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3FeO + Na[AuCl4] → Fe2O3 + FeCl3 + Au + NaCl

3FeO + Na[AuCl₄] → Fe₂O₃ + FeCl₃ + Au + NaCl

Last updated: May 12, 2022

Reaction of iron(II) oxide and sodium tetrachloridoaurate(III): 3FeOIron(II) oxide + Na[AuCl₄]Sodium tetrachloridoaurate(III)
⟶
Fe₂O₃Iron(III) oxide + FeCl₃Iron(III) chloride + AuGold + NaClSodium chloride

The reaction of iron(II) oxide and sodium tetrachloridoaurate(III) yields iron(III) oxide, iron(III) chloride, gold, and sodium chloride (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:

Reaction of oxidizable species and oxidizing species

Table of contents

Reaction data

Chemical equation

Reaction of iron(II) oxide and sodium tetrachloridoaurate(III): 3FeOIron(II) oxide + Na[AuCl₄]Sodium tetrachloridoaurate(III)
⟶
Fe₂O₃Iron(III) oxide + FeCl₃Iron(III) chloride + AuGold + NaClSodium chloride

General equation

Reaction of oxidizable species and oxidizing species: Oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent
⟶
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reaction of iron(II) oxide and sodium tetrachloridoaurate(III)

Reactants

Chemical formula	Name	Coefficient	Type	Type in general equation
FeO	Iron(II) oxide	3	Reducing	Oxidizable
Na[AuCl₄]	Sodium tetrachloridoaurate(III)	1	Oxidizing	Oxidizing

Products

Chemical formula	Name	Coefficient	Type	Type in general equation
Fe₂O₃	Iron(III) oxide	1	Oxidized	–
FeCl₃	Iron(III) chloride	1	Oxidized	–
Au	Gold	1	Reduced	–
NaCl	Sodium chloride	1	–	–

Thermodynamic changes

Changes in aqueous solution (1)

Reaction of iron(II) oxide and sodium tetrachloridoaurate(III): 3FeOCrystalline solid + Na[AuCl₄]Ionized aqueous solution
⟶
Fe₂O₃Crystalline solid + FeCl₃Un-ionized aqueous solution + AuCrystalline solid + NaClIonized aqueous solution

	Standard enthalpy of reaction Δ_rH° kJ · mol⁻¹	Standard Gibbs energy of reaction Δ_rG° kJ · mol⁻¹	Standard entropy of reaction Δ_rS° J · K⁻¹ · mol⁻¹	Standard heat capacity of reaction at constant pressure Δ_rC_p° J · K⁻¹ · mol⁻¹
per 1 mol of Equation	–	–	–	–
per 1 mol of Iron(II) oxide	–	–	–	–
per 1 mol of Sodium tetrachloridoaurate(III)	–	–	–	–
per 1 mol of Iron(III) oxide	–	–	–	–
per 1 mol of Iron(III) chloride	–	–	–	–
per 1 mol of Gold	–	–	–	–
per 1 mol of Sodium chloride	–	–	–	–

Changes in aqueous solution (2)

Reaction of iron(II) oxide and sodium tetrachloridoaurate(III): 3FeOCrystalline solid + Na[AuCl₄]Ionized aqueous solution
⟶
Fe₂O₃Crystalline solid + FeCl₃Ionized aqueous solution + AuCrystalline solid + NaClIonized aqueous solution

	Standard enthalpy of reaction Δ_rH° kJ · mol⁻¹	Standard Gibbs energy of reaction Δ_rG° kJ · mol⁻¹	Standard entropy of reaction Δ_rS° J · K⁻¹ · mol⁻¹	Standard heat capacity of reaction at constant pressure Δ_rC_p° J · K⁻¹ · mol⁻¹
per 1 mol of Equation	−403.4	–	–	–
per 1 mol of Iron(II) oxide	−134.5	–	–	–
per 1 mol of Sodium tetrachloridoaurate(III)	−403.4	–	–	–
per 1 mol of Iron(III) oxide	−403.4	–	–	–
per 1 mol of Iron(III) chloride	−403.4	–	–	–
per 1 mol of Gold	−403.4	–	–	–
per 1 mol of Sodium chloride	−403.4	–	–	–

Thermodynamic data of reactants

Chemical formula	Standard enthalpy of formation Δ_fH° kJ · mol⁻¹	Standard Gibbs energy of formation Δ_fG° kJ · mol⁻¹	Standard molar entropy S° J · K⁻¹ · mol⁻¹	Standard molar heat capacity at constant pressure C_p° J · K⁻¹ · mol⁻¹
FeO (cr)	-272.0^[1]	–	–	–
Na[AuCl₄] (ai)	-562.3^[1]	-497.04^[1]	325.9^[1]	–

* (cr):Crystalline solid, (ai):Ionized aqueous solution

Thermodynamic data of products

Chemical formula	Standard enthalpy of formation Δ_fH° kJ · mol⁻¹	Standard Gibbs energy of formation Δ_fG° kJ · mol⁻¹	Standard molar entropy S° J · K⁻¹ · mol⁻¹	Standard molar heat capacity at constant pressure C_p° J · K⁻¹ · mol⁻¹
Fe₂O₃ (cr)	-824.2^[1]	-742.2^[1]	87.40^[1]	103.85^[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]	–	–	–
Au (cr)	0^[1]	0^[1]	47.40^[1]	25.418^[1]
Au (g)	366.1^[1]	326.3^[1]	180.503^[1]	20.786^[1]
NaCl (cr)	-411.153^[1]	-384.138^[1]	72.13^[1]	50.50^[1]
NaCl (g)	-176.65^[1]	-196.66^[1]	229.81^[1]	35.77^[1]
NaCl (ai)	-407.27^[1]	-393.133^[1]	115.5^[1]	-90.0^[1]

* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution

References

List of references

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
https://doi.org/10.18434/M32124
National Institute of Standards and Technology (NIST)
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