Potassium Permanganate Experiments

Potassium Permanganate Experiments

By | January 20, 2017

Potassium permanganate is a strong oxidizing agent. . The standard industrial use of this compound in water treatment for color removal, taste and odor, and removal of iron and manganese. Potassium permanganate also inactivate certain viruses and bacteria. When combined with organic matter reaction is explosive, and leaves behind a permanganate residues.

Oxidation of glycerin of potassium permanganate
This experiment shows an exothermic release of energy in form of heat from the subsequent reaction. The reaction involves the oxidation of glycerin by potassium permanganate. Glycerin is an organic compound, and an easily oxidized substance.


You need about 20 grams of potassium permanganate powder, 3 to 5 ml of glycerin and a pipette. You also need a clean 70 milliliter beaker, glass tamping rod or test tube, and protective glasses.


In a well-ventilated area, scoop that potassium permanganate in the cup. Creating an impression of stamping material with test tubes or glass rod.


Use pipette, quickly but gently dropping glycerin into impression. As glycerin oxidized, gives it a bright flame as a result of an exothermic reaction.

Potassium Diffusion in water
This experiment demonstrates the principle of chemical diffusion using potassium permanganate in water.


You need to clean 70 milliliter beaker and a few potassium permanganate crystals.


Place the crystals in the bottom of the beaker. Constantly add distilled water in the beaker up to 35 mL or so of volume. Due to the random motion of potassium permanganate particles, a dense purple solution form in water at the bottom of the beaker. The purple solution will slowly spread to the rest of the water throughout the cup to create a less dense, but uniformly colored purple solution.

Making potassium permanganate
The synthesis of this compound consists of a few steps that show “redox” or reduction-oxidation reactions.


You need 7 grams of potassium nitrate, 1 g of manganese dioxide, 2 grams of potassium hydroxide and a few milliliters of sodium bicarbonate.


goggles, a small glass vial, 50 mililiter beaker, a small hammer, mortar and a fume hood is recommended.


Start experiment outdoors or under a ventilated fume cupboard. Mix 7 grams of potassium nitrate and 1 gram of manganese dioxide in the vial. Using a flashlight, warm the vial gradually up to two chemicals merge. Keep the heat on the molten mixture for several minutes.


Add 2 grams of potassium hydroxide to the mixture and quickly re-warm the vial to a green boiling substance appears. Continue boiling the mixture for 5 to 7 minutes. Taking the torch off the boil and let the glass cool down.


After the mixture is a green solid, use the hammer to smash the drug into smaller pieces. Use mortar to grind the pieces into a powder. Pour the powder in the beaker and dissolved in 50 mililiters of distilled water.


After the solution turns green, pour the mixture that has risen to the top. Add sodium bicarbonate in small increments, stirring steadily until the solution takes on a purple color. Adding too much sodium bicarbonate resulting in a light pink color which means the destruction of permanganate.

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