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2KClO3 + Na2CrO4 💧→ K2CrO4↓ + 2NaClO3

The reaction of potassium chlorate and sodium chromate yields potassium chromate and sodium chlorate. 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
KClO3Potassium chlorate2
Lewis acid
Soluble in water
Na2CrO4Sodium chromate1
Lewis base
Very soluble in water

Products

Chemical formulaNameCoefficientTypeType in general
equation
K2CrO4Potassium chromate1
Lewis conjugate
Insoluble in water
NaClO3Sodium chlorate2
Non-redox product

Thermodynamic changes

Changes in standard condition

Reaction of potassium chlorate and sodium chromate
ΔrG7.2 kJ/mol
K0.55 × 10−1
pK1.26
2KClO3Crystalline solid + Na2CrO4Crystalline solid
💧
K2CrO4Crystalline solid + 2NaClO3Crystalline 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
2.47.2−15.9
per 1 mol of
1.23.6−7.95
per 1 mol of
2.47.2−15.9
per 1 mol of
2.47.2−15.9
per 1 mol of
1.23.6−7.95

Changes in aqueous solution

Reaction of potassium chlorate and sodium chromate
ΔrG0.04 kJ/mol
K0.98 × 100
pK0.01
2KClO3Ionized aqueous solution + Na2CrO4Ionized aqueous solution
💧
K2CrO4Ionized aqueous solution + 2NaClO3Ionized 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
0.000.040.0
per 1 mol of
0.000.02000.0
per 1 mol of
0.000.04000.0
per 1 mol of
0.000.04000.0
per 1 mol of
0.000.02000.0

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
KClO3 (cr)-397.73[1]-296.25[1]143.1[1]100.25[1]
KClO3 (ai)-356.35[1]-291.22[1]264.8[1]
Na2CrO4 (cr)-1342.2[1]-1234.93[1]176.61[1]142.13[1]
Na2CrO4 (ai)-1361.39[1]-1251.58[1]168.2[1]
Na2CrO4 (cr)
4 hydrate
-2528.8[1]
Na2CrO4 (cr)
10 hydrate
-4281.1[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
K2CrO4 (cr)-1403.7[1]-1295.7[1]200.12[1]145.98[1]
K2CrO4 (ai)-1385.91[1]-1294.30[1]255.2[1]
NaClO3 (cr)-365.774[1]-262.259[1]123.4[1]
NaClO3 (ai)-344.09[1]-269.84[1]221.3[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution

References

List of references

  1. 1