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BaI2 + K2CO3 💧→ BaCO3↓ + 2KI

The reaction of barium iodide and potassium carbonate yields barium carbonate and potassium iodide. This reaction is an acid-base reaction and is classified as follows:

Table of contents
  1. 1Reaction data
  2. 2Thermodynamic changes
  3. 3References
  4. 4Related categories

Reaction data

Chemical equation

General equation

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
BaI2Barium iodide1
Lewis acid
Very soluble in water
K2CO3Potassium carbonate1
Lewis base
Very soluble in water

Products

Chemical formulaNameCoefficientTypeType in general
equation
BaCO3Barium carbonate1
Lewis conjugate
Insoluble in water
KIPotassium iodide2
Non-redox product

Thermodynamic changes

Changes in standard condition

Reaction of barium iodide and potassium carbonate
BaI2Crystalline solid + K2CO3Crystalline solid
💧
BaCO3Crystalline solid + 2KICrystalline 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
−119.0
per 1 mol of
−119.0
−119.0
per 1 mol of
−119.0
per 1 mol of
−59.50

Changes in aqueous solution

Reaction of barium iodide and potassium carbonate
ΔrG−49.0 kJ/mol
K3.84 × 108
pK−8.58
BaI2Ionized aqueous solution + K2CO3Ionized aqueous solution
💧
BaCO3Crystalline solid + 2KIIonized 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
−1.5−49.0159.4
per 1 mol of
−1.5−49.0159.4
−1.5−49.0159.4
per 1 mol of
−1.5−49.0159.4
per 1 mol of
−0.75−24.579.70

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
BaI2 (cr)-602.1[1]
BaI2 (g)-326[1]-377[1]343[1]61.5[1]
BaI2 (ai)-648.02[1]-663.92[1]232.2[1]
BaI2 (cr)
1 hydrate
-919.2[1]
BaI2 (cr)
2 hydrate
-1216.7[1]
BaI2 (cr)
2.5 hydrate
-1363.6[1]
BaI2 (cr)
7 hydrate
-2676.5[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]
* (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
BaCO3 (cr)-1216.3[1]-1137.6[1]112.1[1]85.35[1]
BaCO3 (ai)-1214.78[1]-1088.59[1]-47.3[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]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas

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)