You-iggy
  1. Home
  2. Chemical reactions
  3. 3KSCN + 11KMnO4 → 3K2SO3 + 3K2CO3 + K2O + 3NO↑ + 11MnO2

3KSCN + 11KMnO4 → 3K2SO3 + 3K2CO3 + K2O + 3NO↑ + 11MnO2

Last updated:
Reaction of potassium thiocyanate and potassium permanganate
3KSCNPotassium thiocyanate + 11KMnO4Potassium permanganate
⟶
3K2SO3Potassium sulfite + 3K2CO3Potassium carbonate + K2OPotassium oxide + 3NO↑Nitrogen monoxide + 11MnO2Manganese(IV) oxide

The reaction of potassium thiocyanate and potassium permanganate yields potassium sulfite, potassium carbonate, potassium oxide, nitrogen monoxide, and manganese(IV) oxide (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 potassium thiocyanate and potassium permanganate
3KSCNPotassium thiocyanate + 11KMnO4Potassium permanganate
⟶
3K2SO3Potassium sulfite + 3K2CO3Potassium carbonate + K2OPotassium oxide + 3NO↑Nitrogen monoxide + 11MnO2Manganese(IV) oxide

General equation

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

Oxidation state of each atom

Reaction of potassium thiocyanate and potassium permanganate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
KSCNPotassium thiocyanate3
Reducing
Reducing
KMnO4Potassium permanganate11
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
K2SO3Potassium sulfite3
Oxidized
–
K2CO3Potassium carbonate3
–
–
K2OPotassium oxide1
–
–
NONitrogen monoxide3
Oxidized
–
MnO2Manganese(IV) oxide11
Reduced
–

Thermodynamic changes

Changes in standard condition (1)

Reaction of potassium thiocyanate and potassium permanganate
3KSCNCrystalline solid + 11KMnO4Crystalline solid
⟶
3K2SO3Crystalline solid + 3K2CO3Crystalline solid + K2OCrystalline solid + 3NO↑Gas + 11MnO2Crystalline solid
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
−2831.0–––
−943.67–––
−257.36–––
per 1 mol of
−943.67–––
−943.67–––
per 1 mol of
−2831.0–––
per 1 mol of
−943.67–––
−257.36–––

Changes in standard condition (2)

Reaction of potassium thiocyanate and potassium permanganate
3KSCNCrystalline solid + 11KMnO4Crystalline solid
⟶
3K2SO3Crystalline solid + 3K2CO3Crystalline solid + K2OCrystalline solid + 3NO↑Gas + 11MnO2Amorphous solidprecipitated
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
−2638.1–––
−879.37–––
−239.83–––
per 1 mol of
−879.37–––
−879.37–––
per 1 mol of
−2638.1–––
per 1 mol of
−879.37–––
−239.83–––

Changes in aqueous solution

Reaction of potassium thiocyanate and potassium permanganate
◆
ΔrG−3014.2 kJ/mol
K1.16 × 10528
pK−528.06
3KSCNIonized aqueous solution + 11KMnO4Ionized aqueous solution
⟶
3K2SO3Ionized aqueous solution + 3K2CO3Ionized aqueous solution + K2OCrystalline solid + 3NO↑Gas + 11MnO2Crystalline solid
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
−3517.5−3014.2−1689–
−1172.5−1004.7−563.0–
−319.77−274.02−153.5–
per 1 mol of
−1172.5−1004.7−563.0–
−1172.5−1004.7−563.0–
per 1 mol of
−3517.5−3014.2−1689–
per 1 mol of
−1172.5−1004.7−563.0–
−319.77−274.02−153.5–

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
KSCN (cr)-200.16[1]-178.31[1]124.26[1]88.53[1]
KSCN (ai)-175.94[1]-190.56[1]246.9[1]-18.4[1]
KMnO4 (cr)-837.2[1]-737.6[1]171.71[1]117.57[1]
KMnO4 (ai)-793.8[1]-730.5[1]293.7[1]-60.2[1]
* (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
K2SO3 (cr)-1125.5[1]–––
K2SO3 (ai)-1140.1[1]-1053.1[1]176[1]–
K2CO3 (cr)-1151.02[1]-1063.5[1]155.52[1]114.43[1]
K2CO3 (ai)-1181.90[1]-1094.36[1]148.1[1]–
K2CO3 (cr)
1.5 hydrate
-1609.2[1]-1432.5[1]203.3[1]–
K2O (cr)-361.5[1]-322.1[2]94.1[2]83.7[2]
K2O (g)-63[1]–––
NO (g)90.25[1]86.55[1]210.761[1]29.844[1]
MnO2 (cr)-520.03[1]-465.14[1]53.05[1]54.14[1]
MnO2 (am)
precipitated
-502.5[1]–––
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas, (am):Amorphous solid

References

List of references

  1. 1
    Janiel J. Reed (1989)
    The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units
    National Institute of Standards and Technology (NIST)
    • 2
      James G. Speight (2017)
      Lange's Handbook of Chemistry, 17th edition
      McGraw Hill Education