7NaCl + 5HClO2 + 7H+ ๐ฅโ 7Na+ + 4Cl2Oโ + 2Cl2โ + 6H2O
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- Reaction of sodium chloride and chlorous acid under acidic condition
- 7NaClSodium chloride + 5HClO2Chlorous acid + 7H+Hydrogen ion7Na+Sodium ion + 4Cl2OโDichlorine monoxide + 2โ + 6H2OWater๐ฅโถ
The reaction of sodium chloride, chlorous acid, and hydrogen ion yields sodium ion, dichlorine monoxide, , 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 chlorous acid under acidic condition
- 7NaClSodium chloride + 5HClO2Chlorous acid + 7H+Hydrogen ion7Na+Sodium ion + 4Cl2OโDichlorine monoxide + 2โ + 6H2OWater๐ฅโถ
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 chlorous acid under acidic condition
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NaCl | Sodium chloride | 7 | Reducing | Hardly oxidizable |
| HClO2 | Chlorous acid | 5 | Oxidizing | Oxidizing under acidic condition |
| H+ | Hydrogen ion | 7 | โ | Hydrogen ion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Na+ | Sodium ion | 7 | โ | โ |
| Cl2O | Dichlorine monoxide | 4 | Redoxed product | โ |
| 2 | Oxidized | โ | ||
| H2O | Water | 6 | โ | Water |
Thermodynamic changes
Changes in standard condition (1)
- Reaction of sodium chloride and chlorous acid under acidic conditionโ
ฮrG โ142.1 kJ/mol K 7.85 ร 1024 pK โ24.89
| 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 | 35.8 | โ142.1 | 593.4 | โ |
per 1 mol of | 5.11 | โ20.30 | 84.77 | โ |
per 1 mol of | 7.16 | โ28.42 | 118.7 | โ |
per 1 mol of Hydrogen ion | 5.11 | โ20.30 | 84.77 | โ |
per 1 mol of Sodium ion | 5.11 | โ20.30 | 84.77 | โ |
per 1 mol of | 8.95 | โ35.52 | 148.3 | โ |
| 17.9 | โ71.05 | 296.7 | โ | |
per 1 mol of | 5.97 | โ23.68 | 98.90 | โ |
Changes in standard condition (2)
- Reaction of sodium chloride and chlorous acid under acidic conditionโ
ฮrG โ128.2 kJ/mol K 2.88 ร 1022 pK โ22.46
| 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 | โ11.0 | โ128.2 | 389 | โ |
per 1 mol of | โ1.57 | โ18.31 | 55.6 | โ |
per 1 mol of | โ2.20 | โ25.64 | 77.8 | โ |
per 1 mol of Hydrogen ion | โ1.57 | โ18.31 | 55.6 | โ |
per 1 mol of Sodium ion | โ1.57 | โ18.31 | 55.6 | โ |
per 1 mol of | โ2.75 | โ32.05 | 97.3 | โ |
| โ5.50 | โ64.10 | 195 | โ | |
per 1 mol of | โ1.83 | โ21.37 | 64.8 | 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] |
| HClO2 (ao) | -51.9[1] | 5.9[1] | 188.3[1] | 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
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] |
| Cl2O (g) | 80.3[1] | 97.9[1] | 266.21[1] | 45.40[1] |
| (g) | 0[1] | 0[1] | 223.066[1] | 33.907[1] |
| (ao) | -23.4[1] | 6.94[1] | 121[1] | โ |
| 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, (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, -51.9 kJ ยท molโ1
- ^ ฮfGยฐ, 5.9 kJ ยท molโ1
- ^ Sยฐ, 188.3 J ยท Kโ1 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, 80.3 kJ ยท molโ1
- ^ ฮfGยฐ, 97.9 kJ ยท molโ1
- ^ Sยฐ, 266.21 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 45.40 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, -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