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4Cu2SO3 + 20e → 8Cu + 3S + SO32− + 9O2−

Reduction of copper(I) sulfite
4Cu2SO3Copper(I) sulfite + 20eElectron
8CuCopper + 3SSulfur + SO32−Sulfurous ion + 9O2−Oxide ion

Reduction of copper(I) sulfite yields copper, sulfur, sulfurous ion, and oxide ion (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

Reduction of copper(I) sulfite
4Cu2SO3Copper(I) sulfite + 20eElectron
8CuCopper + 3SSulfur + SO32−Sulfurous ion + 9O2−Oxide ion

General equation

Reduction of reducible species
ReactantOxidizing agent + e
ProductReduction product

Oxidation state of each atom

Reduction of copper(I) sulfite

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
Cu2SO3Copper(I) sulfite4
Oxidizing
eElectron20
Electron

Products

Chemical formulaNameCoefficientTypeType in general
equation
CuCopper8
Reduced
SSulfur3
Reduced
SO32−Sulfurous ion1
O2−Oxide ion9

Thermodynamic changes

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
Cu2SO3 (ai)-492.0[1]-386.6[1]50[1]
e
* (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
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]
S (cr)
rhombic
0[1]0[1]31.80[1]22.64[1]
S (cr)
monoclinic
0.33[1]
S (g)278.805[1]238.250[1]167.821[1]23.673[1]
SO32− (ao)-635.5[1]-486.5[1]-29[1]
O2−
* (cr):Crystalline solid, (g):Gas, (ao):Un-ionized aqueous solution

References

List of references

  1. 1