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6(NH4)2CrO4 → 2N2H5+ + 3HCr2O7 + 3OH + 8NH4+ + 4e

Oxidation of ammonium chromate
6(NH4)2CrO4Ammonium chromate
2N2H5+Hydrazinium ion + 3HCr2O7Hydrogendichromate ion + 3OHHydroxide ion + 8NH4+Ammonium ion + 4eElectron

Oxidation of ammonium chromate yields hydrazinium ion, hydrogendichromate ion, hydroxide ion, ammonium ion. 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 categories

Reaction data

Chemical equation

Oxidation of ammonium chromate
6(NH4)2CrO4Ammonium chromate
2N2H5+Hydrazinium ion + 3HCr2O7Hydrogendichromate ion + 3OHHydroxide ion + 8NH4+Ammonium ion + 4eElectron

General equation

Oxidation of oxidizable species
ReactantReducing agent
ProductOxidation product + e

Oxidation state of each atom

Oxidation of ammonium chromate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
(NH4)2CrO4Ammonium chromate6
Reducing

Products

Chemical formulaNameCoefficientTypeType in general
equation
N2H5+Hydrazinium ion2
Oxidized
HCr2O7Hydrogendichromate ion3
OHHydroxide ion3
NH4+Ammonium ion8
eElectron4
Electron

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
(NH4)2CrO4 (cr)-1167.3[1]
(NH4)2CrO4 (ai)-1146.16[1]-886.36[1]277.0[1]
* (cr):Crystalline solid, (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
N2H5+ (ao)-7.5[1]82.5[1]151[1]70.3[1]
HCr2O7
OH (g)-143.5[1]
OH (ao)-229.994[1]-157.244[1]-10.75[1]-148.5[1]
NH4+ (ao)-132.51[1]-79.31[1]113.4[1]79.9[1]
e
* (ao):Un-ionized aqueous solution, (g):Gas

References

List of references

  1. 1