Ca(MnO4)2 + 10e− → Ca2+ + 2MnO + 6O2−
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- Reduction of calcium permanganate
- Ca(MnO4)2Calcium permanganate + 10e−ElectronCa2+Calcium ion + 2MnOManganese(II) oxide + 6O2−Oxide ion⟶
Reduction of calcium permanganate yields calcium ion, manganese(II) oxide, 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 calcium permanganate
- Ca(MnO4)2Calcium permanganate + 10e−ElectronCa2+Calcium ion + 2MnOManganese(II) oxide + 6O2−Oxide ion⟶
General equation
- Reduction of reducible species
- ReactantOxidizing agent + e− ⟶ ProductReduction product
Oxidation state of each atom
- Reduction of calcium permanganate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Ca(MnO4)2 | Calcium permanganate | 1 | Oxidizing | – |
| e− | Electron | 10 | – | Electron |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Ca2+ | Calcium ion | 1 | – | – |
| MnO | Manganese(II) oxide | 2 | Reduced | – |
| O2− | Oxide ion | 6 | – | – |
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 |
|---|---|---|---|---|
| Ca(MnO4)2 | – | – | – | – |
| 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 |
|---|---|---|---|---|
| Ca2+ (g) | 1925.90[1] | – | – | – |
| Ca2+ (ao) | -542.83[1] | -553.58[1] | -53.1[1] | – |
| MnO (cr) | -385.22[1] | -362.90[1] | 59.71[1] | 45.44[1] |
| MnO (g) | 124.22[1] | – | – | – |
| O2− | – | – | – | – |
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline 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)