6[FeNCS]2+ + 13e− → [Fe(CN)6]4− + 6S2− + 5Fe3+
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- Reduction of iron(III) thiocyanato-κN ion
- 6[FeNCS]2+Iron(III) thiocyanato-κN ion + 13e−Electron[Fe(CN)6]4−Hexacyanidoferrate(II) ion + 6S2−Sulfide ion + 5Fe3+Iron(III) ion⟶
Reduction of iron(III) thiocyanato-κN ion yields hexacyanidoferrate(II) ion, sulfide ion, and iron(III) 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 + 13e−Electron[Fe(CN)6]4−Hexacyanidoferrate(II) ion + 6S2−Sulfide ion + 5Fe3+Iron(III) 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 | 13 | – | Electron |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| [Fe(CN)6]4− | Hexacyanidoferrate(II) ion | 1 | Reduced | – |
| S2− | Sulfide ion | 6 | – | – |
| Fe3+ | Iron(III) ion | 5 | – | – |
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 |
|---|---|---|---|---|
| [Fe(CN)6]4− (ao) | 455.6[1] | 695.08[1] | 95.0[1] | – |
| S2− (ao) | 33.1[1] | 85.8[1] | -14.6[1] | – |
| Fe3+ (g) | 5712.8[1] | – | – | – |
| Fe3+ (ao) | -48.5[1] | -4.7[1] | -315.9[1] | – |
* (ao):Un-ionized aqueous solution, (g):Gas
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)