6NaCl + 6KBrO3 🔥→ NaBr + 5NaBrO3 + 3Cl2↑ + 3K2O
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- Reaction of sodium chloride and potassium bromate
The reaction of sodium chloride and potassium bromate yields sodium bromide, sodium bromate, , and potassium oxide (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 potassium bromate
General equation
- Reaction of hardly oxidizable species and oxidizing species
- Hardly oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent ⟶ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Reaction of sodium chloride and potassium bromate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NaCl | Sodium chloride | 6 | Reducing | Hardly oxidizable |
| KBrO3 | Potassium bromate | 6 | Oxidizing | Oxidizing |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NaBr | Sodium bromide | 1 | Reduced | – |
| NaBrO3 | Sodium bromate | 5 | – | – |
| 3 | Oxidized | – | ||
| K2O | Potassium oxide | 3 | – | – |
Thermodynamic changes
Changes in standard condition
- Reaction of sodium chloride and potassium bromate◆
ΔrG 1403.4 kJ/mol K 0.14 × 10−245 pK 245.87
| 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 | 1512.3 | 1403.4 | 355.1 | – |
per 1 mol of | 252.05 | 233.90 | 59.18 | – |
per 1 mol of | 252.05 | 233.90 | 59.18 | – |
per 1 mol of | 1512.3 | 1403.4 | 355.1 | – |
per 1 mol of | 302.46 | 280.68 | 71.02 | – |
| 504.10 | 467.80 | 118.4 | – | |
per 1 mol of | 504.10 | 467.80 | 118.4 | – |
Changes in aqueous solution (1)
- Reaction of sodium chloride and potassium bromate◆
ΔrG 1398.2 kJ/mol K 0.11 × 10−244 pK 244.95
| 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 | 1378.2 | 1398.2 | −80.9 | – |
per 1 mol of | 229.70 | 233.03 | −13.5 | – |
per 1 mol of | 229.70 | 233.03 | −13.5 | – |
per 1 mol of | 1378.2 | 1398.2 | −80.9 | – |
per 1 mol of | 275.64 | 279.64 | −16.2 | – |
| 459.40 | 466.07 | −27.0 | – | |
per 1 mol of | 459.40 | 466.07 | −27.0 | – |
Changes in aqueous solution (2)
- Reaction of sodium chloride and potassium bromate◆
ΔrG 1419.0 kJ/mol K 0.25 × 10−248 pK 248.60
| 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 | 1308.0 | 1419.0 | −387 | – |
per 1 mol of | 218.00 | 236.50 | −64.5 | – |
per 1 mol of | 218.00 | 236.50 | −64.5 | – |
per 1 mol of | 1308.0 | 1419.0 | −387 | – |
per 1 mol of | 261.60 | 283.80 | −77.4 | – |
| 436.00 | 473.00 | −129 | – | |
per 1 mol of | 436.00 | 473.00 | −129 | – |
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] |
| KBrO3 (cr) | -360.24[1] | -271.16[1] | 149.16[1] | 105.19[1] |
| KBrO3 (ai) | -319.45[1] | -264.67[1] | 264.22[1] | – |
* (cr):Crystalline solid, (g):Gas, (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 |
|---|---|---|---|---|
| NaBr (cr) | -361.062[1] | -348.983[1] | 86.82[1] | 51.38[1] |
| NaBr (g) | -143.1[1] | -177.06[1] | 241.19[1] | 36.32[1] |
| NaBr (ai) | -361.665[1] | -365.849[1] | 141.4[1] | -95.4[1] |
| NaBr (cr) 2 hydrate | -951.94[1] | -828.29[1] | 179.1[1] | – |
| NaBrO3 (cr) | -334.09[1] | -242.62[1] | 128.9[1] | – |
| NaBrO3 (ai) | -307.19[1] | -243.29[1] | 220.9[1] | – |
| (g) | 0[1] | 0[1] | 223.066[1] | 33.907[1] |
| (ao) | -23.4[1] | 6.94[1] | 121[1] | – |
| K2O (cr) | -361.5[1] | -322.1[2] | 94.1[2] | 83.7[2] |
| K2O (g) | -63[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°, -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°, -360.24 kJ · mol−1
- ^ ΔfG°, -271.16 kJ · mol−1
- ^ S°, 149.16 J · K−1 · mol−1
- ^ Cp°, 105.19 J · K−1 · mol−1
- ^ ΔfH°, -319.45 kJ · mol−1
- ^ ΔfG°, -264.67 kJ · mol−1
- ^ S°, 264.22 J · K−1 · mol−1
- ^ ΔfH°, -361.062 kJ · mol−1
- ^ ΔfG°, -348.983 kJ · mol−1
- ^ S°, 86.82 J · K−1 · mol−1
- ^ Cp°, 51.38 J · K−1 · mol−1
- ^ ΔfH°, -143.1 kJ · mol−1
- ^ ΔfG°, -177.06 kJ · mol−1
- ^ S°, 241.19 J · K−1 · mol−1
- ^ Cp°, 36.32 J · K−1 · mol−1
- ^ ΔfH°, -361.665 kJ · mol−1
- ^ ΔfG°, -365.849 kJ · mol−1
- ^ S°, 141.4 J · K−1 · mol−1
- ^ Cp°, -95.4 J · K−1 · mol−1
- ^ ΔfH°, -951.94 kJ · mol−1
- ^ ΔfG°, -828.29 kJ · mol−1
- ^ S°, 179.1 J · K−1 · mol−1
- ^ ΔfH°, -334.09 kJ · mol−1
- ^ ΔfG°, -242.62 kJ · mol−1
- ^ S°, 128.9 J · K−1 · mol−1
- ^ ΔfH°, -307.19 kJ · mol−1
- ^ ΔfG°, -243.29 kJ · mol−1
- ^ S°, 220.9 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 223.066 J · K−1 · mol−1
- ^ Cp°, 33.907 J · K−1 · mol−1
- ^ ΔfH°, -23.4 kJ · mol−1
- ^ ΔfG°, 6.94 kJ · mol−1
- ^ S°, 121. J · K−1 · mol−1
- ^ ΔfH°, -361.5 kJ · mol−1
- ^ ΔfH°, -63. kJ · mol−1
- 2James G. Speight (2017)Lange's Handbook of Chemistry, 17th editionMcGraw Hill Education
- ^ ΔfG°, -322.1 kJ · mol−1 - p.280
- ^ S°, 94.1 J · K−1 · mol−1 - p.280
- ^ Cp°, 83.7 J · K−1 · mol−1 - p.280