Properties | More Info | Isotopes | Spectra
Compounds | Reactions | Production
Atomic: M.A.C. | Reference
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Reactions of Manganese
Reactions with water
Manganese does not react with water under normal conditions
Reactions with air
When finely divided, manganese metal burns in air. It burns in oxygen to form the oxide Mn3O4 and in nitrogen to form the nitride Mn3N2.
  3Mn(s) + 2O2(g)Mn3O4(s)
  3Mn(s) + N2(g)Mn3N2(s)
Reactions with halogens
Manganese burns in chlorine to form manganese(II) chloride.
  Mn(s) + Cl2(g)MnCl2(s)
Manganese burns in bromine to form manganese(II) bromide.
  Mn(s) + Br2(g)MnBr2(s)
Manganese burns in iodine to form manganese(II) iodide.
  Mn(s) + I2(g)MnI2(s)
The corresponding reaction between the metal and fluorine yields the manganese(II) fluoride and manganese(III) fluoride.
  Mn(s) + F2(g)MnF2(s)
  2Mn(s) + 3F2(g)2MnF3(s)
Reactions with acids
Manganese metal dissolves readily in dilute sulphuric acid to form solutions containing the aquated Mn(II) ion together with hydrogen gas.
  Mn(s) + H2SO4(aq)Mn2+(aq) + SO42-(aq) + H2(g)
 
Reduction Potentials
Balanced half-reaction E0 / V
MnIV + e-MnIII +1.65
MnIII + e-MnII +1.59
Mn3+ + e-Mn2+ +1.51
Mn2+ + 2e-Mn(s) -1.180
MnO4- + e-MnO42- +0.564
MnO4- + 2H2O + 3e-MnO2(s) + 4OH- +0.588
MnO4- + 4H+ + 3e-MnO2(s) (alpha) + 2H2O +1.695
MnO4- + 4H+ + 3e-MnO2(s) (beta) + 2H2O +1.679
MnO4- + 8H+ + 4e-Mn3+ + 4H2O +1.506
MnO4- + 8H+ + 5e-Mn2+ + 4H2O +1.51
MnO42- + 4H+ + 2e-MnO2(s) + 2H2O +2.257
MnO42- + 5H+ + 2e-HMnO2- + 2H2O +1.234
MnO42- + 2H2O + 2e-MnO2(s) + 4OH- +0.51
MnO2(s) + 4H+ + e-Mn3+ + 2H2O +0.948
MnO2(s) (alpha) + 4H+ + 2e-Mn2+ + 2H2O +1.23
MnO2(s) (beta) + 4H+ + 2e-Mn2+ + 2H2O +1.22
MnO2(s) (gamma) + 4H+ + 2e-Mn2+ + 2H2O +0.21
Mn(OH)3(s) + e-Mn(OH)2(s) + 2OH- +0.1
Mn(CN)63- + e-Mn(CN)64- -0.244
Mn(OH)2(s) + 2e-Mn(s) + 2OH- -1.55
HMnO2- + 3H+ + 2e-Mn(s) + 2H2O -0.163