Write the observation in the acrivity of adding potassium permanganate
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The synthesis of this compound is comprised of a few steps that demonstrate "redox" or reduction-oxidation reactions.
You need 7 grams of potassium nitrate, 1 gram of manganese dioxide, 2 grams of potassium hydroxide and a few milliliters of sodium bicarbonate.
Protective eye wear, a small glass vial, a 50 mililiter beaker, a small hammer, mortar and pestle and a ventilation hood are recommended.
Start the experiment outdoors or under a ventilated fume hood. Mix 7 grams of potassium nitrate and 1 gram of manganese dioxide in the vial. Using a torch, heat the vial gradually until the two chemicals melt together. Keep heat on the molten mixture for several minutes.
Add 2 grams of potassium hydroxide to the mixture and promptly re-heat the vial until a green boiling substance appears. Continue boiling mixture for 5 to 7 minutes. Take the torch off the boil and let the vial cool down.
After the mixture is a green solid, use the hammer to smash the substance into smaller pieces. Use the mortar and pestle to grind the pieces to a powder. Pour the powder into the beaker and dissolve in 50 mililiters of distilled water.
After the solution turns green, pour off the mixture that has risen to to top. Add the sodium bicarbonate in small increments while stirring steadily until the solution takes on a purple color. Adding too much sodium bicarbonate will result in a light pink color that signifies a destruction of permanganate.
You need 7 grams of potassium nitrate, 1 gram of manganese dioxide, 2 grams of potassium hydroxide and a few milliliters of sodium bicarbonate.
Protective eye wear, a small glass vial, a 50 mililiter beaker, a small hammer, mortar and pestle and a ventilation hood are recommended.
Start the experiment outdoors or under a ventilated fume hood. Mix 7 grams of potassium nitrate and 1 gram of manganese dioxide in the vial. Using a torch, heat the vial gradually until the two chemicals melt together. Keep heat on the molten mixture for several minutes.
Add 2 grams of potassium hydroxide to the mixture and promptly re-heat the vial until a green boiling substance appears. Continue boiling mixture for 5 to 7 minutes. Take the torch off the boil and let the vial cool down.
After the mixture is a green solid, use the hammer to smash the substance into smaller pieces. Use the mortar and pestle to grind the pieces to a powder. Pour the powder into the beaker and dissolve in 50 mililiters of distilled water.
After the solution turns green, pour off the mixture that has risen to to top. Add the sodium bicarbonate in small increments while stirring steadily until the solution takes on a purple color. Adding too much sodium bicarbonate will result in a light pink color that signifies a destruction of permanganate.
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