnO4 + 5e− → 2NH3↑ + Mn(OH)2 + MnO4− + 2O2−
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- Reduction of ammonium permanganate
- 2NH4MnO4Ammonium permanganate + 5e−Electron2NH3↑Ammonia + Mn(OH)2Manganese(II) hydroxide + MnO4−Permanganate ion + 2O2−Oxide ion⟶
Reduction of ammonium permanganate yields ammonia, manganese(II) hydroxide, permanganate ion, and oxide ion (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reduction of ammonium permanganate
- 2NH4MnO4Ammonium permanganate + 5e−Electron2NH3↑Ammonia + Mn(OH)2Manganese(II) hydroxide + MnO4−Permanganate ion + 2O2−Oxide ion⟶
General equation
- Reduction of reducible species
- ReactantOxidizing agent + e− ⟶ ProductReduction product
Oxidation state of each atom
- Reduction of ammonium permanganate
Reactants
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
NH4MnO4 | Ammonium permanganate | 2 | Oxidizing | – |
e− | Electron | 5 | – | Electron |
Products
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
NH3 | Ammonia | 2 | – | – |
Mn(OH)2 | Manganese(II) hydroxide | 1 | Reduced | – |
MnO4− | Permanganate ion | 1 | – | – |
O2− | Oxide ion | 2 | – | – |
Thermodynamic changes
Thermodynamic data of reactants
Chemical formula | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
---|---|---|---|---|
NH4MnO4 | – | – | – | – |
e− | – | – | – | – |
Thermodynamic data of products
Chemical formula | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
---|---|---|---|---|
NH3 (g) | -46.11[1] | -16.45[1] | 192.45[1] | 35.06[1] |
NH3 (ao) | -80.29[1] | -26.50[1] | 111.3[1] | – |
Mn(OH)2 (am) precipitated | -695.4[1] | -615.0[1] | 99.2[1] | – |
MnO4− (ao) | -541.4[1] | -447.2[1] | 191.2[1] | -82.0[1] |
O2− | – | – | – | – |
* (g):Gas, (ao):Un-ionized aqueous solution, (am):Amorphous solid
References
List of references
- 1Janiel J. Reed (1989)The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI UnitsNational Institute of Standards and Technology (NIST)
- ^ ΔfH°, -46.11 kJ · mol−1
- ^ ΔfG°, -16.45 kJ · mol−1
- ^ S°, 192.45 J · K−1 · mol−1
- ^ Cp°, 35.06 J · K−1 · mol−1
- ^ ΔfH°, -80.29 kJ · mol−1
- ^ ΔfG°, -26.50 kJ · mol−1
- ^ S°, 111.3 J · K−1 · mol−1
- ^ ΔfH°, -695.4 kJ · mol−1
- ^ ΔfG°, -615.0 kJ · mol−1
- ^ S°, 99.2 J · K−1 · mol−1
- ^ ΔfH°, -541.4 kJ · mol−1
- ^ ΔfG°, -447.2 kJ · mol−1
- ^ S°, 191.2 J · K−1 · mol−1
- ^ Cp°, -82.0 J · K−1 · mol−1