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8HCl + Na2MnO4 → 2Cl2 + MnCl2 + 2NaCl + 4H2O

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Reaction of hydrogen chloride and sodium manganate
8HClHydrogen chloride + Na2MnO4Sodium manganate
⟶
2Cl2Chlorine + MnCl2Manganese(II) chloride + 2NaClSodium chloride + 4H2OWater

The reaction of hydrogen chloride and sodium manganate yields chlorine, manganese(II) chloride, sodium chloride, and water (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 chloride and sodium manganate
8HClHydrogen chloride + Na2MnO4Sodium manganate
⟶
2Cl2Chlorine + MnCl2Manganese(II) chloride + 2NaClSodium chloride + 4H2OWater

General equation

Reaction of hardly oxidizable species and oxidizing species
Hardly oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent
⟶
ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reaction of hydrogen chloride and sodium manganate

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
HClHydrogen chloride8
Reducing
Hardly oxidizable
Na2MnO4Sodium manganate1
Oxidizing
Oxidizing

Products

Chemical formulaNameCoefficientTypeType in general
equation
Cl2Chlorine2
Oxidized
–
MnCl2Manganese(II) chloride1
Reduced
–
NaClSodium chloride2
–
–
H2OWater4
–
–

Thermodynamic changes

Changes in standard condition

Reaction of hydrogen chloride and sodium manganate
8HClGas + Na2MnO4Crystalline solid
⟶
2Cl2Gas + MnCl2Crystalline solid + 2NaClCrystalline solid + 4H2OLiquid
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
−552.5–––
per 1 mol of
−69.06–––
per 1 mol of
−552.5–––
per 1 mol of
−276.3–––
−552.5–––
per 1 mol of
−276.3–––
per 1 mol of
−138.1–––

Changes in aqueous solution (1)

Reaction of hydrogen chloride and sodium manganate
◆
ΔrG−151.2 kJ/mol
K3.08 × 1026
pK−26.49
8HClIonized aqueous solution + Na2MnO4Ionized aqueous solution
⟶
2Cl2Gas + MnCl2Ionized aqueous solution + 2NaClIonized aqueous solution + 4H2OLiquid
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
−42−151.2368–
per 1 mol of
−5.3−18.9046.0–
per 1 mol of
−42−151.2368–
per 1 mol of
−21−75.60184–
−42−151.2368–
per 1 mol of
−21−75.60184–
per 1 mol of
−11−37.8092.0–

Changes in aqueous solution (2)

Reaction of hydrogen chloride and sodium manganate
◆
ΔrG−152.4 kJ/mol
K5.00 × 1026
pK−26.70
8HClIonized aqueous solution + Na2MnO4Ionized aqueous solution
⟶
2Cl2Gas + MnCl2Un-ionized aqueous solution + 2NaClIonized aqueous solution + 4H2OLiquid
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
–−152.4––
per 1 mol of
–−19.05––
per 1 mol of
–−152.4––
per 1 mol of
–−76.20––
–−152.4––
per 1 mol of
–−76.20––
per 1 mol of
–−38.10––

Changes in aqueous solution (3)

Reaction of hydrogen chloride and sodium manganate
◆
ΔrG−137.3 kJ/mol
K1.13 × 1024
pK−24.05
8HClIonized aqueous solution + Na2MnO4Ionized aqueous solution
⟶
2Cl2Un-ionized aqueous solution + MnCl2Ionized aqueous solution + 2NaClIonized aqueous solution + 4H2OLiquid
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
−88−137.3164–
per 1 mol of
−11−17.1620.5–
per 1 mol of
−88−137.3164–
per 1 mol of
−44−68.6582.0–
−88−137.3164–
per 1 mol of
−44−68.6582.0–
per 1 mol of
−22−34.3341.0–

Changes in aqueous solution (4)

Reaction of hydrogen chloride and sodium manganate
◆
ΔrG−138.5 kJ/mol
K1.84 × 1024
pK−24.26
8HClIonized aqueous solution + Na2MnO4Ionized aqueous solution
⟶
2Cl2Un-ionized aqueous solution + MnCl2Un-ionized aqueous solution + 2NaClIonized aqueous solution + 4H2OLiquid
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
–−138.5––
per 1 mol of
–−17.31––
per 1 mol of
–−138.5––
per 1 mol of
–−69.25––
–−138.5––
per 1 mol of
–−69.25––
per 1 mol of
–−34.63––

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
HCl (g)-92.307[1]-95.299[1]186.908[1]29.12[1]
HCl (ai)-167.159[1]-131.228[1]56.5[1]-136.4[1]
Na2MnO4 (cr)-1156.0[1]–––
Na2MnO4 (ai)-1134[1]-1024.6[1]176[1]–
* (g):Gas, (ai):Ionized aqueous solution, (cr):Crystalline solid

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
Cl2 (g)0[1]0[1]223.066[1]33.907[1]
Cl2 (ao)-23.4[1]6.94[1]121[1]–
MnCl2 (cr)-481.29[1]-440.50[1]118.24[1]72.93[1]
MnCl2 (g)-263.6[1]–––
MnCl2 (ai)-555.05[1]-490.8[1]38.9[1]-222[1]
MnCl2 (ao)–-492.0[1]––
MnCl2 (cr)
1 hydrate
-789.9[1]-696.1[1]174.1[1]–
MnCl2 (cr)
2 hydrate
-1092.0[1]-942.1[1]218.8[1]–
MnCl2 (cr)
4 hydrate
-1687.4[1]-1423.6[1]303.3[1]–
NaCl (cr)-411.153[1]-384.138[1]72.13[1]50.50[1]
NaCl (g)-176.65[1]-196.66[1]229.81[1]35.77[1]
NaCl (ai)-407.27[1]-393.133[1]115.5[1]-90.0[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]
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (ai):Ionized aqueous solution, (l):Liquid

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)