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5Cu + 2NaIO3 → 5CuO + I2 + Na2O

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Reaction of copper and sodium iodate
5CuCopper + 2NaIO3Sodium iodate
⟶
5CuOCopper(II) oxide + I2Iodine + Na2OSodium oxide

The reaction of copper and sodium iodate yields copper(II) oxide, iodine, and sodium 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 copper and sodium iodate
5CuCopper + 2NaIO3Sodium iodate
⟶
5CuOCopper(II) oxide + I2Iodine + Na2OSodium oxide

General equation

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

Oxidation state of each atom

Reaction of copper and sodium iodate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
CuCopper5
Reducing
Oxidizable
NaIO3Sodium iodate2
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
CuOCopper(II) oxide5
Oxidized
–
I2Iodine1
Reduced
–
Na2OSodium oxide1
–
–

Thermodynamic changes

Changes in standard condition

Reaction of copper and sodium iodate
5CuCrystalline solid + 2NaIO3Crystalline solid
⟶
5CuOCrystalline solid + I2Crystalline solid + Na2OCrystalline 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
−237.1––28.9
per 1 mol of
−47.42––5.78
per 1 mol of
−118.5––14.4
per 1 mol of
−47.42––5.78
per 1 mol of
−237.1––28.9
per 1 mol of
−237.1––28.9

Changes in aqueous solution

Reaction of copper and sodium iodate
◆
ΔrG−227.8 kJ/mol
K8.11 × 1039
pK−39.91
5CuCrystalline solid + 2NaIO3Ionized aqueous solution
⟶
5CuOCrystalline solid + I2Un-ionized aqueous solution + Na2OCrystalline 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
−255.1−227.8−95.1–
per 1 mol of
−51.02−45.56−19.0–
per 1 mol of
−127.5−113.9−47.5–
per 1 mol of
−51.02−45.56−19.0–
per 1 mol of
−255.1−227.8−95.1–
per 1 mol of
−255.1−227.8−95.1–

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
Cu (cr)0[1]0[1]33.150[1]24.435[1]
Cu (g)338.32[1]298.58[1]166.38[1]20.786[1]
NaIO3 (cr)-481.788[1]––92.0[1]
NaIO3 (ai)-461.5[1]-389.9[1]177.4[1]–
NaIO3 (cr)
1 hydrate
-779.48[1]-634.03[1]162.3[1]–
NaIO3 (cr)
5 hydrate
-1952.25[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
CuO (cr)-157.3[1]-129.7[1]42.63[1]42.30[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]–
Na2O (cr)-414.22[1]-375.46[1]75.06[1]69.12[1]
Na2O (g)-35.6[1]-52.3[1]261.2[1]55.2[1]
* (cr):Crystalline solid, (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)