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2HCrO4 → H2O2 + 2CrO3 + 2e

Oxidation of hydrogenchromate ion
2HCrO4Hydrogenchromate ion
H2O2Hydrogen peroxide + 2CrO3Chromium(VI) oxide + 2eElectron

Oxidation of hydrogenchromate ion yields hydrogen peroxide, chromium(VI) 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

Oxidation of hydrogenchromate ion
2HCrO4Hydrogenchromate ion
H2O2Hydrogen peroxide + 2CrO3Chromium(VI) oxide + 2eElectron

General equation

Oxidation of oxidizable species
ReactantReducing agent
ProductOxidation product + e

Oxidation state of each atom

Oxidation of hydrogenchromate ion

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
HCrO4Hydrogenchromate ion2
Reducing

Products

Chemical formulaNameCoefficientTypeType in general
equation
H2O2Hydrogen peroxide1
Oxidized
CrO3Chromium(VI) oxide2
eElectron2
Electron

Thermodynamic changes

Changes in standard condition

Oxidation of hydrogenchromate ion
2HCrO4Un-ionized aqueous solution
H2O2Un-ionized aqueous solution + 2CrO3Crystalline solid + 2e
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
386.2
per 1 mol of
Hydrogenchromate ion
193.1
per 1 mol of
386.2
per 1 mol of
193.1
per 1 mol of
Electron
193.1

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
HCrO4 (ao)-878.2[1]-764.7[1]184.1[1]
* (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
H2O2 (l)-187.78[1]-120.35[1]109.6[1]89.1[1]
H2O2 (g)-136.31[1]-105.57[1]232.7[1]43.1[1]
H2O2 (ao)-191.17[1]-134.03[1]143.9[1]
CrO3 (cr)-589.5[1]
CrO3 (g)-385.8[1]
e
* (l):Liquid, (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid

References

List of references

  1. 1