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2H2S + 3KClO3 → 2H2SO3 + 3KClO

The reaction of hydrogen sulfide and potassium chlorate yields sulfurous acid and potassium hypochlorite (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

General equation

Reaction of reducing species and oxidizing species
Reducing speciesReducing agent + Oxidizing speciesOxidizing agent
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
H2SHydrogen sulfide2
Reducing
Reducing
KClO3Potassium chlorate3
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
H2SO3Sulfurous acid2
Oxidized
KClOPotassium hypochlorite3
Reduced

Thermodynamic changes

Changes in aqueous solution

Reaction of hydrogen sulfide and potassium chlorate
ΔrG−1106.3 kJ/mol
K6.54 × 10193
pK−193.82
2H2SUn-ionized aqueous solution + 3KClO3Ionized aqueous solution
2H2SO3Un-ionized aqueous solution + 3KClOIonized 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
−1147.4−1106.3−134
per 1 mol of
−573.70−553.15−67.0
per 1 mol of
−382.47−368.77−44.7
per 1 mol of
−573.70−553.15−67.0
−382.47−368.77−44.7

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
H2S (g)-20.63[1]-33.56[1]205.79[1]34.23[1]
H2S (ao)-39.7[1]-27.83[1]121[1]
KClO3 (cr)-397.73[1]-296.25[1]143.1[1]100.25[1]
KClO3 (ai)-356.35[1]-291.22[1]264.8[1]
* (g):Gas, (ao):Un-ionized aqueous solution, (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
H2SO3 (ao)-608.81[1]-537.81[1]232.2[1]
KClO (ai)-359.4[1]-320.0[1]146[1]
* (ao):Un-ionized aqueous solution, (ai):Ionized aqueous solution

References

List of references

  1. 1