9Na4[Fe(CN)6] + 39KMnO4 🔥→ 36NaMnO4 + 5K3[Fe(CN)6] + 2Fe2O3 + 3MnO2 + 24KCN
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The reaction of sodium hexacyanidoferrate(II) and potassium permanganate yields sodium permanganate, potassium hexacyanidoferrate(III), iron(III) oxide, manganese(IV) oxide, and potassium cyanide (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 hexacyanidoferrate(II) and potassium permanganate
General equation
- Reaction of reducing species and oxidizing species
- Reducing speciesReducing agent + Oxidizing speciesOxidizing agent ⟶ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Reaction of sodium hexacyanidoferrate(II) and potassium permanganate
Reactants
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
Na4[Fe(CN)6] | Sodium hexacyanidoferrate(II) | 9 | Reducing | Reducing |
KMnO4 | Potassium permanganate | 39 | Oxidizing | Oxidizing |
Products
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
NaMnO4 | Sodium permanganate | 36 | – | – |
K3[Fe(CN)6] | Potassium hexacyanidoferrate(III) | 5 | Oxidized | – |
Fe2O3 | Iron(III) oxide | 2 | Oxidized | – |
MnO2 | Manganese(IV) oxide | 3 | Reduced | – |
KCN | Potassium cyanide | 24 | – | – |
Thermodynamic changes
Changes in aqueous solution
- Reaction of sodium hexacyanidoferrate(II) and potassium permanganate◆
ΔrG −8.7 kJ/mol K 3.34 × 101 pK −1.52 - 9Na4[Fe(CN)6]Ionized aqueous solution + 39KMnO4Ionized aqueous solution36NaMnO4Ionized aqueous solution + 5K3[Fe(CN)6]Ionized aqueous solution + 2Fe2O3Crystalline solid + 3MnO2Crystalline solid + 24KCNIonized 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 | 739.3 | −8.7 | 2515.3 | – |
per 1 mol of | 82.14 | −0.97 | 279.48 | – |
per 1 mol of | 18.96 | −0.22 | 64.495 | – |
per 1 mol of | 20.54 | −0.24 | 69.869 | – |
per 1 mol of | 147.9 | −1.7 | 503.06 | – |
per 1 mol of | 369.6 | −4.3 | 1257.7 | – |
per 1 mol of | 246.4 | −2.9 | 838.43 | – |
per 1 mol of | 30.80 | −0.36 | 104.80 | – |
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 |
---|---|---|---|---|
Na4[Fe(CN)6] (ai) | -505.0[1] | -352.53[1] | 331.0[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] |
* (ai):Ionized aqueous solution, (cr):Crystalline 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 |
---|---|---|---|---|
NaMnO4 (ai) | -781.6[1] | -709.1[1] | 250.2[1] | – |
NaMnO4 (cr) 1 hydrate | -1079.14[1] | – | – | – |
NaMnO4 (cr) 3 hydrate | -1672.85[1] | – | – | – |
K3[Fe(CN)6] (cr) | -249.8[1] | -129.6[1] | 426.06[1] | – |
K3[Fe(CN)6] (ai) | -195.4[1] | -120.4[1] | 577.8[1] | – |
Fe2O3 (cr) | -824.2[1] | -742.2[1] | 87.40[1] | 103.85[1] |
MnO2 (cr) | -520.03[1] | -465.14[1] | 53.05[1] | 54.14[1] |
MnO2 (am) precipitated | -502.5[1] | – | – | – |
KCN (cr) | -113.0[1] | -101.86[1] | 128.49[1] | 66.27[1] |
KCN (g) | 90.8[1] | 64.17[1] | 261.90[1] | 52.34[1] |
KCN (ai) | -101.7[1] | -110.9[1] | 196.6[1] | – |
* (ai):Ionized aqueous solution, (cr):Crystalline solid, (am):Amorphous solid, (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°, -505.0 kJ · mol−1
- ^ ΔfG°, -352.53 kJ · mol−1
- ^ S°, 331.0 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°, -781.6 kJ · mol−1
- ^ ΔfG°, -709.1 kJ · mol−1
- ^ S°, 250.2 J · K−1 · mol−1
- ^ ΔfH°, -1079.14 kJ · mol−1
- ^ ΔfH°, -1672.85 kJ · mol−1
- ^ ΔfH°, -249.8 kJ · mol−1
- ^ ΔfG°, -129.6 kJ · mol−1
- ^ S°, 426.06 J · K−1 · mol−1
- ^ ΔfH°, -195.4 kJ · mol−1
- ^ ΔfG°, -120.4 kJ · mol−1
- ^ S°, 577.8 J · K−1 · mol−1
- ^ ΔfH°, -824.2 kJ · mol−1
- ^ ΔfG°, -742.2 kJ · mol−1
- ^ S°, 87.40 J · K−1 · mol−1
- ^ Cp°, 103.85 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°, -113.0 kJ · mol−1
- ^ ΔfG°, -101.86 kJ · mol−1
- ^ S°, 128.49 J · K−1 · mol−1
- ^ Cp°, 66.27 J · K−1 · mol−1
- ^ ΔfH°, 90.8 kJ · mol−1
- ^ ΔfG°, 64.17 kJ · mol−1
- ^ S°, 261.90 J · K−1 · mol−1
- ^ Cp°, 52.34 J · K−1 · mol−1
- ^ ΔfH°, -101.7 kJ · mol−1
- ^ ΔfG°, -110.9 kJ · mol−1
- ^ S°, 196.6 J · K−1 · mol−1