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MgBr2 + 5KMnO4 + 14H+ → Mg(MnO4)2 + 2HBrO3 + 3Mn3+ + 5K+ + 6H2O

Reaction of magnesium bromide and potassium permanganate under acidic condition
MgBr2Magnesium bromide + 5KMnO4Potassium permanganate + 14H+Hydrogen ion
Mg(MnO4)2Magnesium permanganate + 2HBrO3Bromic acid + 3Mn3+Manganese(III) ion + 5K+Potassium ion + 6H2OWater

The reaction of magnesium bromide, potassium permanganate, and hydrogen ion yields magnesium permanganate, bromic acid, manganese(III) ion, potassium ion, 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 magnesium bromide and potassium permanganate under acidic condition
MgBr2Magnesium bromide + 5KMnO4Potassium permanganate + 14H+Hydrogen ion
Mg(MnO4)2Magnesium permanganate + 2HBrO3Bromic acid + 3Mn3+Manganese(III) ion + 5K+Potassium ion + 6H2OWater

General equation

Reaction of hardly oxidizable species and oxidizing species under acidic condition
Hardly oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent + H+Non-redox agent
ProductOxidation product + ProductReduction product + H2ONon-redox product

Oxidation state of each atom

Reaction of magnesium bromide and potassium permanganate under acidic condition

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
MgBr2Magnesium bromide1
Reducing
Hardly oxidizable
KMnO4Potassium permanganate5
Oxidizing
Oxidizing under acidic condition
H+Hydrogen ion14
Hydrogen ion

Products

Chemical formulaNameCoefficientTypeType in general
equation
Mg(MnO4)2Magnesium permanganate1
HBrO3Bromic acid2
Oxidized
Mn3+Manganese(III) ion3
Reduced
K+Potassium ion5
H2OWater6
Water

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
MgBr2 (cr)-524.3[1]-503.8[1]117.2[1]
MgBr2 (g)-309.6[1]
MgBr2 (ai)-709.94[1]-662.7[1]26.8[1]
MgBr2 (cr)
6 hydrate
-2410.0[1]-2055.7[1]397[1]
KMnO4 (cr)-837.2[1]-737.6[1]171.71[1]117.57[1]
KMnO4 (ai)-793.8[1]-730.5[1]293.7[1]-60.2[1]
H+ (g)1536.202[1]
H+ (ao)0[1]0[1]0[1]0[1]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution

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(MnO4)2
HBrO3 (ai)-67.07[1]18.60[1]161.71[1]
Mn3+ (g)5776.4[1]
K+ (g)514.26[1]
K+ (ao)-252.38[1]-283.27[1]102.5[1]21.8[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]
* (ai):Ionized aqueous solution, (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (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)