Mn(NO3)2 + 2e− → Mn2+ + NO2− + NO2+ + 2O2−
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- Reduction of manganese(II) nitrate
- Mn(NO3)2Manganese(II) nitrate + 2e−ElectronMn2+Manganese(II) ion + NO2−Nitrite ion + NO2+Nitronium ion + 2O2−Oxide ion⟶
Reduction of manganese(II) nitrate yields manganese(II) ion, nitrite ion, nitronium 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 manganese(II) nitrate
- Mn(NO3)2Manganese(II) nitrate + 2e−ElectronMn2+Manganese(II) ion + NO2−Nitrite ion + NO2+Nitronium ion + 2O2−Oxide ion⟶
General equation
- Reduction of reducible species
- ReactantOxidizing agent + e− ⟶ ProductReduction product
Oxidation state of each atom
- Reduction of manganese(II) nitrate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Mn(NO3)2 | Manganese(II) nitrate | 1 | Oxidizing | – |
| e− | Electron | 2 | – | Electron |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Mn2+ | Manganese(II) ion | 1 | – | – |
| NO2− | Nitrite ion | 1 | Reduced | – |
| NO2+ | Nitronium 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 |
|---|---|---|---|---|
| Mn(NO3)2 (cr) | -576.26[1] | – | – | – |
| Mn(NO3)2 (ai) | -635.5[1] | -450.9[1] | 218[1] | -121[1] |
| Mn(NO3)2 (vit) 6 hydrate | -2371.9[1] | – | – | – |
| Mn(NO3)2 (l) 6 hydrate | -2331.62[1] | – | – | – |
| e− | – | – | – | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (vit):Vitreous liquid, (l):Liquid
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 |
|---|---|---|---|---|
| Mn2+ (g) | 2519.69[1] | – | – | – |
| Mn2+ (ao) | -220.75[1] | -228.1[1] | -73.6[1] | 50[1] |
| NO2− (ao) | -104.6[1] | -32.2[1] | 123.0[1] | -97.5[1] |
| NO2+ (g) | 967.8[1] | – | – | – |
| O2− | – | – | – | – |
* (g):Gas, (ao):Un-ionized aqueous solution
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°, -576.26 kJ · mol−1
- ^ ΔfH°, -635.5 kJ · mol−1
- ^ ΔfG°, -450.9 kJ · mol−1
- ^ S°, 218. J · K−1 · mol−1
- ^ Cp°, -121. J · K−1 · mol−1
- ^ ΔfH°, -2371.9 kJ · mol−1
- ^ ΔfH°, -2331.62 kJ · mol−1
- ^ ΔfH°, 2519.69 kJ · mol−1
- ^ ΔfH°, -220.75 kJ · mol−1
- ^ ΔfG°, -228.1 kJ · mol−1
- ^ S°, -73.6 J · K−1 · mol−1
- ^ Cp°, 50. J · K−1 · mol−1
- ^ ΔfH°, -104.6 kJ · mol−1
- ^ ΔfG°, -32.2 kJ · mol−1
- ^ S°, 123.0 J · K−1 · mol−1
- ^ Cp°, -97.5 J · K−1 · mol−1
- ^ ΔfH°, 967.8 kJ · mol−1