6NaClO + 4Al(OH)3 🔥→ 3NaClO2 + 3Na[Al(OH)4] + AlCl3
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The reaction of sodium hypochlorite and aluminium hydroxide yields sodium chlorite, sodium tetrahydroxydoaluminate, and aluminium chloride (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 hypochlorite and aluminium hydroxide
General equation
- Reaction of self redoxing species and base
- Self-redoxing speciesSelf redox agent + BaseNon-redox agent ⟶ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Reaction of sodium hypochlorite and aluminium hydroxide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NaClO | Sodium hypochlorite | 6 | – | Self redoxing |
| Al(OH)3 | Aluminium hydroxide | 4 | – | Base |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NaClO2 | Sodium chlorite | 3 | Oxidized | – |
| Na[Al(OH)4] | Sodium tetrahydroxydoaluminate | 3 | – | – |
| AlCl3 | Aluminium chloride | 1 | Reduced | – |
Thermodynamic changes
Changes in standard condition
- Reaction of sodium hypochlorite and aluminium hydroxide◆
ΔrG 701 kJ/mol K 0.15 × 10−122 pK 122.81 - 6NaClOIonized aqueous solution + 4Al(OH)3Crystalline solid3NaClO2Ionized aqueous solution + 3Na[Al(OH)4]Ionized aqueous solution + AlCl3Ionized aqueous solution🔥⟶
| 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 | 39 | 701 | −70 | – |
per 1 mol of | 6.5 | 117 | −12 | – |
per 1 mol of | 9.8 | 175 | −18 | – |
per 1 mol of | 13 | 234 | −23 | – |
per 1 mol of | 13 | 234 | −23 | – |
per 1 mol of | 39 | 701 | −70 | – |
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 |
|---|---|---|---|---|
| NaClO (ai) | -347.3[1] | -298.7[1] | 100[1] | – |
| Al(OH)3 (cr) | -1284[2] | -1306[2] | 71[2] | 93.1[2] |
| Al(OH)3 (am) | -1276[1] | – | – | – |
* (ai):Ionized aqueous solution, (cr):Crystalline solid, (am):Amorphous solid
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 |
|---|---|---|---|---|
| NaClO2 (cr) | -307.02[1] | – | – | – |
| NaClO2 (ai) | -306.7[1] | -244.7[1] | 160.2[1] | – |
| NaClO2 (cr) 3 hydrate | -1192.77[1] | – | – | – |
| Na[Al(OH)4] (ai) | -1742.6[1] | -1567.2[1] | 161.9[1] | – |
| AlCl3 (cr) | -704.2[1] | -628.8[1] | 110.67[1] | 91.84[1] |
| AlCl3 (g) | -583.2[1] | – | – | – |
| AlCl3 (ai) | -1033[1] | -879[1] | -152.3[1] | – |
| AlCl3 (cr) 6 hydrate | -2691.6[1] | -2261.1[1] | 318.0[1] | 296.2[1] |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas
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°, -347.3 kJ · mol−1
- ^ ΔfG°, -298.7 kJ · mol−1
- ^ S°, 100. J · K−1 · mol−1
- ^ ΔfH°, -1276. kJ · mol−1
- ^ ΔfH°, -307.02 kJ · mol−1
- ^ ΔfH°, -306.7 kJ · mol−1
- ^ ΔfG°, -244.7 kJ · mol−1
- ^ S°, 160.2 J · K−1 · mol−1
- ^ ΔfH°, -1192.77 kJ · mol−1
- ^ ΔfH°, -1742.6 kJ · mol−1
- ^ ΔfG°, -1567.2 kJ · mol−1
- ^ S°, 161.9 J · K−1 · mol−1
- ^ ΔfH°, -704.2 kJ · mol−1
- ^ ΔfG°, -628.8 kJ · mol−1
- ^ S°, 110.67 J · K−1 · mol−1
- ^ Cp°, 91.84 J · K−1 · mol−1
- ^ ΔfH°, -583.2 kJ · mol−1
- ^ ΔfH°, -1033. kJ · mol−1
- ^ ΔfG°, -879. kJ · mol−1
- ^ S°, -152.3 J · K−1 · mol−1
- ^ ΔfH°, -2691.6 kJ · mol−1
- ^ ΔfG°, -2261.1 kJ · mol−1
- ^ S°, 318.0 J · K−1 · mol−1
- ^ Cp°, 296.2 J · K−1 · mol−1
- 2James G. Speight (2017)Lange's Handbook of Chemistry, 17th editionMcGraw Hill Education
- ^ ΔfH°, -1284 kJ · mol−1 - p.254
- ^ ΔfG°, -1306 kJ · mol−1 - p.254
- ^ S°, 71 J · K−1 · mol−1 - p.254
- ^ Cp°, 93.1 J · K−1 · mol−1 - p.254