Wholesale price of medical oxygen equipment in Henan

(1) Immediately put the burning red phosphorus into a gas container with a small amount of water, and the red phosphorus will continue to burn and produce a large amount of white smoke, which will be extinguished later; After the red phosphorus is quenched and cooled, open the spring clip. Because the oxygen in the gas container is consumed, the gas pressure in the bottle is reduced, so the water in the beaker enters the gas container along the conduit, and the volume of the water entering accounts for about one fifth of the air volume; Red phosphorus reacts with oxygen to produce phosphorus pentoxide.

Therefore, the answer is: red phosphorus continues to burn, producing a lot of white smoke; The water in the beaker enters the gas container, and the water level in the gas container rises, accounting for about15 of the air volume; 4P+5O2？ Light it? . ? 2P2O5？

(2) According to the main components of air are nitrogen and oxygen, it is known that the remaining gas in the bottle is mainly nitrogen. Excessive red phosphorus can not continue to burn in it), it can be inferred that nitrogen is insoluble in water and chemically inactive.

Therefore, the answer is: physical properties: colorless, insoluble in water; ? Chemical properties: Nitrogen does not react with red phosphorus.