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16Au + 15NaClO2 + 54H+ 🔥→ 3H[AuCl4] + 13Au3+ + 15Na+ + 3HClO2 + 24H2O

Reaction of gold and sodium chlorite under acidic condition
16AuGold + 15NaClO2Sodium chlorite + 54H+Hydrogen ion
🔥
3H[AuCl4]Tetrachloridoauric(III) acid + 13Au3+Gold(III) ion + 15Na+Sodium ion + 3HClO2Chlorous acid + 24H2OWater

The reaction of gold, sodium chlorite, and hydrogen ion yields tetrachloridoauric(III) acid, gold(III) ion, sodium ion, chlorous acid, and water (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

Reaction of gold and sodium chlorite under acidic condition
16AuGold + 15NaClO2Sodium chlorite + 54H+Hydrogen ion
🔥
3H[AuCl4]Tetrachloridoauric(III) acid + 13Au3+Gold(III) ion + 15Na+Sodium ion + 3HClO2Chlorous acid + 24H2OWater

General equation

Reaction of hardly oxidizable species and oxidizing species under acidic condition
Hardly oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent + H+Non-redox agent
ProductOxidation product + ProductReduction product + H2ONon-redox product

Oxidation state of each atom

Reaction of gold and sodium chlorite under acidic condition

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
AuGold16
Reducing
Hardly oxidizable
NaClO2Sodium chlorite15
Oxidizing
Oxidizing under acidic condition
H+Hydrogen ion54
Hydrogen ion

Products

Chemical formulaNameCoefficientTypeType in general
equation
H[AuCl4]Tetrachloridoauric(III) acid3
Redoxed product
Au3+Gold(III) ion13
Oxidized
Na+Sodium ion15
HClO2Chlorous acid3
H2OWater24
Water

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 (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]
NaClO2 (cr)-307.02[1]
NaClO2 (ai)-306.7[1]-244.7[1]160.2[1]
NaClO2 (cr)
3 hydrate
-1192.77[1]
H+ (g)1536.202[1]
H+ (ao)0[1]0[1]0[1]0[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
H[AuCl4]
Au3+
Na+ (g)609.358[1]
Na+ (ao)-240.12[1]-261.905[1]59.0[1]46.4[1]
HClO2 (ao)-51.9[1]5.9[1]188.3[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]
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (l):Liquid

References

List of references

  1. 1