6NaCl + 2CaSeO4 + 2H+ → 2Na2SeO3 + 2Na+ + Cl2O↑ + 2CaCl2 + H2O
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- Reaction of sodium chloride and calcium selenate under acidic condition
- 6NaClSodium chloride + 2CaSeO4Calcium selenate + 2H+Hydrogen ion2Na2SeO3Sodium selenite + 2Na+Sodium ion + Cl2O↑Dichlorine monoxide + 2CaCl2Calcium chloride + H2OWater⟶
The reaction of sodium chloride, calcium selenate, and hydrogen ion yields sodium selenite, sodium ion, dichlorine monoxide, calcium chloride, and water (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of sodium chloride and calcium selenate under acidic condition
- 6NaClSodium chloride + 2CaSeO4Calcium selenate + 2H+Hydrogen ion2Na2SeO3Sodium selenite + 2Na+Sodium ion + Cl2O↑Dichlorine monoxide + 2CaCl2Calcium chloride + H2OWater⟶
General equation
- Reaction of hardly oxidizable species and oxidizing species under acidic condition
- Hardly oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent + H+Non-redox agent ⟶ ProductOxidation product + ProductReduction product + H2ONon-redox product
Oxidation state of each atom
- Reaction of sodium chloride and calcium selenate under acidic condition
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NaCl | Sodium chloride | 6 | Reducing | Hardly oxidizable |
| CaSeO4 | Calcium selenate | 2 | Oxidizing | Oxidizing under acidic condition |
| H+ | Hydrogen ion | 2 | – | Hydrogen ion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Na2SeO3 | Sodium selenite | 2 | Reduced | – |
| Na+ | Sodium ion | 2 | – | – |
| Cl2O | Dichlorine monoxide | 1 | Oxidized | – |
| CaCl2 | Calcium chloride | 2 | – | – |
| H2O | Water | 1 | – | Water |
Thermodynamic changes
Changes in standard condition
- Reaction of sodium chloride and calcium selenate under acidic condition
| 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 | 244.2 | – | – | – |
per 1 mol of | 40.70 | – | – | – |
per 1 mol of | 122.1 | – | – | – |
per 1 mol of Hydrogen ion | 122.1 | – | – | – |
per 1 mol of | 122.1 | – | – | – |
per 1 mol of Sodium ion | 122.1 | – | – | – |
per 1 mol of | 244.2 | – | – | – |
per 1 mol of | 122.1 | – | – | – |
per 1 mol of | 244.2 | – | – | – |
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 |
|---|---|---|---|---|
| NaCl (cr) | -411.153[1] | -384.138[1] | 72.13[1] | 50.50[1] |
| NaCl (g) | -176.65[1] | -196.66[1] | 229.81[1] | 35.77[1] |
| NaCl (ai) | -407.27[1] | -393.133[1] | 115.5[1] | -90.0[1] |
| CaSeO4 (cr) | -1109.81[1] | – | – | – |
| CaSeO4 (cr) 2 hydrate | -1706.7[1] | -1486.8[1] | 222[1] | – |
| H+ (g) | 1536.202[1] | – | – | – |
| H+ (ao) | 0[1] | 0[1] | 0[1] | 0[1] |
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-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 |
|---|---|---|---|---|
| Na2SeO3 (cr) | -958.6[1] | – | – | – |
| Na2SeO3 (ai) | -989.5[1] | -893.7[1] | 130[1] | – |
| Na2SeO3 (cr) 5 hydrate | -2404.13[1] | – | – | – |
| Na+ (g) | 609.358[1] | – | – | – |
| Na+ (ao) | -240.12[1] | -261.905[1] | 59.0[1] | 46.4[1] |
| Cl2O (g) | 80.3[1] | 97.9[1] | 266.21[1] | 45.40[1] |
| CaCl2 (cr) | -795.8[1] | -748.1[1] | 104.6[1] | 72.59[1] |
| CaCl2 (g) | -471.5[1] | -479.24[1] | 290.27[1] | 59.33[1] |
| CaCl2 (ai) | -877.13[1] | -816.01[1] | 59.8[1] | – |
| CaCl2 (cr) 1 hydrate | -1109.2[1] | – | – | – |
| CaCl2 (cr) 2 hydrate | -1402.9[1] | – | – | – |
| CaCl2 (cr) 4 hydrate | -2009.6[1] | – | – | – |
| CaCl2 (cr) 6 hydrate | -2607.9[1] | – | – | – |
| H2O (cr) | – | – | – | – |
| H2O (l) | -285.830[1] | -237.129[1] | 69.91[1] | 75.291[1] |
| H2O (g) | -241.818[1] | -228.572[1] | 188.825[1] | 33.577[1] |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas, (ao):Un-ionized aqueous solution, (l):Liquid
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°, -411.153 kJ · mol−1
- ^ ΔfG°, -384.138 kJ · mol−1
- ^ S°, 72.13 J · K−1 · mol−1
- ^ Cp°, 50.50 J · K−1 · mol−1
- ^ ΔfH°, -176.65 kJ · mol−1
- ^ ΔfG°, -196.66 kJ · mol−1
- ^ S°, 229.81 J · K−1 · mol−1
- ^ Cp°, 35.77 J · K−1 · mol−1
- ^ ΔfH°, -407.27 kJ · mol−1
- ^ ΔfG°, -393.133 kJ · mol−1
- ^ S°, 115.5 J · K−1 · mol−1
- ^ Cp°, -90.0 J · K−1 · mol−1
- ^ ΔfH°, -1109.81 kJ · mol−1
- ^ ΔfH°, -1706.7 kJ · mol−1
- ^ ΔfG°, -1486.8 kJ · mol−1
- ^ S°, 222. J · K−1 · mol−1
- ^ ΔfH°, 1536.202 kJ · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 0 J · K−1 · mol−1
- ^ Cp°, 0 J · K−1 · mol−1
- ^ ΔfH°, -958.6 kJ · mol−1
- ^ ΔfH°, -989.5 kJ · mol−1
- ^ ΔfG°, -893.7 kJ · mol−1
- ^ S°, 130. J · K−1 · mol−1
- ^ ΔfH°, -2404.13 kJ · mol−1
- ^ ΔfH°, 609.358 kJ · mol−1
- ^ ΔfH°, -240.12 kJ · mol−1
- ^ ΔfG°, -261.905 kJ · mol−1
- ^ S°, 59.0 J · K−1 · mol−1
- ^ Cp°, 46.4 J · K−1 · mol−1
- ^ ΔfH°, 80.3 kJ · mol−1
- ^ ΔfG°, 97.9 kJ · mol−1
- ^ S°, 266.21 J · K−1 · mol−1
- ^ Cp°, 45.40 J · K−1 · mol−1
- ^ ΔfH°, -795.8 kJ · mol−1
- ^ ΔfG°, -748.1 kJ · mol−1
- ^ S°, 104.6 J · K−1 · mol−1
- ^ Cp°, 72.59 J · K−1 · mol−1
- ^ ΔfH°, -471.5 kJ · mol−1
- ^ ΔfG°, -479.24 kJ · mol−1
- ^ S°, 290.27 J · K−1 · mol−1
- ^ Cp°, 59.33 J · K−1 · mol−1
- ^ ΔfH°, -877.13 kJ · mol−1
- ^ ΔfG°, -816.01 kJ · mol−1
- ^ S°, 59.8 J · K−1 · mol−1
- ^ ΔfH°, -1109.2 kJ · mol−1
- ^ ΔfH°, -1402.9 kJ · mol−1
- ^ ΔfH°, -2009.6 kJ · mol−1
- ^ ΔfH°, -2607.9 kJ · 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
- ^ ΔfH°, -241.818 kJ · mol−1
- ^ ΔfG°, -228.572 kJ · mol−1
- ^ S°, 188.825 J · K−1 · mol−1
- ^ Cp°, 33.577 J · K−1 · mol−1