6[FeNCS]2+ + 10e− → 4Fe2+ + Fe[Fe(CN)6] + 3S22−
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- Reduction of iron(III) thiocyanato-κN ion
- 6[FeNCS]2+Iron(III) thiocyanato-κN ion + 10e−Electron4Fe2+Iron(II) ion + Fe[Fe(CN)6]Iron(III) hexacyanidoferrate(III) + 3S22−Disulfide ion⟶
Reduction of iron(III) thiocyanato-κN ion yields iron(II) ion, iron(III) hexacyanidoferrate(III), and disulfide 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 iron(III) thiocyanato-κN ion
- 6[FeNCS]2+Iron(III) thiocyanato-κN ion + 10e−Electron4Fe2+Iron(II) ion + Fe[Fe(CN)6]Iron(III) hexacyanidoferrate(III) + 3S22−Disulfide ion⟶
General equation
- Reduction of reducible species
- ReactantOxidizing agent + e− ⟶ ProductReduction product
Oxidation state of each atom
- Reduction of iron(III) thiocyanato-κN ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| [FeNCS]2+ | Iron(III) thiocyanato-κN ion | 6 | Oxidizing | – |
| e− | Electron | 10 | – | Electron |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Fe2+ | Iron(II) ion | 4 | Reduced | – |
| Fe[Fe(CN)6] | Iron(III) hexacyanidoferrate(III) | 1 | Reduced | – |
| S22− | Disulfide ion | 3 | – | – |
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 |
|---|---|---|---|---|
| [FeNCS]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 |
|---|---|---|---|---|
| Fe2+ (g) | 2749.93[1] | – | – | – |
| Fe2+ (ao) | -89.1[1] | -78.90[1] | -137.7[1] | – |
| Fe[Fe(CN)6] | – | – | – | – |
| S22− (ao) | 30.1[1] | 79.5[1] | 28.5[1] | – |
* (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)