MnO42− → MnO4− + e−
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- Oxidation of manganate ion
- MnO42−Manganate ionMnO4−Permanganate ion + e−Electron⟶
Oxidation of manganate ion yields permanganate ion. This reaction is an oxidation-reduction reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Oxidation of manganate ion
- MnO42−Manganate ionMnO4−Permanganate ion + e−Electron⟶
General equation
- Oxidation of oxidizable species
- ReactantReducing agent ⟶ ProductOxidation product + e−
Oxidation state of each atom
- Oxidation of manganate ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| MnO42− | Manganate ion | 1 | Reducing | – |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| MnO4− | Permanganate ion | 1 | Oxidized | – |
| e− | Electron | 1 | – | Electron |
Thermodynamic changes
Changes in standard condition
- Oxidation of manganate ion◆
ΔrG 53.5 kJ/mol K 0.42 × 10−9 pK 9.37 - MnO42−Un-ionized aqueous solutionMnO4−Un-ionized aqueous solution + e−⟶
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | 112 | 53.5 | 132 | – |
per 1 mol of Manganate ion | 112 | 53.5 | 132 | – |
per 1 mol of Permanganate ion | 112 | 53.5 | 132 | – |
per 1 mol of Electron | 112 | 53.5 | 132 | – |
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 |
|---|---|---|---|---|
| MnO42− (ao) | -653[1] | -500.7[1] | 59[1] | – |
* (ao):Un-ionized aqueous solution
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 |
|---|---|---|---|---|
| MnO4− (ao) | -541.4[1] | -447.2[1] | 191.2[1] | -82.0[1] |
| e− | – | – | – | – |
* (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)