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Mg(OH)2 + Cl2O7 → Mg(ClO4)2 + H2O

The reaction of magnesium hydroxide and dichlorine heptaoxide yields magnesium perchlorate 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 base and acidic oxide
BaseLewis base + Acidic oxideLewis acid + H2O
Oxoacid saltLewis conjugate + (H2O)

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
Mg(OH)2Magnesium hydroxide1
Lewis base
Base
Hydroxide base
Strong hydroxide base
Cl2O7Dichlorine heptaoxide1
Lewis acid
Acidic oxide
Strongly acidic oxide

Products

Chemical formulaNameCoefficientTypeType in general
equation
Mg(ClO4)2Magnesium perchlorate1
Lewis conjugate
Oxoacid salt
Salt of strong acid and strong base
H2OWater1
Water

Thermodynamic changes

Changes in standard condition (1)

Reaction of magnesium hydroxide and dichlorine heptaoxide
Mg(OH)2Crystalline solid + Cl2O7Liquid
Mg(ClO4)2Crystalline solid + H2OLiquid
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
−168.3
−168.3
−168.3
−168.3
per 1 mol of
−168.3

Changes in standard condition (2)

Reaction of magnesium hydroxide and dichlorine heptaoxide
Mg(OH)2Amorphous solidprecipitated + Cl2O7Liquid
Mg(ClO4)2Crystalline solid + H2OLiquid
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
−172.3
−172.3
−172.3
−172.3
per 1 mol of
−172.3

Changes in aqueous solution (1)

Reaction of magnesium hydroxide and dichlorine heptaoxide
Mg(OH)2Crystalline solid + Cl2O7Liquid
Mg(ClO4)2Ionized aqueous solution + H2OLiquid
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
−324.9
−324.9
−324.9
−324.9
per 1 mol of
−324.9

Changes in aqueous solution (2)

Reaction of magnesium hydroxide and dichlorine heptaoxide
Mg(OH)2Amorphous solidprecipitated + Cl2O7Liquid
Mg(ClO4)2Ionized aqueous solution + H2OLiquid
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
−328.9
−328.9
−328.9
−328.9
per 1 mol of
−328.9

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
Mg(OH)2 (cr)-924.54[1]-833.51[1]63.18[1]77.03[1]
Mg(OH)2 (am)
precipitated
-920.5[1]
Mg(OH)2 (g)-561[1]
Mg(OH)2 (ai)-926.84[1]-769.4[1]-159.4[1]
Cl2O7 (l)238.1[1]
Cl2O7 (g)272.0[1]
* (cr):Crystalline solid, (am):Amorphous solid, (g):Gas, (ai):Ionized aqueous solution, (l):Liquid

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
Mg(ClO4)2 (cr)-568.90[1]
Mg(ClO4)2 (ai)-725.51[1]-471.8[1]225.9[1]
Mg(ClO4)2 (cr)
2 hydrate
-1218.8[1]
Mg(ClO4)2 (cr)
4 hydrate
-1837.2[1]
Mg(ClO4)2 (cr)
6 hydrate
-2445.5[1]-1862.7[1]520.9[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, (ai):Ionized aqueous solution, (l):Liquid, (g):Gas

References

List of references

  1. 1