3K2[Sn(OH)6] + 6e− → K2SnO3 + 2K2O + 2[Sn(OH)6]2− + O2− + 3H2↑
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- Reduction of potassium hexahydroxidostannate(IV)
- 3K2[Sn(OH)6]Potassium hexahydroxidostannate(IV) + 6e−ElectronK2SnO3Potassium metastannate + 2K2OPotassium oxide + 2[Sn(OH)6]2−Hexahydroxidostannate(IV) ion + O2−Oxide ion + 3↑⟶
Reduction of potassium hexahydroxidostannate(IV) yields potassium metastannate, potassium oxide, hexahydroxidostannate(IV) ion, oxide ion, and (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 potassium hexahydroxidostannate(IV)
- 3K2[Sn(OH)6]Potassium hexahydroxidostannate(IV) + 6e−ElectronK2SnO3Potassium metastannate + 2K2OPotassium oxide + 2[Sn(OH)6]2−Hexahydroxidostannate(IV) ion + O2−Oxide ion + 3↑⟶
General equation
- Reduction of reducible species
- ReactantOxidizing agent + e− ⟶ ProductReduction product
Oxidation state of each atom
- Reduction of potassium hexahydroxidostannate(IV)
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| K2[Sn(OH)6] | Potassium hexahydroxidostannate(IV) | 3 | Oxidizing | – |
| e− | Electron | 6 | – | Electron |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| K2SnO3 | Potassium metastannate | 1 | – | – |
| K2O | Potassium oxide | 2 | – | – |
| [Sn(OH)6]2− | Hexahydroxidostannate(IV) ion | 2 | – | – |
| O2− | Oxide ion | 1 | – | – |
| 3 | Reduced | – |
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 |
|---|---|---|---|---|
| K2[Sn(OH)6] | – | – | – | – |
| 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 |
|---|---|---|---|---|
| K2SnO3 | – | – | – | – |
| K2O (cr) | -361.5[1] | -322.1[2] | 94.1[2] | 83.7[2] |
| K2O (g) | -63[1] | – | – | – |
| [Sn(OH)6]2− | – | – | – | – |
| O2− | – | – | – | – |
| (g) | 0[1] | 0[1] | 130.684[1] | 28.824[1] |
| (ao) | -4.2[1] | 17.6[1] | 577[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)
- 2James G. Speight (2017)Lange's Handbook of Chemistry, 17th editionMcGraw Hill Education
- ^ ΔfG°, -322.1 kJ · mol−1 - p.280
- ^ S°, 94.1 J · K−1 · mol−1 - p.280
- ^ Cp°, 83.7 J · K−1 · mol−1 - p.280