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5Fe + 4As2O5 → 5FeAsO4 + 3As

The reaction of iron and diarsenic pentaoxide yields iron(III) arsenate and arsenic (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

General equation

Reaction of reducing species and reducible species
Reducing speciesReducing agent + Reducible speciesOxidizing agent
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reaction of iron and diarsenic pentaoxide

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
FeIron5
Reducing
Reducing
As2O5Diarsenic pentaoxide4
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
FeAsO4Iron(III) arsenate5
Oxidized
AsArsenic3
Reduced

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
Fe (cr)0[1]0[1]27.28[1]25.10[1]
Fe (g)416.3[1]370.7[1]180.490[1]25.677[1]
As2O5 (cr)-924.87[1]-782.3[1]105.4[1]116.52[1]
As2O5 (aq)-951.4[1]
As2O5 (cr)
4 hydrate
-2104.6[1]
* (cr):Crystalline solid, (g):Gas, (aq):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
FeAsO4
As (cr)
α, gray, metallic
0[1]0[1]35.1[1]24.64[1]
As (cr)
γ, yellow, cubic
14.6[1]
As (am)
β
4.2[1]
As (g)302.5[1]261.0[1]174.21[1]20.786[1]
* (cr):Crystalline solid, (am):Amorphous solid, (g):Gas

References

List of references

  1. 1