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2H2S + 3HgSO4 ๐Ÿ”ฅโ†’ 2H2SO3 + 3SO2 + 3Hg

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Reaction of hydrogen sulfide and mercury(II) sulfate
2H2SHydrogen sulfide + 3HgSO4Mercury(II) sulfate
๐Ÿ”ฅ
โŸถ
2H2SO3Sulfurous acid + 3SO2Sulfur dioxide + 3HgMercury

The reaction of hydrogen sulfide and mercury(II) sulfate yields sulfurous acid, sulfur dioxide, and mercury (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

Reaction of hydrogen sulfide and mercury(II) sulfate
2H2SHydrogen sulfide + 3HgSO4Mercury(II) sulfate
๐Ÿ”ฅ
โŸถ
2H2SO3Sulfurous acid + 3SO2Sulfur dioxide + 3HgMercury

General equation

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

Oxidation state of each atom

Reaction of hydrogen sulfide and mercury(II) sulfate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
H2SHydrogen sulfide2
Reducing
Reducing
HgSO4Mercury(II) sulfate3
Oxidizing
Reducible

Products

Chemical formulaNameCoefficientTypeType in general
equation
H2SO3Sulfurous acid2
Oxidized
โ€“
SO2Sulfur dioxide3
Reduced
โ€“
HgMercury3
Reduced
โ€“

Thermodynamic changes

Changes in standard condition (1)

Reaction of hydrogen sulfide and mercury(II) sulfate
โ—†
ฮ”rGโˆ’38.0 kJ/mol
K4.54 ร— 106
pKโˆ’6.66
2H2SUn-ionized aqueous solution + 3HgSO4Un-ionized aqueous solution
๐Ÿ”ฅ
โŸถ
2H2SO3Un-ionized aqueous solution + 3SO2Gas + 3HgUn-ionized aqueous solution
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
โ€“โˆ’38.0โ€“โ€“
per 1 mol of
โ€“โˆ’19.0โ€“โ€“
โ€“โˆ’12.7โ€“โ€“
per 1 mol of
โ€“โˆ’19.0โ€“โ€“
per 1 mol of
โ€“โˆ’12.7โ€“โ€“
per 1 mol of
โ€“โˆ’12.7โ€“โ€“

Changes in standard condition (2)

Reaction of hydrogen sulfide and mercury(II) sulfate
โ—†
ฮ”rGโˆ’39.5 kJ/mol
K8.32 ร— 106
pKโˆ’6.92
2H2SUn-ionized aqueous solution + 3HgSO4Un-ionized aqueous solution
๐Ÿ”ฅ
โŸถ
2H2SO3Un-ionized aqueous solution + 3SO2Un-ionized aqueous solution + 3HgUn-ionized aqueous solution
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
โ€“โˆ’39.5โ€“โ€“
per 1 mol of
โ€“โˆ’19.8โ€“โ€“
โ€“โˆ’13.2โ€“โ€“
per 1 mol of
โ€“โˆ’19.8โ€“โ€“
per 1 mol of
โ€“โˆ’13.2โ€“โ€“
per 1 mol of
โ€“โˆ’13.2โ€“โ€“

Thermodynamic data of reactants

Chemical formulaStandard enthalpy
of formation
ฮ”fHยฐ
kJ ยท molโˆ’1		Standard Gibbs
energy of
formation
ฮ”fGยฐ
kJ ยท molโˆ’1		Standard
molar entropy
Sยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard molar
heat capacity at
constant pressure
Cpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
H2S (g)-20.63[1]-33.56[1]205.79[1]34.23[1]
H2S (ao)-39.7[1]-27.83[1]121[1]โ€“
HgSO4 (cr)-707.5[1]โ€“โ€“โ€“
HgSO4 (ao)โ€“-588.2[1]โ€“โ€“
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid

Thermodynamic data of products

Chemical formulaStandard enthalpy
of formation
ฮ”fHยฐ
kJ ยท molโˆ’1		Standard Gibbs
energy of
formation
ฮ”fGยฐ
kJ ยท molโˆ’1		Standard
molar entropy
Sยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard molar
heat capacity at
constant pressure
Cpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
H2SO3 (ao)-608.81[1]-537.81[1]232.2[1]โ€“
SO2 (l)-320.5[1]โ€“โ€“โ€“
SO2 (g)-296.830[1]-300.194[1]248.22[1]39.87[1]
SO2 (ao)-322.980[1]-300.676[1]161.9[1]โ€“
Hg (cr)โ€“โ€“โ€“โ€“
Hg (l)0[1]0[1]76.02[1]27.983[1]
Hg (g)61.317[1]31.820[1]174.96[1]20.786[1]
Hg (ao)37.7[1]39.3[1]71[1]โ€“
* (ao):Un-ionized aqueous solution, (l):Liquid, (g):Gas, (cr):Crystalline solid

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)