4NaCl + H2SeO3 + 4H+ ๐ฅโ 4Na+ + 2Cl2โ + Se + 3H2O
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- Reaction of sodium chloride and selenous acid under acidic condition
- 4NaClSodium chloride + H2SeO3Selenous acid + 4H+Hydrogen ion4Na+Sodium ion + 2โ + + 3H2OWater๐ฅโถ
The reaction of sodium chloride, selenous acid, and hydrogen ion yields sodium ion, , , 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 selenous acid under acidic condition
- 4NaClSodium chloride + H2SeO3Selenous acid + 4H+Hydrogen ion4Na+Sodium ion + 2โ + + 3H2OWater๐ฅโถ
General equation
- Reaction of hardly oxidizable species and oxidizing species under acidic condition
- Hardly oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent + H+Non-redox agent โถ ProductOxidation product + ProductReduction product + H2ONon-redox product
Oxidation state of each atom
- Reaction of sodium chloride and selenous acid under acidic condition
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NaCl | Sodium chloride | 4 | Reducing | Hardly oxidizable |
| H2SeO3 | Selenous acid | 1 | Oxidizing | Oxidizing under acidic condition |
| H+ | Hydrogen ion | 4 | โ | Hydrogen ion |
Products
Thermodynamic changes
Changes in standard condition (1)
- Reaction of sodium chloride and selenous acid under acidic conditionโ
ฮrG 239.67 kJ/mol K 0.10 ร 10โ41 pK 41.99
| Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
|---|---|---|---|---|
per 1 mol of Equation | 318.59 | 239.67 | 264.4 | โ |
per 1 mol of | 79.647 | 59.917 | 66.10 | โ |
per 1 mol of | 318.59 | 239.67 | 264.4 | โ |
per 1 mol of Hydrogen ion | 79.647 | 59.917 | 66.10 | โ |
per 1 mol of Sodium ion | 79.647 | 59.917 | 66.10 | โ |
| 159.29 | 119.83 | 132.2 | โ | |
| 318.59 | 239.67 | 264.4 | โ | |
per 1 mol of | 106.20 | 79.890 | 88.13 | โ |
Changes in standard condition (2)
- Reaction of sodium chloride and selenous acid under acidic conditionโ
ฮrG 253.55 kJ/mol K 0.38 ร 10โ44 pK 44.42
| Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
|---|---|---|---|---|
per 1 mol of Equation | 271.8 | 253.55 | 60 | โ |
per 1 mol of | 67.95 | 63.388 | 15 | โ |
per 1 mol of | 271.8 | 253.55 | 60 | โ |
per 1 mol of Hydrogen ion | 67.95 | 63.388 | 15 | โ |
per 1 mol of Sodium ion | 67.95 | 63.388 | 15 | โ |
| 135.9 | 126.78 | 30 | โ | |
| 271.8 | 253.55 | 60 | โ | |
per 1 mol of | 90.60 | 84.517 | 20 | โ |
Changes in standard condition (3)
- Reaction of sodium chloride and selenous acid under acidic condition
| Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
|---|---|---|---|---|
per 1 mol of Equation | 318.38 | โ | โ | โ |
per 1 mol of | 79.595 | โ | โ | โ |
per 1 mol of | 318.38 | โ | โ | โ |
per 1 mol of Hydrogen ion | 79.595 | โ | โ | โ |
per 1 mol of Sodium ion | 79.595 | โ | โ | โ |
| 159.19 | โ | โ | โ | |
| 318.38 | โ | โ | โ | |
per 1 mol of | 106.13 | โ | โ | โ |
Changes in standard condition (4)
- Reaction of sodium chloride and selenous acid under acidic condition
| Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
|---|---|---|---|---|
per 1 mol of Equation | 271.6 | โ | โ | โ |
per 1 mol of | 67.90 | โ | โ | โ |
per 1 mol of | 271.6 | โ | โ | โ |
per 1 mol of Hydrogen ion | 67.90 | โ | โ | โ |
per 1 mol of Sodium ion | 67.90 | โ | โ | โ |
| 135.8 | โ | โ | โ | |
| 271.6 | โ | โ | โ | |
per 1 mol of | 90.53 | โ | โ | โ |
Thermodynamic data of reactants
| Chemical formula | Standard enthalpy of formation ฮfHยฐ kJ ยท molโ1 | Standard Gibbs energy of formation ฮfGยฐ kJ ยท molโ1 | Standard molar entropy Sยฐ J ยท Kโ1 ยท molโ1 | Standard molar heat capacity at constant pressure Cpยฐ J ยท Kโ1 ยท molโ1 |
|---|---|---|---|---|
| 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] |
| H2SeO3 (cr) | -524.46[1] | โ | โ | โ |
| H2SeO3 (ao) | -507.48[1] | -426.14[1] | 207.9[1] | โ |
| H2SeO3 (aq) | -507.27[1] | โ | โ | โ |
| H+ (g) | 1536.202[1] | โ | โ | โ |
| H+ (ao) | 0[1] | 0[1] | 0[1] | 0[1] |
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (aq):Aqueous solution
Thermodynamic data of products
| Chemical formula | Standard enthalpy of formation ฮfHยฐ kJ ยท molโ1 | Standard Gibbs energy of formation ฮfGยฐ kJ ยท molโ1 | Standard molar entropy Sยฐ J ยท Kโ1 ยท molโ1 | Standard molar heat capacity at constant pressure Cpยฐ J ยท Kโ1 ยท molโ1 |
|---|---|---|---|---|
| Na+ (g) | 609.358[1] | โ | โ | โ |
| Na+ (ao) | -240.12[1] | -261.905[1] | 59.0[1] | 46.4[1] |
| (g) | 0[1] | 0[1] | 223.066[1] | 33.907[1] |
| (ao) | -23.4[1] | 6.94[1] | 121[1] | โ |
| (cr) hexagonal, gray | 0[1] | 0[1] | 42.442[1] | 25.363[1] |
| (cr) monoclinic, red | 6.7[1] | โ | โ | โ |
| (vit) | 5.0[1] | โ | โ | โ |
| (g) | 227.07[1] | 187.03[1] | 176.72[1] | 20.820[1] |
| H2O (cr) | โ | โ | โ | โ |
| 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] |
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (vit):Vitreous liquid, (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)
- ^ ฮfHยฐ, -411.153 kJ ยท molโ1
- ^ ฮfGยฐ, -384.138 kJ ยท molโ1
- ^ Sยฐ, 72.13 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 50.50 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, -176.65 kJ ยท molโ1
- ^ ฮfGยฐ, -196.66 kJ ยท molโ1
- ^ Sยฐ, 229.81 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 35.77 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, -407.27 kJ ยท molโ1
- ^ ฮfGยฐ, -393.133 kJ ยท molโ1
- ^ Sยฐ, 115.5 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, -90.0 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, -524.46 kJ ยท molโ1
- ^ ฮfHยฐ, -507.48 kJ ยท molโ1
- ^ ฮfGยฐ, -426.14 kJ ยท molโ1
- ^ Sยฐ, 207.9 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, -507.27 kJ ยท molโ1
- ^ ฮfHยฐ, 1536.202 kJ ยท molโ1
- ^ ฮfHยฐ, 0 kJ ยท molโ1
- ^ ฮfGยฐ, 0 kJ ยท molโ1
- ^ Sยฐ, 0 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 0 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, 609.358 kJ ยท molโ1
- ^ ฮfHยฐ, -240.12 kJ ยท molโ1
- ^ ฮfGยฐ, -261.905 kJ ยท molโ1
- ^ Sยฐ, 59.0 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 46.4 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, 0 kJ ยท molโ1
- ^ ฮfGยฐ, 0 kJ ยท molโ1
- ^ Sยฐ, 223.066 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 33.907 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, -23.4 kJ ยท molโ1
- ^ ฮfGยฐ, 6.94 kJ ยท molโ1
- ^ Sยฐ, 121. J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, 0 kJ ยท molโ1
- ^ ฮfGยฐ, 0 kJ ยท molโ1
- ^ Sยฐ, 42.442 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 25.363 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, 6.7 kJ ยท molโ1
- ^ ฮfHยฐ, 5.0 kJ ยท molโ1
- ^ ฮfHยฐ, 227.07 kJ ยท molโ1
- ^ ฮfGยฐ, 187.03 kJ ยท molโ1
- ^ Sยฐ, 176.72 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 20.820 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, -285.830 kJ ยท molโ1
- ^ ฮfGยฐ, -237.129 kJ ยท molโ1
- ^ Sยฐ, 69.91 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 75.291 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, -241.818 kJ ยท molโ1
- ^ ฮfGยฐ, -228.572 kJ ยท molโ1
- ^ Sยฐ, 188.825 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 33.577 J ยท Kโ1 ยท molโ1