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2H+ + CrO42− → CrO3 + H2O

Reaction of hydrogen ion and chromate ion
2H+Hydrogen ion + CrO42−Chromate ion
CrO3Chromium(VI) oxide + H2OWater

The reaction of hydrogen ion and chromate ion yields chromium(VI) oxide and water (Other reactions are here). 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 reactions
  5. 5Related categories

Reaction data

Chemical equation

Reaction of hydrogen ion and chromate ion
2H+Hydrogen ion + CrO42−Chromate ion
CrO3Chromium(VI) oxide + H2OWater

General equation

Reaction of cation and anion
CationLewis acid + AnionLewis base
ProductLewis conjugate + (H2O)

Oxidation state of each atom

Reaction of hydrogen ion and chromate ion

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
H+Hydrogen ion2
Lewis acid
Cation
CrO42−Chromate ion1
Lewis base
Anion

Products

Chemical formulaNameCoefficientTypeType in general
equation
CrO3Chromium(VI) oxide1
Lewis conjugate
H2OWater1
Water

Thermodynamic changes

Changes in standard condition

Reaction of hydrogen ion and chromate ion
2H+Un-ionized aqueous solution + CrO42−Un-ionized aqueous solution
CrO3Crystalline solid + H2OLiquid
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
5.8
per 1 mol of
Hydrogen ion
2.9
per 1 mol of
Chromate ion
5.8
per 1 mol of
5.8
per 1 mol of
5.8

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
H+ (g)1536.202[1]
H+ (ao)0[1]0[1]0[1]0[1]
CrO42− (ao)-881.15[1]-727.75[1]50.21[1]
* (g):Gas, (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
CrO3 (cr)-589.5[1]
CrO3 (g)-385.8[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]
* (cr):Crystalline solid, (g):Gas, (l):Liquid

References

List of references

  1. 1