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Cu2SO3 + 2H2O → 2CuOH + H2SO3

The reaction of copper(I) sulfite and water yields copper(I) hydroxide and sulfurous acid. 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

Hydrolysis of salt
Salt of weak acid and weak baseBrønsted base + H2OBrønsted acid
Base/Basic saltConjugate base + Acid/Acid salt/HydrideConjugate acid

Oxidation state of each atom

Hydrolysis of copper(I) sulfite

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
Cu2SO3Copper(I) sulfite1
Brønsted base
Salt of weak acid and weak base
H2OWater2
Brønsted acid
Water

Products

Chemical formulaNameCoefficientTypeType in general
equation
CuOHCopper(I) hydroxide2
Conjugate base
Base
H2SO3Sulfurous acid1
Conjugate acid
Acid

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]
H2O (cr)
H2O (l)-285.830[1]-237.129[1]69.91[1]75.291[1]
H2O (g)-241.818[1]-228.572[1]188.825[1]33.577[1]
* (ai):Ionized aqueous solution, (cr):Crystalline solid, (l):Liquid, (g):Gas

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
CuOH
H2SO3 (ao)-608.81[1]-537.81[1]232.2[1]
* (ao):Un-ionized aqueous solution

References

List of references

  1. 1