Why is hydrogen peroxide diluted with distilled water in a potassium permanganate titration?

23 September 2023 1 3K Report

Does diluting H2O2 with water not affect the titration result?

KMnO4 are used to analyze the concentration of hydrogen peroxide in a drugstore bottle. The high oxidising effect of potassium permanganate is employed to oxidise the analyte in manganometric redox titrations.The KMnO4 solution is purple in color, as it is added to the hydrogen peroxide solution, it reacts with the H2O2to produce colorless Mn2+, and thus the color will fade in the flask. The addition of distilled water calculated with standard colour on chart.

The reaction is, 2MnO4−+5H2O2+6H+→2Mn2++5O2+8H2O

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