Permanganate Titration

a method in titrimetric chemical analysis that uses solutions of potassium permanganate (KMnO₄) for quantitative volumetric determinations. One advantage of permanganate titration is that a special indicator is not needed to establish the equivalence point, since KMnO₄ solution itself exhibits a characteristic violet-red color. In most cases, the titration of reducing agents [for example, Fe(II) and Mn(II), Mo(III) and Ti(III), , and H₂O₂] with a standard KMnO₄ solution is carried out in an acid medium, and the oxidation-reduction reaction proceeds according to the equation

Certain substances, for example, sulfites, sulfides, thiosulfates, and hydrazine, are oxidized more readily in neutral or alkaline mediums, in which case the reaction follows the pattern The concentration of the metals Ca, Mg, Zn, La, and Th is determined by combining permanganate titration and precipitation of the metal ions as oxalates.

REFERENCES

See references under OXIDIMETRY.

单词	permanganate titration
释义	Permanganate Titration Permanganate Titration a method in titrimetric chemical analysis that uses solutions of potassium permanganate (KMnO₄) for quantitative volumetric determinations. One advantage of permanganate titration is that a special indicator is not needed to establish the equivalence point, since KMnO₄ solution itself exhibits a characteristic violet-red color. In most cases, the titration of reducing agents [for example, Fe(II) and Mn(II), Mo(III) and Ti(III), , and H₂O₂] with a standard KMnO₄ solution is carried out in an acid medium, and the oxidation-reduction reaction proceeds according to the equation Certain substances, for example, sulfites, sulfides, thiosulfates, and hydrazine, are oxidized more readily in neutral or alkaline mediums, in which case the reaction follows the pattern The concentration of the metals Ca, Mg, Zn, La, and Th is determined by combining permanganate titration and precipitation of the metal ions as oxalates. REFERENCES See references under OXIDIMETRY.
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