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2KClO + H2SeO4 → K2SeO4 + HClO2 + HCl↑

The reaction of potassium hypochlorite and selenic acid yields potassium selenate, chlorous acid, and hydrogen chloride (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 self redoxing species and acid
Self-redoxing speciesSelf redox agent + AcidNon-redox agent
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
KClOPotassium hypochlorite2
Self redoxing
H2SeO4Selenic acid1
Acid

Products

Chemical formulaNameCoefficientTypeType in general
equation
K2SeO4Potassium selenate1
HClO2Chlorous acid1
Oxidized
HClHydrogen chloride1
Reduced

Thermodynamic changes

Changes in aqueous solution (1)

Reaction of potassium hypochlorite and selenic acid
2KClOIonized aqueous solution + H2SeO4Crystalline solid
K2SeO4Ionized aqueous solution + HClO2Un-ionized aqueous solution + HClGas
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
1.0
0.50
per 1 mol of
1.0
per 1 mol of
1.0
per 1 mol of
1.0
per 1 mol of
1.0

Changes in aqueous solution (2)

Reaction of potassium hypochlorite and selenic acid
2KClOIonized aqueous solution + H2SeO4Crystalline solid
K2SeO4Ionized aqueous solution + HClO2Un-ionized aqueous solution + HClIonized 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
−73.9
−37.0
per 1 mol of
−73.9
per 1 mol of
−73.9
per 1 mol of
−73.9
per 1 mol of
−73.9

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
KClO (ai)-359.4[1]-320.0[1]146[1]
H2SeO4 (cr)-530.1[1]
H2SeO4 (cr)
1 hydrate
-840.6[1]
H2SeO4 (l)
1 hydrate
-820.5[1]
* (ai):Ionized aqueous solution, (cr):Crystalline solid, (l):Liquid

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
K2SeO4 (cr)-1110.02[1]-1002.8[1]222[1]
K2SeO4 (ai)-1103.7[1]-1007.9[1]259.0[1]
HClO2 (ao)-51.9[1]5.9[1]188.3[1]
HCl (g)-92.307[1]-95.299[1]186.908[1]29.12[1]
HCl (ai)-167.159[1]-131.228[1]56.5[1]-136.4[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (g):Gas

References

List of references

  1. 1