2K2[Sn(OH)6] + 6e− → 4KOH + 2[Sn(OH)3]− + 2O2− + H2↑
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- Reduction of potassium hexahydroxidostannate(IV)
- 2K2[Sn(OH)6]Potassium hexahydroxidostannate(IV) + 6e−Electron4KOHPotassium hydroxide + 2[Sn(OH)3]−Trihydroxidostannate(II) ion + 2O2−Oxide ion + ↑⟶
Reduction of potassium hexahydroxidostannate(IV) yields potassium hydroxide, trihydroxidostannate(II) 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)
- 2K2[Sn(OH)6]Potassium hexahydroxidostannate(IV) + 6e−Electron4KOHPotassium hydroxide + 2[Sn(OH)3]−Trihydroxidostannate(II) ion + 2O2−Oxide ion + ↑⟶
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) | 2 | Oxidizing | – |
e− | Electron | 6 | – | Electron |
Products
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
KOH | Potassium hydroxide | 4 | – | – |
[Sn(OH)3]− | Trihydroxidostannate(II) ion | 2 | Reduced | – |
O2− | Oxide ion | 2 | – | – |
1 | 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 |
---|---|---|---|---|
KOH (cr) | -424.764[1] | -379.08[1] | 78.9[1] | 64.9[1] |
KOH (g) | -231.0[1] | -232.6[1] | 238.3[1] | 49.20[1] |
KOH (ai) | -482.37[1] | -440.50[1] | 91.6[1] | -126.8[1] |
KOH (cr) 1 hydrate | -748.9[1] | -645.1[1] | 117.2[1] | – |
KOH (cr) 2 hydrate | -1051.0[1] | -887.3[1] | 150.6[1] | – |
[Sn(OH)3]− | – | – | – | – |
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, (ai):Ionized aqueous solution, (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)
- ^ ΔfH°, -424.764 kJ · mol−1
- ^ ΔfG°, -379.08 kJ · mol−1
- ^ S°, 78.9 J · K−1 · mol−1
- ^ Cp°, 64.9 J · K−1 · mol−1
- ^ ΔfH°, -231.0 kJ · mol−1
- ^ ΔfG°, -232.6 kJ · mol−1
- ^ S°, 238.3 J · K−1 · mol−1
- ^ Cp°, 49.20 J · K−1 · mol−1
- ^ ΔfH°, -482.37 kJ · mol−1
- ^ ΔfG°, -440.50 kJ · mol−1
- ^ S°, 91.6 J · K−1 · mol−1
- ^ Cp°, -126.8 J · K−1 · mol−1
- ^ ΔfH°, -748.9 kJ · mol−1
- ^ ΔfG°, -645.1 kJ · mol−1
- ^ S°, 117.2 J · K−1 · mol−1
- ^ ΔfH°, -1051.0 kJ · mol−1
- ^ ΔfG°, -887.3 kJ · mol−1
- ^ S°, 150.6 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 130.684 J · K−1 · mol−1
- ^ Cp°, 28.824 J · K−1 · mol−1
- ^ ΔfH°, -4.2 kJ · mol−1
- ^ ΔfG°, 17.6 kJ · mol−1
- ^ S°, 577 J · K−1 · mol−1