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2Na3[Fe(CN)6] + 6H2O 💧⚡→ 6NaCN + 2FeCO3 + 3NH4CN + C

Electrolysis of aqueous sodium hexacyanidoferrate(III) yields sodium cyanide, iron(II) carbonate, ammonium cyanide, and carbon (Other reactions are here). This reaction is an oxidation-reduction 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

Electrolysis of aqueous solution with water as non redox agent
Miscible with water/Very soluble in water/Soluble in waterSelf redox agent + H2ONon-redox agent
💧⚡
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Electrolysis of aqueous sodium hexacyanidoferrate(III) with water as non-redox agent

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
Na3[Fe(CN)6]Sodium hexacyanidoferrate(III)2
Oxidizing
Soluble in water
H2OWater6
Water

Products

Chemical formulaNameCoefficientTypeType in general
equation
NaCNSodium cyanide6
FeCO3Iron(II) carbonate2
Redoxed product
NH4CNAmmonium cyanide3
CCarbon1
Reduced

Thermodynamic changes

Changes in aqueous solution (1)

Electrolysis of aqueous sodium hexacyanidoferrate(III) with water as non-redox agent
ΔrG−55.8 kJ/mol
K5.97 × 109
pK−9.78
2Na3[Fe(CN)6]Ionized aqueous solution + 6H2OLiquid
💧⚡
6NaCNIonized aqueous solution + 2FeCO3Crystalline solidsiderite + 3NH4CNIonized aqueous solution + CCrystalline solidgraphite
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
68.0−55.8418.6
34.0−27.9209.3
per 1 mol of
11.3−9.3069.77
per 1 mol of
11.3−9.3069.77
per 1 mol of
34.0−27.9209.3
per 1 mol of
22.7−18.6139.5
per 1 mol of
68.0−55.8418.6

Changes in aqueous solution (2)

Electrolysis of aqueous sodium hexacyanidoferrate(III) with water as non-redox agent
2Na3[Fe(CN)6]Ionized aqueous solution + 6H2OLiquid
💧⚡
6NaCNIonized aqueous solution + 2FeCO3Crystalline solidsiderite + 3NH4CNAqueous solution + CCrystalline solidgraphite
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
110.6
55.30
per 1 mol of
18.43
per 1 mol of
18.43
per 1 mol of
55.30
per 1 mol of
36.87
per 1 mol of
110.6

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
Na3[Fe(CN)6] (ai)-158.6[1]-56.4[1]447.3[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]
* (ai):Ionized aqueous solution, (cr):Crystalline solid, (l):Liquid, (g):Gas

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
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]
FeCO3 (cr)
siderite
-740.57[1]-666.67[1]92.9[1]82.13[1]
NH4CN (cr)0.42[1]134[1]
NH4CN (ai)18.0[1]93.0[1]207.5[1]
NH4CN (aq)32.2[1]
C (cr)
graphite
0[1]0[1]5.740[1]8.527[1]
C (cr)
diamond
1.895[1]2.900[1]2.377[1]6.113[1]
C (g)716.682[1]671.257[1]158.096[1]20.838[1]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (aq):Aqueous solution

References

List of references

  1. 1
    Janiel J. Reed (1989)
    The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units
    National Institute of Standards and Technology (NIST)