Put a small candle used in the water cup and ignite. Put a tea sodium bicarbonate in the second cup and eat a little vinegar. White powder began to bubble, indicating that it is producing a gas. Gently pour the foam in the cup towards the candle, and the candle immediately goes off. [Principles]: In this chemical reaction, intangible gas dioxide was generated. It is heavy than air, so it sinks to the lower part of the cup when it is inverted. In addition, because it is an unmissable gas, it will suffocate the flame like a fire extinguisher: the emergence foam is composed of countless small bubbles containing carbon dioxide. They surrounded the flames and blocked oxygen to enter. The flame went out.
Production: In a large glass bottle with a single -hole plug and insert a glass tube. Add some baking soda solutions to the bottle, take a glass tube that can be loaded in the bottle. After full of acetic acid, it will be filled with acetic acid. Put the small glass tube into the bottle slowly, so that the glass tube is erected. When the rubber plugs with a glass tube are inserted, the bottle is poured and pointed to the flame of the glass, and the bottle is quickly poured. The liquid can be pressed out of the tube to extinguish the fire. The principle: The main components of the baking soda are sodium bicarbonate, which will react with acetic acid. Therefore, it is ejected from the bottle, because carbon dioxide cannot be burned or burned, so it can achieve the purpose of fire extinguishing. experimental steps and phenomena (A) Put a large bottle with a single -hole plug and insert a glass tube. Add some carbon sodium hydrogen sodium solution to the bottle, take a test tube that can be loaded in the bottle. After full of concentrated hydrochloric acid, slowly put the test tube into the bottle , so that the test tube can be erected, and the test tube can be erected. The plug is plugged on the plug. When using the fire extinguisher, pour the bottle and point the to the flame. Be careful! Don't put the tube to others or yourself. (b) Add detergent to the acid to produce a foam that produces coverage. Align the bottle at the flame, fast , turn the bottle quickly, and severely react to generate a large amount of carbon dioxide, then the pressure of the gas presses the liquid out of the tube and the fire extinguishes the fire.
Put a small candle used in the water cup and ignite. Put a tea sodium bicarbonate in the second cup and eat a little vinegar. White powder began to bubble, indicating that it is producing a gas. Gently pour the foam in the cup towards the candle, and the candle immediately goes off.
[Principles]: In this chemical reaction, intangible gas dioxide was generated. It is heavy than air, so it sinks to the lower part of the cup when it is inverted. In addition, because it is an unmissable gas, it will suffocate the flame like a fire extinguisher: the emergence foam is composed of countless small bubbles containing carbon dioxide. They surrounded the flames and blocked oxygen to enter. The flame went out.
Production:
In a large glass bottle with a single -hole plug and insert a glass tube. Add some baking soda solutions to the bottle, take a glass tube that can be loaded in the bottle. After full of acetic acid, it will be filled with acetic acid. Put the small glass tube into the bottle slowly, so that the glass tube is erected. When the rubber plugs with a glass tube are inserted, the bottle is poured and pointed to the flame of the glass, and the bottle is quickly poured. The liquid can be pressed out of the tube to extinguish the fire.
The principle:
The main components of the baking soda are sodium bicarbonate, which will react with acetic acid. Therefore, it is ejected from the bottle, because carbon dioxide cannot be burned or burned, so it can achieve the purpose of fire extinguishing.
experimental steps and phenomena
(A) Put a large bottle with a single -hole plug and insert a glass tube. Add some carbon
sodium hydrogen sodium solution to the bottle, take a test tube that can be loaded in the bottle. After full of concentrated hydrochloric acid, slowly put the test tube into the bottle
, so that the test tube can be erected, and the test tube can be erected. The plug is plugged on the plug. When using the fire extinguisher, pour the bottle and point the
to the flame. Be careful! Don't put the tube to others or yourself.
(b) Add detergent to the acid to produce a foam that produces coverage. Align the bottle at the flame, fast
, turn the bottle quickly, and severely react to generate a large amount of carbon dioxide, then the pressure of the gas presses the liquid out of the tube and the fire extinguishes the fire.