You-iggy

8Na2HPO4 + 15e → 8Na2O + 3P + 4H2O + 5PO43−

Reduction of sodium hydrogenphosphate
8Na2HPO4Sodium hydrogenphosphate + 15eElectron
8Na2OSodium oxide + 3PPhosphorus + 4H2OWater + 5PO43−Phosphate ion

Reduction of sodium hydrogenphosphate yields sodium oxide, phosphorus, water, and phosphate ion (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

Reduction of sodium hydrogenphosphate
8Na2HPO4Sodium hydrogenphosphate + 15eElectron
8Na2OSodium oxide + 3PPhosphorus + 4H2OWater + 5PO43−Phosphate ion

General equation

Reduction of reducible species
ReactantOxidizing agent + e
ProductReduction product

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
Na2HPO4Sodium hydrogenphosphate8
Oxidizing
eElectron15
Electron

Products

Chemical formulaNameCoefficientTypeType in general
equation
Na2OSodium oxide8
PPhosphorus3
Reduced
H2OWater4
PO43−Phosphate ion5

Thermodynamic changes

Changes in standard condition

Reduction of sodium hydrogenphosphate
ΔrG3858.1 kJ/mol
K0.12 × 10−675
pK675.91
8Na2HPO4Ionized aqueous solution + 15e
8Na2OCrystalline solid + 3PCrystalline solidwhite + 4H2OLiquid + 5PO43−Un-ionized aqueous solution
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
3335.03858.1−774.1
416.88482.26−96.76
per 1 mol of
Electron
222.33257.21−51.61
per 1 mol of
416.88482.26−96.76
per 1 mol of
1111.71286.0−258.0
per 1 mol of
833.75964.52−193.5
per 1 mol of
Phosphate ion
667.00771.62−154.8

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
Na2HPO4 (cr)-1748.1[1]-1608.2[1]150.50[1]135.31[1]
Na2HPO4 (ai)-1772.38[1]-1612.98[1]84.5[1]
Na2HPO4 (cr)
2 hydrate
-2346.0[1]-2088.5[1]221.3[1]
Na2HPO4 (cr)
7 hydrate
-3821.7[1]-3279.8[1]434.59[1]
Na2HPO4 (cr)
12 hydrate
-5297.8[1]-4467.8[1]633.83[1]
e
* (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
Na2O (cr)-414.22[1]-375.46[1]75.06[1]69.12[1]
Na2O (g)-35.6[1]-52.3[1]261.2[1]55.2[1]
P (cr)
white
0[1]0[1]41.09[1]23.84[1]
P (cr)
red, triclinic
-17.6[1]-12.1[1]22.80[1]21.21[1]
P (cr)
black
-39.3[1]
P (am)
red
-7.5[1]
P (g)314.64[1]278.25[1]163.193[1]20.786[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]
PO43− (ao)-1277.4[1]-1018.7[1]-220.3[1]
* (cr):Crystalline solid, (g):Gas, (am):Amorphous solid, (l):Liquid, (ao):Un-ionized aqueous solution

References

List of references

  1. 1
    Janiel J. Reed (1989)
    The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units
    National Institute of Standards and Technology (NIST)