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2HCl + Mn(OH)2 → MnCl2 + 2H2O

The reaction of hydrogen chloride and manganese(II) hydroxide yields manganese(II) chloride and water. 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

Reaction of acid and base
AcidBrønsted acid + BaseBrønsted base
SaltConjugate base + (H2O)(Conjugate acid)
Reaction of acid and hydroxide base
AcidBrønsted acid + Hydroxide baseBrønsted base
SaltConjugate base + H2OConjugate acid
Reaction of strong acid and weak base
Strong acidBrønsted acid + Weak baseBrønsted base
Salt of strong acid and weak baseConjugate base + (H2O)(Conjugate acid)

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
HClHydrogen chloride2
Brønsted acid
Acid
Strong acid
Mn(OH)2Manganese(II) hydroxide1
Brønsted base
Base
Hydroxide base
Weak base

Products

Chemical formulaNameCoefficientTypeType in general
equation
MnCl2Manganese(II) chloride1
Conjugate base
Salt
Salt of strong acid and weak base
H2OWater2
Conjugate acid
Water

Thermodynamic changes

Changes in standard condition

Reaction of hydrogen chloride and manganese(II) hydroxide
ΔrG−109.2 kJ/mol
K1.35 × 1019
pK−19.13
2HClGas + Mn(OH)2Amorphous solidprecipitated
MnCl2Crystalline solid + 2H2OLiquid
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
−172.9−109.2−215.0
per 1 mol of
−86.45−54.60−107.5
−172.9−109.2−215.0
−172.9−109.2−215.0
per 1 mol of
−86.45−54.60−107.5

Changes in aqueous solution (1)

Reaction of hydrogen chloride and manganese(II) hydroxide
ΔrG−87.6 kJ/mol
K2.22 × 1015
pK−15.35
2HClIonized aqueous solution + Mn(OH)2Amorphous solidprecipitated
MnCl2Ionized aqueous solution + 2H2OLiquid
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
−97.0−87.6−33.5
per 1 mol of
−48.5−43.8−16.8
−97.0−87.6−33.5
−97.0−87.6−33.5
per 1 mol of
−48.5−43.8−16.8

Changes in aqueous solution (2)

Reaction of hydrogen chloride and manganese(II) hydroxide
ΔrG−88.8 kJ/mol
K3.61 × 1015
pK−15.56
2HClIonized aqueous solution + Mn(OH)2Amorphous solidprecipitated
MnCl2Un-ionized aqueous solution + 2H2OLiquid
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
−88.8
per 1 mol of
−44.4
−88.8
−88.8
per 1 mol of
−44.4

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]
Mn(OH)2 (am)
precipitated
-695.4[1]-615.0[1]99.2[1]
* (g):Gas, (ai):Ionized aqueous solution, (am):Amorphous 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
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]
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]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (l):Liquid

References

List of references

  1. 1