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  3. 8KI + SrSO4 🔥→ K2S + 3K2O + 4I2 + SrO

8KI + SrSO4 🔥→ K2S + 3K2O + 4I2 + SrO

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Reaction of potassium iodide and strontium sulfate
8KIPotassium iodide + SrSO4Strontium sulfate
🔥
⟶
K2SPotassium sulfide + 3K2OPotassium oxide + 4I2Iodine + SrOStrontium oxide

The reaction of potassium iodide and strontium sulfate yields potassium sulfide, potassium oxide, iodine, and strontium 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 iodide and strontium sulfate
8KIPotassium iodide + SrSO4Strontium sulfate
🔥
⟶
K2SPotassium sulfide + 3K2OPotassium oxide + 4I2Iodine + SrOStrontium oxide

General equation

Reaction of oxidizable species and reducible species
Oxidizable speciesReducing agent + Reducible speciesOxidizing agent
🔥
⟶
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reaction of potassium iodide and strontium sulfate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
KIPotassium iodide8
Reducing
Oxidizable
SrSO4Strontium sulfate1
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
K2SPotassium sulfide1
Reduced
–
K2OPotassium oxide3
–
–
I2Iodine4
Oxidized
–
SrOStrontium oxide1
–
–

Thermodynamic changes

Changes in standard condition (1)

Reaction of potassium iodide and strontium sulfate
◆
ΔrG2047.8 kJ/mol
K0.17 × 10−358
pK358.76
8KICrystalline solid + SrSO4Crystalline solid
🔥
⟶
K2SCrystalline solid + 3K2OCrystalline solid + 4I2Crystalline solid + SrOCrystalline 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
2019.12047.8−61–
per 1 mol of
252.39255.97−7.6–
per 1 mol of
2019.12047.8−61–
per 1 mol of
2019.12047.8−61–
per 1 mol of
673.03682.60−20–
per 1 mol of
504.77511.95−15–
per 1 mol of
2019.12047.8−61–

Changes in standard condition (2)

Reaction of potassium iodide and strontium sulfate
8KICrystalline solid + SrSO4Crystalline solidprecipitated
🔥
⟶
K2SCrystalline solid + 3K2OCrystalline solid + 4I2Crystalline solid + SrOCrystalline 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
2015.8–––
per 1 mol of
251.97–––
per 1 mol of
2015.8–––
per 1 mol of
2015.8–––
per 1 mol of
671.93–––
per 1 mol of
503.95–––
per 1 mol of
2015.8–––

Changes in aqueous solution (1)

Reaction of potassium iodide and strontium sulfate
◆
ΔrG2076.4 kJ/mol
K0.17 × 10−363
pK363.77
8KIIonized aqueous solution + SrSO4Crystalline solid
🔥
⟶
K2SIonized aqueous solution + 3K2OCrystalline solid + 4I2Un-ionized aqueous solution + SrOCrystalline 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
1856.12076.4−752–
per 1 mol of
232.01259.55−94.0–
per 1 mol of
1856.12076.4−752–
per 1 mol of
1856.12076.4−752–
per 1 mol of
618.70692.13−251–
per 1 mol of
464.02519.10−188–
per 1 mol of
1856.12076.4−752–

Changes in aqueous solution (2)

Reaction of potassium iodide and strontium sulfate
8KIIonized aqueous solution + SrSO4Crystalline solidprecipitated
🔥
⟶
K2SIonized aqueous solution + 3K2OCrystalline solid + 4I2Un-ionized aqueous solution + SrOCrystalline 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
1852.8–––
per 1 mol of
231.60–––
per 1 mol of
1852.8–––
per 1 mol of
1852.8–––
per 1 mol of
617.60–––
per 1 mol of
463.20–––
per 1 mol of
1852.8–––

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
KI (cr)-327.900[1]-324.892[1]106.32[1]52.93[1]
KI (g)-125.5[1]-166.1[1]258.3[1]37.11[1]
KI (ai)-307.57[1]-334.85[1]213.8[1]-120.5[1]
SrSO4 (cr)-1453.1[1]-1340.9[1]117[1]–
SrSO4 (cr)
precipitated
-1449.8[1]–––
SrSO4 (ai)-1455.07[1]-1304.00[1]-12.6[1]–
* (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
K2S (cr)-380.7[1]-364.0[1]105[1]–
K2S (ai)-471.5[1]-480.7[1]190.4[1]–
K2S (cr)
2 hydrate
-975.3[1]–––
K2S (cr)
5 hydrate
-1871.5[1]–––
K2O (cr)-361.5[1]-322.1[2]94.1[2]83.7[2]
K2O (g)-63[1]–––
I2 (cr)0[1]0[1]116.135[1]54.438[1]
I2 (g)62.438[1]19.327[1]260.69[1]36.90[1]
I2 (ao)22.6[1]16.40[1]137.2[1]–
SrO (cr)-592.0[1]-561.9[1]54.4[1]45.02[1]
SrO (g)-8[1]–––
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas, (ao):Un-ionized aqueous solution

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