5KI + 2Al(NO3)3 + 6H+ → 5KIO3 + 3N2↑ + 2Al3+ + 3H2O
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- Reaction of potassium iodide and aluminium nitrate under acidic condition
- 5KIPotassium iodide + 2Al(NO3)3Aluminium nitrate + 6H+Hydrogen ion5KIO3Potassium iodate + 3↑ + 2Al3+Aluminium ion + 3H2OWater⟶
The reaction of potassium iodide, aluminium nitrate, and hydrogen ion yields potassium iodate, , aluminium 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 potassium iodide and aluminium nitrate under acidic condition
- 5KIPotassium iodide + 2Al(NO3)3Aluminium nitrate + 6H+Hydrogen ion5KIO3Potassium iodate + 3↑ + 2Al3+Aluminium ion + 3H2OWater⟶
General equation
- Reaction of oxidizable species and oxidizing species under acidic condition
- Oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent + H+Non-redox agent ⟶ ProductOxidation product + ProductReduction product + H2ONon-redox product
Oxidation state of each atom
- Reaction of potassium iodide and aluminium nitrate under acidic condition
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| KI | Potassium iodide | 5 | Reducing | Oxidizable |
| Al(NO3)3 | Aluminium nitrate | 2 | Oxidizing | Oxidizing under acidic condition |
| H+ | Hydrogen ion | 6 | – | Hydrogen ion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| KIO3 | Potassium iodate | 5 | Oxidized | – |
| 3 | Reduced | – | ||
| Al3+ | Aluminium ion | 2 | – | – |
| H2O | Water | 3 | – | Water |
Thermodynamic changes
Changes in standard condition
- Reaction of potassium iodide and aluminium nitrate under acidic condition◆
ΔrG −423 kJ/mol K 1.28 × 1074 pK −74.11
| 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 | −440 | −423 | −58.5 | – |
per 1 mol of | −88.0 | −84.6 | −11.7 | – |
per 1 mol of | −220 | −212 | −29.3 | – |
per 1 mol of Hydrogen ion | −73.3 | −70.5 | −9.75 | – |
per 1 mol of | −88.0 | −84.6 | −11.7 | – |
| −147 | −141 | −19.5 | – | |
per 1 mol of Aluminium ion | −220 | −212 | −29.3 | – |
per 1 mol of | −147 | −141 | −19.5 | – |
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 |
|---|---|---|---|---|
| KI (cr) | -327.900[1] | -324.892[1] | 106.32[1] | 52.93[1] |
| KI (g) | -125.5[1] | -166.1[1] | 258.3[1] | 37.11[1] |
| KI (ai) | -307.57[1] | -334.85[1] | 213.8[1] | -120.5[1] |
| Al(NO3)3 (ai) | -1155[1] | -820[1] | 117.6[1] | – |
| Al(NO3)3 (cr) 6 hydrate | -2850.48[1] | -2203.39[1] | 467.8[1] | 433.0[1] |
| Al(NO3)3 (cr) 9 hydrate | -3757.06[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 |
|---|---|---|---|---|
| KIO3 (cr) | -501.37[1] | -418.35[1] | 151.46[1] | 106.48[1] |
| KIO3 (ai) | -473.6[1] | -411.2[1] | 220.9[1] | – |
| (g) | 0[1] | 0[1] | 191.61[1] | 29.125[1] |
| Al3+ (g) | 5483.17[1] | – | – | – |
| Al3+ (ao) | -531[1] | -485[1] | -321.7[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°, -327.900 kJ · mol−1
- ^ ΔfG°, -324.892 kJ · mol−1
- ^ S°, 106.32 J · K−1 · mol−1
- ^ Cp°, 52.93 J · K−1 · mol−1
- ^ ΔfH°, -125.5 kJ · mol−1
- ^ ΔfG°, -166.1 kJ · mol−1
- ^ S°, 258.3 J · K−1 · mol−1
- ^ Cp°, 37.11 J · K−1 · mol−1
- ^ ΔfH°, -307.57 kJ · mol−1
- ^ ΔfG°, -334.85 kJ · mol−1
- ^ S°, 213.8 J · K−1 · mol−1
- ^ Cp°, -120.5 J · K−1 · mol−1
- ^ ΔfH°, -1155. kJ · mol−1
- ^ ΔfG°, -820. kJ · mol−1
- ^ S°, 117.6 J · K−1 · mol−1
- ^ ΔfH°, -2850.48 kJ · mol−1
- ^ ΔfG°, -2203.39 kJ · mol−1
- ^ S°, 467.8 J · K−1 · mol−1
- ^ Cp°, 433.0 J · K−1 · mol−1
- ^ ΔfH°, -3757.06 kJ · 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°, -501.37 kJ · mol−1
- ^ ΔfG°, -418.35 kJ · mol−1
- ^ S°, 151.46 J · K−1 · mol−1
- ^ Cp°, 106.48 J · K−1 · mol−1
- ^ ΔfH°, -473.6 kJ · mol−1
- ^ ΔfG°, -411.2 kJ · mol−1
- ^ S°, 220.9 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 191.61 J · K−1 · mol−1
- ^ Cp°, 29.125 J · K−1 · mol−1
- ^ ΔfH°, 5483.17 kJ · mol−1
- ^ ΔfH°, -531. kJ · mol−1
- ^ ΔfG°, -485. kJ · mol−1
- ^ S°, -321.7 J · K−1 · 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