Potassium permanganate titration

Potassium permanganate titration

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This image is part of the sequence Science and technology: Potassium permanganate titration

Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: Potassium permanganate titration. Here, as purple potassium permanganate is added to clear oxalic acid the reaction has slowed down and the solution has turned brown. Warming the solution to 85 degrees Celsius or adding sulphuric acid, will avoid this problem. The reaction will speed up and the solution will clear again.

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Keywords: brown, chemical, chemistry, conical flask, erlenmeyer flask, experiment, glassware, no-one, nobody, oxalic acid, potassium permanganate, reaction, redox, school science, science education, solution, still life, still-life, titration, white background

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