Heated charcoal burns intensively in contact with potassium nitrate
name: Charcoal is oxidized in contact with potassium nitrate
Wear eye protection and thermal protective gloves.
There is a serious fire risk - a fire extinguisher should be ready.
Make sure there is nothing flammable nearby.
Always follow general safety
recommendations. Please note that conducting chemistry
experiments you must comply with the relevant legal procedures in
2KNO3 -[T]→ 2KNO2 + O2
C + O2 → CO2
This experiment can be done in two ways.
The first way.
- Place potassium nitrate and charcoal powder into a trough.
- Heat the mixture with a match, or in a hot plate.
The second way.
- Place potassium nitrate into a test tube so that a large part of the tube remains unfilled.
- Heat the test tube with a burner.
- Heat a piece of charcoal by the same burner.
- When all of potassium nitrate has melted, put the piece of charcoal into the test tube.
Potassium nitrate decomposes under heating and produces oxygen. Oxygen supports combustion of the charcoal.