8CsI + 2KMnO4 + 8H+ → 8Cs+ + 3I2 + 2MnO2 + 2KI + 4H2O
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- Reaction of caesium iodide and potassium permanganate under acidic condition
- 8CsICaesium iodide + 2KMnO4Potassium permanganate + 8H+Hydrogen ion8Cs+Caesium ion + 3 + 2MnO2Manganese(IV) oxide + 2KIPotassium iodide + 4H2OWater⟶
The reaction of caesium iodide, potassium permanganate, and hydrogen ion yields caesium ion, , manganese(IV) oxide, potassium iodide, 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 caesium iodide and potassium permanganate under acidic condition
- 8CsICaesium iodide + 2KMnO4Potassium permanganate + 8H+Hydrogen ion8Cs+Caesium ion + 3 + 2MnO2Manganese(IV) oxide + 2KIPotassium iodide + 4H2OWater⟶
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 caesium iodide and potassium permanganate under acidic condition
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CsI | Caesium iodide | 8 | Reducing | Oxidizable |
| KMnO4 | Potassium permanganate | 2 | Oxidizing | Oxidizing under acidic condition |
| H+ | Hydrogen ion | 8 | – | Hydrogen ion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Cs+ | Caesium ion | 8 | – | – |
| 3 | Oxidized | – | ||
| MnO2 | Manganese(IV) oxide | 2 | Reduced | – |
| KI | Potassium iodide | 2 | – | – |
| H2O | Water | 4 | – | Water |
Thermodynamic changes
Changes in standard condition
- Reaction of caesium iodide and potassium permanganate under acidic condition◆
ΔrG −625.7 kJ/mol K 4.15 × 10109 pK −109.62
| 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 | −701.6 | −625.7 | −252.5 | – |
per 1 mol of | −87.70 | −78.21 | −31.56 | – |
per 1 mol of | −350.8 | −312.9 | −126.3 | – |
per 1 mol of Hydrogen ion | −87.70 | −78.21 | −31.56 | – |
per 1 mol of Caesium ion | −87.70 | −78.21 | −31.56 | – |
| −233.9 | −208.6 | −84.17 | – | |
per 1 mol of | −350.8 | −312.9 | −126.3 | – |
per 1 mol of | −350.8 | −312.9 | −126.3 | – |
per 1 mol of | −175.4 | −156.4 | −63.13 | – |
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 |
|---|---|---|---|---|
| CsI (cr) | -346.60[1] | -340.58[1] | 123.05[1] | 52.80[1] |
| CsI (g) | -151.9[1] | -191.2[1] | 275.29[1] | 37.45[1] |
| CsI (ai) | -313.47[1] | -343.59[1] | 244.3[1] | -152.7[1] |
| KMnO4 (cr) | -837.2[1] | -737.6[1] | 171.71[1] | 117.57[1] |
| KMnO4 (ai) | -793.8[1] | -730.5[1] | 293.7[1] | -60.2[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 |
|---|---|---|---|---|
| Cs+ (g) | 457.964[1] | – | – | – |
| Cs+ (ao) | -258.28[1] | -292.02[1] | 133.05[1] | -10.5[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] | – |
| MnO2 (cr) | -520.03[1] | -465.14[1] | 53.05[1] | 54.14[1] |
| MnO2 (am) precipitated | -502.5[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] |
| 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] |
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (am):Amorphous solid, (ai):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°, -346.60 kJ · mol−1
- ^ ΔfG°, -340.58 kJ · mol−1
- ^ S°, 123.05 J · K−1 · mol−1
- ^ Cp°, 52.80 J · K−1 · mol−1
- ^ ΔfH°, -151.9 kJ · mol−1
- ^ ΔfG°, -191.2 kJ · mol−1
- ^ S°, 275.29 J · K−1 · mol−1
- ^ Cp°, 37.45 J · K−1 · mol−1
- ^ ΔfH°, -313.47 kJ · mol−1
- ^ ΔfG°, -343.59 kJ · mol−1
- ^ S°, 244.3 J · K−1 · mol−1
- ^ Cp°, -152.7 J · K−1 · mol−1
- ^ ΔfH°, -837.2 kJ · mol−1
- ^ ΔfG°, -737.6 kJ · mol−1
- ^ S°, 171.71 J · K−1 · mol−1
- ^ Cp°, 117.57 J · K−1 · mol−1
- ^ ΔfH°, -793.8 kJ · mol−1
- ^ ΔfG°, -730.5 kJ · mol−1
- ^ S°, 293.7 J · K−1 · mol−1
- ^ Cp°, -60.2 J · K−1 · 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°, 457.964 kJ · mol−1
- ^ ΔfH°, -258.28 kJ · mol−1
- ^ ΔfG°, -292.02 kJ · mol−1
- ^ S°, 133.05 J · K−1 · mol−1
- ^ Cp°, -10.5 J · K−1 · 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°, -520.03 kJ · mol−1
- ^ ΔfG°, -465.14 kJ · mol−1
- ^ S°, 53.05 J · K−1 · mol−1
- ^ Cp°, 54.14 J · K−1 · mol−1
- ^ ΔfH°, -502.5 kJ · mol−1
- ^ 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°, -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