Precautions for making oxygen from potassium permanganate

Experimental steps and precautions for potassium permanganate oxygen production: 1. Assemble the experimental device (the guide in the test can extend the rubber plug, which is convenient for gas export), and check the air tightness of the device. 2. Lay the drug flat at the bottom of the test, put a small ball of cotton in the mouth (to prevent the hot oxygen flow from blowing potassium permanganate powder into the guide), and plug the test mouth with a single hole rubber plug with a guide. 3, the test is fixed on the iron bench test port should be slightly inclined downward, to prevent the wet water stored in the drug after heating into steam, to the mouth into cold water back to the bottom of the test, so that the test burst; The iron clamp should be clamped in the middle and upper part of the test, that is, about 1/3 from the mouth. 4. Light the alcohol lamp and heat the test. 5. After collection, remove the guide from the water. 6. Turn off the alcohol lamp and stop heating. Extended data: Potassium permanganate is one of the strongest oxidants, as an oxidant is greatly affected by pH, and has the strongest oxidation capacity in acidic solutions. The corresponding acids HMnO4 permanganate and Mn2O7 acid anhydride are strong oxidants, which can automatically decompose and heat, and cause combustion in contact with organic matter. Potassium permanganate has a strong oxidizing ability, which is commonly used as an oxidizing agent in laboratory and industry. In acidic media, it is slowly decomposed into manganese dioxide, potassium salts and oxygen. Light catalyzes this decomposition, so it is often stored in brown bottles in the laboratory. It can be seen from the elemental potential diagram and the oxidation state diagram of free energy that it has a strong oxidizing property. In alkaline solutions, its oxidation is not as strong as in acidic solutions. When used as oxidant, the reduction products vary according to the acidity and alkalinity of the medium. Reference source: Encyclopedia - Potassium permanganate