10KI + Mg3(AsO4)2 🔥→ 5K2O + 2I2 + 2AsI3 + 3MgO
Last updated:
- Reaction of potassium iodide and magnesium arsenate
The reaction of potassium iodide and magnesium arsenate yields potassium oxide, , , and magnesium 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 potassium iodide and magnesium arsenate
General equation
- Reaction of oxidizable species and reducible species
- Oxidizable speciesReducing agent + Reducible speciesOxidizing agent🔥⟶ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Reaction of potassium iodide and magnesium arsenate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| KI | Potassium iodide | 10 | Reducing | Oxidizable |
| Mg3(AsO4)2 | Magnesium arsenate | 1 | Oxidizing | Reducible |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| K2O | Potassium oxide | 5 | – | – |
| 2 | Oxidized | – | ||
| 2 | Reduced | – | ||
| MgO | Magnesium oxide | 3 | – | – |
Thermodynamic changes
Changes in standard condition
- Reaction of potassium iodide and magnesium arsenate
- 10KICrystalline solid + Mg3(AsO4)2Crystalline solid5K2OCrystalline solid + 2Crystalline solid + 2Crystalline solid + 3MgOCrystalline solid🔥⟶
| 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 | 2654.0 | – | – | – |
per 1 mol of | 265.40 | – | – | – |
per 1 mol of | 2654.0 | – | – | – |
per 1 mol of | 530.80 | – | – | – |
| 1327.0 | – | – | – | |
| 1327.0 | – | – | – | |
per 1 mol of | 884.67 | – | – | – |
Changes in aqueous solution
- Reaction of potassium iodide and magnesium arsenate
- 10KIIonized aqueous solution + Mg3(AsO4)2Crystalline solid5K2OCrystalline solid + 2Un-ionized aqueous solution + 2Crystalline solid + 3MgOCrystalline solid🔥⟶
| 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 | 2495.9 | – | – | – |
per 1 mol of | 249.59 | – | – | – |
per 1 mol of | 2495.9 | – | – | – |
per 1 mol of | 499.18 | – | – | – |
| 1248.0 | – | – | – | |
| 1248.0 | – | – | – | |
per 1 mol of | 831.97 | – | – | – |
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] |
| Mg3(AsO4)2 (cr) | -3092.8[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 |
|---|---|---|---|---|
| K2O (cr) | -361.5[1] | -322.1[2] | 94.1[2] | 83.7[2] |
| K2O (g) | -63[1] | – | – | – |
| (cr) | 0[1] | 0[1] | 116.135[1] | 54.438[1] |
| (g) | 62.438[1] | 19.327[1] | 260.69[1] | 36.90[1] |
| (ao) | 22.6[1] | 16.40[1] | 137.2[1] | – |
| (cr) | -58.2[1] | -59.4[1] | 213.05[1] | 105.77[1] |
| (g) | – | – | 388.34[1] | 80.63[1] |
| MgO (cr) | -597.98[1] | -565.95[1] | 27.91[1] | 37.66[1] |
| MgO (g) | 17[1] | – | – | – |
* (cr):Crystalline solid, (g):Gas, (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°, -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°, -3092.8 kJ · mol−1
- ^ ΔfH°, -361.5 kJ · mol−1
- ^ ΔfH°, -63. kJ · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 116.135 J · K−1 · mol−1
- ^ Cp°, 54.438 J · K−1 · mol−1
- ^ ΔfH°, 62.438 kJ · mol−1
- ^ ΔfG°, 19.327 kJ · mol−1
- ^ S°, 260.69 J · K−1 · mol−1
- ^ Cp°, 36.90 J · K−1 · mol−1
- ^ ΔfH°, 22.6 kJ · mol−1
- ^ ΔfG°, 16.40 kJ · mol−1
- ^ S°, 137.2 J · K−1 · mol−1
- ^ ΔfH°, -58.2 kJ · mol−1
- ^ ΔfG°, -59.4 kJ · mol−1
- ^ S°, 213.05 J · K−1 · mol−1
- ^ Cp°, 105.77 J · K−1 · mol−1
- ^ S°, 388.34 J · K−1 · mol−1
- ^ Cp°, 80.63 J · K−1 · mol−1
- ^ ΔfH°, -597.98 kJ · mol−1
- ^ ΔfG°, -565.95 kJ · mol−1
- ^ S°, 27.91 J · K−1 · mol−1
- ^ Cp°, 37.66 J · K−1 · mol−1
- ^ ΔfH°, 17. 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