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4Cu + K2SeO4 + 8H+ → 4Cu2+ + K2Se + 4H2O

Reaction of copper and potassium selenate under acidic condition
4CuCopper + K2SeO4Potassium selenate + 8H+Hydrogen ion
4Cu2+Copper(II) ion + K2SePotassium selenide + 4H2OWater

The reaction of copper, potassium selenate, and hydrogen ion yields copper(II) ion, potassium selenide, and water (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 potassium selenate under acidic condition
4CuCopper + K2SeO4Potassium selenate + 8H+Hydrogen ion
4Cu2+Copper(II) ion + K2SePotassium selenide + 4H2OWater

General equation

Reaction of oxidizable species and oxidizing species under acidic condition
Oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent + H+Non-redox agent
ProductOxidation product + ProductReduction product + H2ONon-redox product

Oxidation state of each atom

Reaction of copper and potassium selenate under acidic condition

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
CuCopper4
Reducing
Oxidizable
K2SeO4Potassium selenate1
Oxidizing
Oxidizing under acidic condition
H+Hydrogen ion8
Hydrogen ion

Products

Chemical formulaNameCoefficientTypeType in general
equation
Cu2+Copper(II) ion4
Oxidized
K2SePotassium selenide1
Reduced
H2OWater4
Water

Thermodynamic changes

Changes in standard condition

Reaction of copper and potassium selenate under acidic condition
ΔrG−115.9 kJ/mol
K2.02 × 1020
pK−20.30
4CuCrystalline solid + K2SeO4Ionized aqueous solution + 8H+Un-ionized aqueous solution
4Cu2+Un-ionized aqueous solution + K2SeIonized aqueous solution + 4H2OLiquid
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
−115.9
per 1 mol of
−28.98
per 1 mol of
−115.9
per 1 mol of
Hydrogen ion
−14.49
per 1 mol of
Copper(II) ion
−28.98
per 1 mol of
−115.9
per 1 mol of
−28.98

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]
K2SeO4 (cr)-1110.02[1]-1002.8[1]222[1]
K2SeO4 (ai)-1103.7[1]-1007.9[1]259.0[1]
H+ (g)1536.202[1]
H+ (ao)0[1]0[1]0[1]0[1]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-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
Cu2+ (g)3054.07[1]
Cu2+ (ao)64.77[1]65.49[1]-99.6[1]
K2Se (cr)-395.0[1]
K2Se (ai)-437.2[1]
K2Se (cr)
9 hydrate
-3087.0[1]
K2Se (cr)
14 hydrate
-4524.2[1]
K2Se (cr)
19 hydrate
-5991.9[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]
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (ai):Ionized aqueous solution, (l):Liquid

References

List of references

  1. 1