6[FeNCS]2+ + 24e− → 4Fe + Fe[Fe(CN)6] + 6S2−
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- Reduction of iron(III) thiocyanato-κN ion
- 6[FeNCS]2+Iron(III) thiocyanato-κN ion + 24e−Electron4 + Fe[Fe(CN)6]Iron(III) hexacyanidoferrate(III) + 6S2−Sulfide ion⟶
Reduction of iron(III) thiocyanato-κN ion yields , iron(III) hexacyanidoferrate(III), and sulfide 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 + 24e−Electron4 + Fe[Fe(CN)6]Iron(III) hexacyanidoferrate(III) + 6S2−Sulfide 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 | 24 | – | Electron |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| 4 | Reduced | – | ||
| Fe[Fe(CN)6] | Iron(III) hexacyanidoferrate(III) | 1 | Reduced | – |
| S2− | Sulfide 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 |
|---|---|---|---|---|
| [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 |
|---|---|---|---|---|
| (cr) | 0[1] | 0[1] | 27.28[1] | 25.10[1] |
| (g) | 416.3[1] | 370.7[1] | 180.490[1] | 25.677[1] |
| Fe[Fe(CN)6] | – | – | – | – |
| S2− (ao) | 33.1[1] | 85.8[1] | -14.6[1] | – |
* (cr):Crystalline solid, (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)