25NaHSO4 + 16e− → Na2S + 23NaSO4− + HS− + 8H3O+
Last updated:
- Reduction of sodium hydrogensulfate
- 25NaHSO4Sodium hydrogensulfate + 16e−ElectronNa2SSodium sulfide + 23NaSO4−Sodium sulfate ion + HS−Hydrogensulfide ion + 8H3O+Hydronium ion⟶
Reduction of sodium hydrogensulfate yields sodium sulfide, sodium sulfate ion, hydrogensulfide ion, and hydronium 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 sodium hydrogensulfate
- 25NaHSO4Sodium hydrogensulfate + 16e−ElectronNa2SSodium sulfide + 23NaSO4−Sodium sulfate ion + HS−Hydrogensulfide ion + 8H3O+Hydronium ion⟶
General equation
- Reduction of reducible species
- ReactantOxidizing agent + e− ⟶ ProductReduction product
Oxidation state of each atom
- Reduction of sodium hydrogensulfate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NaHSO4 | Sodium hydrogensulfate | 25 | Oxidizing | – |
| e− | Electron | 16 | – | Electron |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Na2S | Sodium sulfide | 1 | Reduced | – |
| NaSO4− | Sodium sulfate ion | 23 | – | – |
| HS− | Hydrogensulfide ion | 1 | Reduced | – |
| H3O+ | Hydronium ion | 8 | – | – |
Thermodynamic changes
Changes in standard condition
- Reduction of sodium hydrogensulfate◆
ΔrG −122.1 kJ/mol K 2.46 × 1021 pK −21.39
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | −893.1 | −122.1 | −1542.2 | – |
per 1 mol of | −35.72 | −4.884 | −61.688 | – |
per 1 mol of Electron | −55.82 | −7.631 | −96.388 | – |
per 1 mol of | −893.1 | −122.1 | −1542.2 | – |
per 1 mol of Sodium sulfate ion | −38.83 | −5.309 | −67.052 | – |
per 1 mol of Hydrogensulfide ion | −893.1 | −122.1 | −1542.2 | – |
per 1 mol of Hydronium ion | −111.6 | −15.26 | −192.78 | – |
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 |
|---|---|---|---|---|
| NaHSO4 (cr) | -1125.5[1] | -992.8[1] | 113.0[1] | – |
| NaHSO4 (ai) | -1127.46[1] | -1017.80[1] | 190.8[1] | -38[1] |
| NaHSO4 (cr) 1 hydrate | -1421.7[1] | -1231.6[1] | 155[1] | – |
| e− | – | – | – | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution
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 |
|---|---|---|---|---|
| Na2S (cr) | -364.8[1] | -349.8[1] | 83.7[1] | – |
| Na2S (ai) | -447.3[1] | -438.1[1] | 103.3[1] | – |
| Na2S (cr) 4.5 hydrate | -1725.9[1] | – | – | – |
| Na2S (cr) 5 hydrate | -1886.6[1] | – | – | – |
| Na2S (cr) 9 hydrate | -3074.0[1] | – | – | – |
| NaSO4− (ao) | -1144.70[1] | -1010.61[1] | 108.8[1] | – |
| HS− (ao) | -17.6[1] | 12.08[1] | 62.8[1] | – |
| H3O+ (ao) | -285.830[1] | -237.129[1] | 69.91[1] | 75.291[1] |
* (cr):Crystalline solid, (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°, -1125.5 kJ · mol−1
- ^ ΔfG°, -992.8 kJ · mol−1
- ^ S°, 113.0 J · K−1 · mol−1
- ^ ΔfH°, -1127.46 kJ · mol−1
- ^ ΔfG°, -1017.80 kJ · mol−1
- ^ S°, 190.8 J · K−1 · mol−1
- ^ Cp°, -38. J · K−1 · mol−1
- ^ ΔfH°, -1421.7 kJ · mol−1
- ^ ΔfG°, -1231.6 kJ · mol−1
- ^ S°, 155. J · K−1 · mol−1
- ^ ΔfH°, -364.8 kJ · mol−1
- ^ ΔfG°, -349.8 kJ · mol−1
- ^ S°, 83.7 J · K−1 · mol−1
- ^ ΔfH°, -447.3 kJ · mol−1
- ^ ΔfG°, -438.1 kJ · mol−1
- ^ S°, 103.3 J · K−1 · mol−1
- ^ ΔfH°, -1725.9 kJ · mol−1
- ^ ΔfH°, -1886.6 kJ · mol−1
- ^ ΔfH°, -3074.0 kJ · mol−1
- ^ ΔfH°, -1144.70 kJ · mol−1
- ^ ΔfG°, -1010.61 kJ · mol−1
- ^ S°, 108.8 J · K−1 · mol−1
- ^ ΔfH°, -17.6 kJ · mol−1
- ^ ΔfG°, 12.08 kJ · mol−1
- ^ S°, 62.8 J · K−1 · mol−1
- ^ ΔfH°, -285.830 kJ · mol−1
- ^ ΔfG°, -237.129 kJ · mol−1
- ^ S°, 69.91 J · K−1 · mol−1
- ^ Cp°, 75.291 J · K−1 · mol−1