What are the types of chemical sucking What does chemical sucking mean

Mainly at the high school level, pressure changes are the main cause.

During the reaction, the temperature drops suddenly, causing the system to form a negative pressure and suck back;

2.During the reaction, the reaction gas is introduced so slowly that the system forms negative pressure and sucks back;

3.During the reaction, the dissolved gases are added too quickly, so that the system forms negative pressure and sucks;

4.The reaction speed accelerates with the change of conditions, which slows down the original ventilation speed, forms negative pressure and sucks, and other conditions change.

1。After the reaction, the gas is consumed, and the gasp.

2.There is a gas that is highly soluble with water, suction.

3.A large change in temperature leads to a large change in the volume of the gas, sucking.

Chemical sucking is caused by the fact that the gas dissolves in water in the trachea, causing the air pressure in the trachea to drop and form a pressure difference with the outside world.

The principle of suction: due to the decrease of pressure in a closed container, such as when gas is passed into a reagent with high solubility, when the instrument has been cooled and heated, the atmospheric pressure is greater than the internal pressure and the water is pressed into the container, forming suction.

The method of anti-dumping and anti-suction is as follows: anti-suction in the device, add a safety bottle to the device, absorb the gas with an inverted funnel, so that the trachea is very close but not in contact with water, Qipu generator and similar devices, prevent sucking in the steps, in the imitation posture experiment of heating the gas and collecting the gas with drainage or washing the gas with the solution, at the end of the experiment, the Zen studio should first take out the catheter inserted in the solution, and then extinguish the alcohol lamp to prevent sucking.

Suction is caused by the gas dissolving in water in the trachea, which causes the air pressure in the trachea to drop and form a pressure difference with the outside world, so it leads to sucking.

Hope mine is helpful to you.

Although gas is constantly generated, as long as the gas comes into contact with water, it will dissolve in water, and the rate of dissolution must be faster than the gas generated.

Explanation of the phenomenon of suction: First of all, the device must be released from the liquid during suction. Due to some reason, the internal pressure of the device will be rapidly lowered, causing a pressure difference, so that the liquid will be pressed into the device, resulting in back-sucking.

Suction is caused by a sudden decrease in the air pressure inside the sealed test tube. So the water will suck down the duct.

The gas dissolves in the water, causing the air pressure inside the device to decrease and the air pressure outside the device to increase, thus drawing water into the device.

The principle of gasp.

Due to the decrease in the pressure in the closed container (such as when the gas is passed into the reagent with high solubility, the instrument that has been cooled and heated, etc.), the atmospheric pressure is greater than the internal pressure and the water is pressed into the container, forming suction.

The dangers of gasping.

If the previous chemical instrument is being heated, the chemical instrument will explode due to thermal expansion and contraction.

Contaminating the reagents in the container.

Anti-sucking methods.

Anti-sucking in the device.

Add a safety bottle to the unit.

Absorb the gas with an inverted funnel.

Keep the airway very close to each other, but not in contact with water.

Qipu generators and similar devices.

Prevent back-gasping on the steps.

At the end of the experiment, the catheter inserted in the solution should be removed first, and then the alcohol lamp should be extinguished to prevent gasping.