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3Ca(HSO4)2 + Fe[Fe(CN)6] 💧→ 3CaSO4↓ + 6HCN + Fe2(SO4)3

The reaction of calcium hydrogensulfate and iron(III) hexacyanidoferrate(III) yields calcium sulfate, hydrogen cyanide, and iron(III) sulfate. 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 categories

Reaction data

Chemical equation

General equation

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
Ca(HSO4)2Calcium hydrogensulfate3
Lewis acid
Soluble in water
Fe[Fe(CN)6]Iron(III) hexacyanidoferrate(III)1
Lewis base
Soluble in water

Products

Chemical formulaNameCoefficientTypeType in general
equation
CaSO4Calcium sulfate3
Lewis conjugate
Slightly soluble in water
HCNHydrogen cyanide6
Non-redox product
Fe2(SO4)3Iron(III) sulfate1
Non-redox product

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
Ca(HSO4)2
Fe[Fe(CN)6]

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
CaSO4 (cr)
insoluble, anhydrite
-1434.11[1]-1321.79[1]106.7[1]99.66[1]
CaSO4 (cr)
soluble, α
-1425.24[1]-1313.42[1]108.4[1]100.21[1]
CaSO4 (cr)
soluble, β
-1420.80[1]-1308.98[1]108.4[1]99.04[1]
CaSO4 (ai)-1452.10[1]-1298.10[1]-33.1[1]
CaSO4 (cr)
0.5 hydrate
macrocrystalline, α
-1576.74[1]-1436.74[1]130.5[1]119.41[1]
CaSO4 (cr)
0.5 hydrate
microcrystalline, β
-1574.65[1]-1435.78[1]134.3[1]124.22[1]
CaSO4 (cr)
2 hydrate
selenite
-2022.63[1]-1797.28[1]194.1[1]186.02[1]
HCN (l)108.87[1]124.97[1]112.84[1]70.63[1]
HCN (g)135.1[1]124.7[1]201.78[1]35.86[1]
HCN (ai)150.6[1]172.4[1]94.1[1]
HCN (ao)107.1[1]119.7[1]124.7[1]
Fe2(SO4)3 (cr)-2581.5[1]
Fe2(SO4)3 (ai)-2825.0[1]-2242.8[1]-571.5[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (l):Liquid, (g):Gas, (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)