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3KOH + 2e → K2O + KH + 2OH

Reduction of potassium hydroxide
3KOHPotassium hydroxide + 2eElectron
K2OPotassium oxide + KHPotassium hydride + 2OHHydroxide ion

Reduction of potassium hydroxide yields potassium oxide, potassium hydride, and hydroxide 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 hydroxide
3KOHPotassium hydroxide + 2eElectron
K2OPotassium oxide + KHPotassium hydride + 2OHHydroxide ion

General equation

Reduction of reducible species
ReactantOxidizing agent + e
ProductReduction product

Oxidation state of each atom

Reduction of potassium hydroxide

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
KOHPotassium hydroxide3
Oxidizing
eElectron2
Electron

Products

Chemical formulaNameCoefficientTypeType in general
equation
K2OPotassium oxide1
KHPotassium hydride1
Reduced
OHHydroxide ion2

Thermodynamic changes

Changes in standard condition

Reduction of potassium hydroxide
3KOHIonized aqueous solution + 2e
K2OCrystalline solid + KHCrystalline solid + 2OHUn-ionized 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
567.9
189.3
per 1 mol of
Electron
283.9
per 1 mol of
567.9
per 1 mol of
567.9
per 1 mol of
Hydroxide ion
283.9

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
KOH (cr)-424.764[1]-379.08[1]78.9[1]64.9[1]
KOH (g)-231.0[1]-232.6[1]238.3[1]49.20[1]
KOH (ai)-482.37[1]-440.50[1]91.6[1]-126.8[1]
KOH (cr)
1 hydrate
-748.9[1]-645.1[1]117.2[1]
KOH (cr)
2 hydrate
-1051.0[1]-887.3[1]150.6[1]
e
* (cr):Crystalline solid, (g):Gas, (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
K2O (cr)-361.5[1]-322.1[2]94.1[2]83.7[2]
K2O (g)-63[1]
KH (cr)-57.74[1]
KH (g)130[1]113[1]192.41[1]31.049[1]
OH (g)-143.5[1]
OH (ao)-229.994[1]-157.244[1]-10.75[1]-148.5[1]
* (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