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6KI + 2Al(NO3)3 🔥→ 3KNO2 + 3KNO3 + 3I2 + Al2O3

The reaction of potassium iodide and aluminium nitrate yields potassium nitrite, potassium nitrate, iodine, and aluminium 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

General equation

Reaction of oxidizable species and oxidizing species
Oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
KIPotassium iodide6
Reducing
Oxidizable
Al(NO3)3Aluminium nitrate2
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
KNO2Potassium nitrite3
Reduced
KNO3Potassium nitrate3
I2Iodine3
Oxidized
Al2O3Aluminium oxide1

Thermodynamic changes

Changes in aqueous solution

Reaction of potassium iodide and aluminium nitrate
ΔrG−14 kJ/mol
K2.84 × 102
pK−2.45
6KIIonized aqueous solution + 2Al(NO3)3Ionized aqueous solution
🔥
3KNO2Ionized aqueous solution + 3KNO3Ionized aqueous solution + 3I2Un-ionized aqueous solution + Al2O3Crystalline solidα, corundum
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
98−14367.7
per 1 mol of
16−2.361.28
per 1 mol of
49−7.0183.8
per 1 mol of
33−4.7122.6
per 1 mol of
33−4.7122.6
per 1 mol of
33−4.7122.6
per 1 mol of
98−14367.7

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
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]
Al(NO3)3 (ai)-1155[1]-820[1]117.6[1]
Al(NO3)3 (cr)
6 hydrate
-2850.48[1]-2203.39[1]467.8[1]433.0[1]
Al(NO3)3 (cr)
9 hydrate
-3757.06[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
KNO2 (cr)
rhombic
-369.82[1]-306.55[1]152.09[1]107.40[1]
KNO2 (ai)-356.9[1]-315.4[1]225.5[1]
KNO3 (cr)-494.63[1]-394.86[1]133.05[1]96.40[1]
KNO3 (ai)-459.74[1]-394.53[1]248.9[1]-64.9[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]
Al2O3 (cr)
α, corundum
-1675.7[1]-1582.3[1]50.92[1]79.04[1]
Al2O3 (cr)
δ
-1666.5[1]
Al2O3 (cr)
ρ
-1657[1]
Al2O3 (cr)
κ
-1662.3[1]
Al2O3 (cr)
γ
-1656.9[1]
Al2O3 (am)-1632[1]
Al2O3 (cr)
1 hydrate
-1998.91[1]-1841.78[1]70.67[1]106.19[1]
Al2O3 (cr)
3 hydrate
-2576.5[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas, (ao):Un-ionized aqueous solution, (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)