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2K2S2O3 + 14e → 2K + 2S22− + K2O + 5O2−

Reduction of potassium thiosulfate
2K2S2O3Potassium thiosulfate + 14eElectron
2KPotassium + 2S22−Disulfide ion + K2OPotassium oxide + 5O2−Oxide ion

Reduction of potassium thiosulfate yields potassium, disulfide ion, potassium oxide, and oxide ion (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 potassium thiosulfate
2K2S2O3Potassium thiosulfate + 14eElectron
2KPotassium + 2S22−Disulfide ion + K2OPotassium oxide + 5O2−Oxide ion

General equation

Reduction of reducible species
ReactantOxidizing agent + e
ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
K2S2O3Potassium thiosulfate2
Oxidizing
eElectron14
Electron

Products

Chemical formulaNameCoefficientTypeType in general
equation
KPotassium2
Reduced
S22−Disulfide ion2
Reduced
K2OPotassium oxide1
O2−Oxide ion5

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
K2S2O3 (cr)-1173.6[1]
K2S2O3 (ai)-1156.9[1]-1089.0[1]272[1]
K2S2O3 (cr)
1 hydrate
-1464.8[1]
e
* (cr):Crystalline solid, (ai):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
K (cr)0[1]0[1]64.18[1]29.58[1]
K (g)89.24[1]60.59[1]160.336[1]20.786[1]
S22− (ao)30.1[1]79.5[1]28.5[1]
K2O (cr)-361.5[1]-322.1[2]94.1[2]83.7[2]
K2O (g)-63[1]
O2−
* (cr):Crystalline solid, (g):Gas, (ao):Un-ionized aqueous solution

References

List of references

  1. 1
  2. 2
    James G. Speight (2017)
    Lange's Handbook of Chemistry, 17th edition
    McGraw Hill Education