3K4[Fe(CN)6] + 6Na2CrO4 💧→ 6K2CrO4↓ + Fe2[Fe(CN)6]↓ + 12NaCN
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The reaction of potassium hexacyanidoferrate(II) and sodium chromate yields potassium chromate, iron(II) hexacyanidoferrate(II), and sodium cyanide (Other reactions are here). This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of potassium hexacyanidoferrate(II) and sodium chromate
General equation
- Precipitation reaction
- Miscible with water/Very soluble in water/Soluble in waterLewis acid + Miscible with water/Very soluble in water/Soluble in waterLewis base💧⟶ Insoluble in water/Very slightly soluble in water/Slightly soluble in waterLewis conjugate + Product(Non-redox product)
Oxidation state of each atom
- Reaction of potassium hexacyanidoferrate(II) and sodium chromate
Reactants
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
K4[Fe(CN)6] | Potassium hexacyanidoferrate(II) | 3 | Lewis acid | Soluble in water |
Na2CrO4 | Sodium chromate | 6 | Lewis base | Very soluble in water |
Products
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
K2CrO4 | Potassium chromate | 6 | Lewis conjugate | Insoluble in water |
Fe2[Fe(CN)6] | Iron(II) hexacyanidoferrate(II) | 1 | Lewis conjugate | Insoluble in water |
NaCN | Sodium cyanide | 12 | Non-redox product | – |
Thermodynamic changes
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 |
---|---|---|---|---|
K4[Fe(CN)6] (cr) | -594.1[1] | -453.0[1] | 418.8[1] | 332.21[1] |
K4[Fe(CN)6] (ai) | -554.0[1] | -438.01[1] | 505.0[1] | – |
K4[Fe(CN)6] (cr) 3 hydrate | -1466.5[1] | -1168.8[1] | 593.7[1] | 482.42[1] |
Na2CrO4 (cr) | -1342.2[1] | -1234.93[1] | 176.61[1] | 142.13[1] |
Na2CrO4 (ai) | -1361.39[1] | -1251.58[1] | 168.2[1] | – |
Na2CrO4 (cr) 4 hydrate | -2528.8[1] | – | – | – |
Na2CrO4 (cr) 10 hydrate | -4281.1[1] | – | – | – |
* (cr):Crystalline solid, (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 |
---|---|---|---|---|
K2CrO4 (cr) | -1403.7[1] | -1295.7[1] | 200.12[1] | 145.98[1] |
K2CrO4 (ai) | -1385.91[1] | -1294.30[1] | 255.2[1] | – |
Fe2[Fe(CN)6] | – | – | – | – |
NaCN (cr) cubic | -87.49[1] | -76.43[1] | 115.60[1] | 70.37[1] |
NaCN (cr) orthorhombic | -90.75[1] | – | – | – |
NaCN (g) | 109[1] | 79.94[1] | 249.43[1] | 51.17[1] |
NaCN (ai) | -89.5[1] | -89.5[1] | 153.1[1] | – |
NaCN (cr) 1/2 hydrate | -235.77[1] | – | – | – |
NaCN (cr) 2 hydrate | -679.77[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°, -594.1 kJ · mol−1
- ^ ΔfG°, -453.0 kJ · mol−1
- ^ S°, 418.8 J · K−1 · mol−1
- ^ Cp°, 332.21 J · K−1 · mol−1
- ^ ΔfH°, -554.0 kJ · mol−1
- ^ ΔfG°, -438.01 kJ · mol−1
- ^ S°, 505.0 J · K−1 · mol−1
- ^ ΔfH°, -1466.5 kJ · mol−1
- ^ ΔfG°, -1168.8 kJ · mol−1
- ^ S°, 593.7 J · K−1 · mol−1
- ^ Cp°, 482.42 J · K−1 · mol−1
- ^ ΔfH°, -1342.2 kJ · mol−1
- ^ ΔfG°, -1234.93 kJ · mol−1
- ^ S°, 176.61 J · K−1 · mol−1
- ^ Cp°, 142.13 J · K−1 · mol−1
- ^ ΔfH°, -1361.39 kJ · mol−1
- ^ ΔfG°, -1251.58 kJ · mol−1
- ^ S°, 168.2 J · K−1 · mol−1
- ^ ΔfH°, -2528.8 kJ · mol−1
- ^ ΔfH°, -4281.1 kJ · mol−1
- ^ ΔfH°, -1403.7 kJ · mol−1
- ^ ΔfG°, -1295.7 kJ · mol−1
- ^ S°, 200.12 J · K−1 · mol−1
- ^ Cp°, 145.98 J · K−1 · mol−1
- ^ ΔfH°, -1385.91 kJ · mol−1
- ^ ΔfG°, -1294.30 kJ · mol−1
- ^ S°, 255.2 J · K−1 · mol−1
- ^ ΔfH°, -87.49 kJ · mol−1
- ^ ΔfG°, -76.43 kJ · mol−1
- ^ S°, 115.60 J · K−1 · mol−1
- ^ Cp°, 70.37 J · K−1 · mol−1
- ^ ΔfH°, -90.75 kJ · mol−1
- ^ ΔfH°, 109. kJ · mol−1
- ^ ΔfG°, 79.94 kJ · mol−1
- ^ S°, 249.43 J · K−1 · mol−1
- ^ Cp°, 51.17 J · K−1 · mol−1
- ^ ΔfH°, -89.5 kJ · mol−1
- ^ ΔfG°, -89.5 kJ · mol−1
- ^ S°, 153.1 J · K−1 · mol−1
- ^ ΔfH°, -235.77 kJ · mol−1
- ^ ΔfH°, -679.77 kJ · mol−1