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3FeCl2 + 2K3[Fe(CN)6] 💧→ Fe2[Fe(CN)6]↓ + 6KCl + Fe[Fe(CN)6]

The reaction of iron(II) chloride and potassium hexacyanidoferrate(III) yields iron(II) hexacyanidoferrate(II), potassium chloride, and iron(III) hexacyanidoferrate(III) (Other reactions are here). This reaction is an acid-base reaction and is classified as follows:

Table of contents
  1. 1Reaction data
  2. 2Thermodynamic changes
  3. 3References
  4. 4Related reactions
  5. 5Related categories

Reaction data

Chemical equation

General equation

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
FeCl2Iron(II) chloride3
Lewis acid
Very soluble in water
K3[Fe(CN)6]Potassium hexacyanidoferrate(III)2
Lewis base
Very soluble in water

Products

Chemical formulaNameCoefficientTypeType in general
equation
Fe2[Fe(CN)6]Iron(II) hexacyanidoferrate(II)1
Lewis conjugate
Insoluble in water
KClPotassium chloride6
Non-redox product
Fe[Fe(CN)6]Iron(III) hexacyanidoferrate(III)1
Non-redox product

Thermodynamic changes

Thermodynamic data of reactants

Chemical formulaStandard 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
FeCl2 (cr)-341.79[1]-302.30[1]117.95[1]76.65[1]
FeCl2 (g)-148.5[1]
FeCl2 (ai)-423.4[1]-341.34[1]-24.7[1]
FeCl2 (ao)-279.1[1]
FeCl2 (cr)
2 hydrate
-953.1[1]
FeCl2 (cr)
4 hydrate
-1549.3[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]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution

Thermodynamic data of products

Chemical formulaStandard 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
Fe2[Fe(CN)6]
KCl (cr)-436.747[1]-409.14[1]82.59[1]51.30[1]
KCl (g)-214.14[1]-233.0[1]239.10[1]36.48[1]
KCl (ai)-419.53[1]-414.49[1]159.0[1]-114.6[1]
Fe[Fe(CN)6]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution

References

List of references

  1. 1