What's the reaction between hydrogen peroxide and potassium permanganate?
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When hydrogen peroxide is mixed with potassium permanganate, oxygen gas and water vapour are formed, according to the reaction (source):
2MnO4−+3H2O2⟶2MnO2+2H2O+3O2+2OH−2MnOX4X−+3HX2OX2⟶2MnOX2+2HX2O+3OX2+2OHX−
This reaction is spontaneous, and exothermic. It is an example of a redox reaction, with the following half reactions occurring (data from Vanýsek):
MnO4−+2H2O+3e−⟶MnO2+4OH−(E∘red=0.595 V)MnOX4X−+2HX2O+3eX−⟶MnOX2+4OHX−(Ered∘=0.595 V)
H2O2⟶O2+2H++2e−(E∘ox=−0.695 V)
2MnO4−+3H2O2⟶2MnO2+2H2O+3O2+2OH−2MnOX4X−+3HX2OX2⟶2MnOX2+2HX2O+3OX2+2OHX−
This reaction is spontaneous, and exothermic. It is an example of a redox reaction, with the following half reactions occurring (data from Vanýsek):
MnO4−+2H2O+3e−⟶MnO2+4OH−(E∘red=0.595 V)MnOX4X−+2HX2O+3eX−⟶MnOX2+4OHX−(Ered∘=0.595 V)
H2O2⟶O2+2H++2e−(E∘ox=−0.695 V)
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