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Au(OH)3 + 5e → Au + OH + 2O2− + H2

Reduction of gold(III) hydroxide
Au(OH)3Gold(III) hydroxide + 5eElectron
AuGold + OHHydroxide ion + 2O2−Oxide ion + H2Hydrogen

Reduction of gold(III) hydroxide yields gold, hydroxide ion, oxide ion, and hydrogen (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

Reduction of gold(III) hydroxide
Au(OH)3Gold(III) hydroxide + 5eElectron
AuGold + OHHydroxide ion + 2O2−Oxide ion + H2Hydrogen

General equation

Reduction of reducible species
ReactantOxidizing agent + e
ProductReduction product

Oxidation state of each atom

Reduction of gold(III) hydroxide

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
Au(OH)3Gold(III) hydroxide1
Oxidizing
eElectron5
Electron

Products

Chemical formulaNameCoefficientTypeType in general
equation
AuGold1
Reduced
OHHydroxide ion1
O2−Oxide ion2
H2Hydrogen1
Reduced

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
Au(OH)3 (cr)
precipitated
-424.7[1]-316.92[1]189.5[1]
Au(OH)3 (ao)-283.37[1]
e
* (cr):Crystalline solid, (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
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]
OH (g)-143.5[1]
OH (ao)-229.994[1]-157.244[1]-10.75[1]-148.5[1]
O2−
H2 (g)0[1]0[1]130.684[1]28.824[1]
H2 (ao)-4.2[1]17.6[1]577[1]
* (cr):Crystalline solid, (g):Gas, (ao):Un-ionized aqueous solution

References

List of references

  1. 1