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8FeCl3 + 4H2O 💧⚡→ 8FeCl2 + HClO4 + 7HCl↑

Electrolysis of aqueous iron(III) chloride with water as non-redox agent

Electrolysis of aqueous iron(III) chloride yields iron(II) chloride, perchloric acid, and hydrogen chloride (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

Electrolysis of aqueous iron(III) chloride with water as non-redox agent

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 iron(III) chloride with water as non-redox agent

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
FeCl3Iron(III) chloride8
Self redox agent
Very soluble in water
H2OWater4
Water

Products

Chemical formulaNameCoefficientTypeType in general
equation
FeCl2Iron(II) chloride8
Reduced
HClO4Perchloric acid1
Oxidized
HClHydrogen chloride7

Thermodynamic changes

Changes in standard condition

Electrolysis of aqueous iron(III) chloride with water as non-redox agent
8FeCl3Crystalline solid + 4H2OLiquid
💧⚡
8FeCl2Crystalline solid + HClO4Liquid + 7HClGas
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
918.19
per 1 mol of
114.77
per 1 mol of
229.55
per 1 mol of
114.77
per 1 mol of
918.19
per 1 mol of
131.17

Changes in aqueous solution (1)

Electrolysis of aqueous iron(III) chloride with water as non-redox agent
ΔrG1276.1 kJ/mol
K0.27 × 10−223
pK223.56
8FeCl3Un-ionized aqueous solution + 4H2OLiquid
💧⚡
8FeCl2Un-ionized aqueous solution + HClO4Ionized aqueous solution + 7HClGas
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
1276.1
per 1 mol of
159.51
per 1 mol of
319.02
per 1 mol of
159.51
per 1 mol of
1276.1
per 1 mol of
182.30

Changes in aqueous solution (2)

Electrolysis of aqueous iron(III) chloride with water as non-redox agent
ΔrG1024.6 kJ/mol
K0.31 × 10−179
pK179.50
8FeCl3Un-ionized aqueous solution + 4H2OLiquid
💧⚡
8FeCl2Un-ionized aqueous solution + HClO4Ionized aqueous solution + 7HClIonized 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
1024.6
per 1 mol of
128.07
per 1 mol of
256.15
per 1 mol of
128.07
per 1 mol of
1024.6
per 1 mol of
146.37

Changes in aqueous solution (3)

Electrolysis of aqueous iron(III) chloride with water as non-redox agent
ΔrG778.2 kJ/mol
K0.46 × 10−136
pK136.33
8FeCl3Un-ionized aqueous solution + 4H2OLiquid
💧⚡
8FeCl2Ionized aqueous solution + HClO4Ionized aqueous solution + 7HClGas
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
778.2
per 1 mol of
97.28
per 1 mol of
194.6
per 1 mol of
97.28
per 1 mol of
778.2
per 1 mol of
111.2

Changes in aqueous solution (4)

Electrolysis of aqueous iron(III) chloride with water as non-redox agent
ΔrG526.7 kJ/mol
K0.53 × 10−92
pK92.27
8FeCl3Un-ionized aqueous solution + 4H2OLiquid
💧⚡
8FeCl2Ionized aqueous solution + HClO4Ionized aqueous solution + 7HClIonized 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
526.7
per 1 mol of
65.84
per 1 mol of
131.7
per 1 mol of
65.84
per 1 mol of
526.7
per 1 mol of
75.24

Changes in aqueous solution (5)

Electrolysis of aqueous iron(III) chloride with water as non-redox agent
ΔrG1226.5 kJ/mol
K0.13 × 10−214
pK214.87
8FeCl3Ionized aqueous solution + 4H2OLiquid
💧⚡
8FeCl2Un-ionized aqueous solution + HClO4Ionized aqueous solution + 7HClGas
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
1226.5
per 1 mol of
153.31
per 1 mol of
306.63
per 1 mol of
153.31
per 1 mol of
1226.5
per 1 mol of
175.21

Changes in aqueous solution (6)

Electrolysis of aqueous iron(III) chloride with water as non-redox agent
ΔrG975.0 kJ/mol
K0.15 × 10−170
pK170.81
8FeCl3Ionized aqueous solution + 4H2OLiquid
💧⚡
8FeCl2Un-ionized aqueous solution + HClO4Ionized aqueous solution + 7HClIonized 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
975.0
per 1 mol of
121.9
per 1 mol of
243.8
per 1 mol of
121.9
per 1 mol of
975.0
per 1 mol of
139.3

Changes in aqueous solution (7)

Electrolysis of aqueous iron(III) chloride with water as non-redox agent
ΔrG728.6 kJ/mol
K0.23 × 10−127
pK127.65
8FeCl3Ionized aqueous solution + 4H2OLiquid
💧⚡
8FeCl2Ionized aqueous solution + HClO4Ionized aqueous solution + 7HClGas
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
1382.2728.62184.3
per 1 mol of
172.7891.08273.04
per 1 mol of
345.55182.2546.08
per 1 mol of
172.7891.08273.04
per 1 mol of
1382.2728.62184.3
per 1 mol of
197.46104.1312.04

Changes in aqueous solution (8)

Electrolysis of aqueous iron(III) chloride with water as non-redox agent
ΔrG477.1 kJ/mol
K0.26 × 10−83
pK83.58
8FeCl3Ionized aqueous solution + 4H2OLiquid
💧⚡
8FeCl2Ionized aqueous solution + HClO4Ionized aqueous solution + 7HClIonized 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
858.3477.11271.5
per 1 mol of
107.359.64158.94
per 1 mol of
214.6119.3317.88
per 1 mol of
107.359.64158.94
per 1 mol of
858.3477.11271.5
per 1 mol of
122.668.16181.64

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
FeCl3 (cr)-399.49[1]-334.00[1]142.3[1]96.65[1]
FeCl3 (g)-254.0[1]
FeCl3 (ai)-550.2[1]-398.3[1]-146.4[1]
FeCl3 (ao)-404.5[1]
FeCl3 (cr)
6 hydrate
-2223.8[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]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (l):Liquid

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
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]
HClO4 (l)-40.58[1]
HClO4 (ai)-129.33[1]-8.52[1]182.0[1]
HClO4 (cr)
1 hydrate
-382.21[1]
HClO4 (l)
2 hydrate
-677.98[1]
HCl (g)-92.307[1]-95.299[1]186.908[1]29.12[1]
HCl (ai)-167.159[1]-131.228[1]56.5[1]-136.4[1]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (l):Liquid

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)