How to judge whether the glass sheet on the gas collection cylinder is smooth and side up or down

Gas collection cylindersGround glassThe sheet is designed with a matte finish for better sealing. Regardless of the gas, the frosted surface must be in contact with the frosted mouth of the gas collector cylinder (there is also a frosted surface on the mouth of the gas collector cylinder) so that it can remain sealed. Any smooth side of the gas is not attached to the mouth of the bottle.

Gas Gathering MethodDrainage gas collection method.

The drainage gas collection method is used to collect gases that are insoluble in water, insoluble in water and insoluble in water, such as N2, O2, NO, CO, CH4, C2H2, C2H4, H2, etc.

Upward exhaust air method.

It is used to collect gases with a density greater than air, such as Cl2, NO2, SO2, H2S, CO2, O2, etc.

Downward exhaust air method.

It is used to collect gases with a density smaller than air, such as NH3, H2, etc.

The following four bottles of gas are stored correctly:

aHydrogen; The glass sheet is smooth and side up.

b. Chlorine; The glass sheet is smooth and side up.

cCarbon dioxide; The glass sheet is frosted side up.

dMethane; The frosted side of the glass sheet is facing upwards The answer is b Yes, the frosted side is in contact with the frosted side of the gas collector cylinder mouth, which is conducive to sealing.

The following gases are placed differently depending on the density of the gas collectors.

As in item a, hydrogen is denser than air, so it is lowered downwards by mouth, so the smooth side is facing down.

The density of chlorine in item B is greater than that of air, so the cylinder is square, and the smooth side is facing down.

cd judge for yourself.

The ground glass side of the gas collector cylinder is placed face down because it is filled to enhance the airtightness of the container and prevent the collected gas from escaping or mixing with foreign gases.

The gas collector cylinder is a kind of wide-mouth glass container, the bottle mouth is frosted on the surface, which can maintain close contact with the ground glass and is not easy to leak. It is used to collect gases, assemble gas washing cylinders and carry out reactions between substances and gases. It is generally used in chemistry laboratories.

In order to increase the airtightness of the gas collection cylinder, the mouth of the bottle is frosted, and the airtightness will not be good if the smooth side is facing down.

Covering the bottle mouth with the ground glass side down can perfectly complement the frosted surface of the bottle mouth, enhance the airtightness of the gas collection cylinder, and prevent the collected gas from escaping or mixing with foreign gases.

It is correct to cover the mouth of the gas collection cylinder with a hair slide with the frosted side down, and the reasons for this are as follows:

1. The gas molecules on the smooth side are easy to escape, and the sealing is not good.

2. It is easy to be knocked off when covering the bottle mouth with a smooth surface, the frosted surface is rough, the friction is large, and the hair slide is not easy to slip off.

The ground glass side should be opposite the bottle mouth, and the ground side should be facing down. This is mainly due to the fact that the rough surface and the bottle mouth can be better closed.

Yes, the frosted surface is in contact with the frosted surface of the gas collector cylinder, which is conducive to sealing. The following gases are placed differently depending on the density of the gas collectors. As in item a, the density of hydrogen is lower than that of air, so it is lowered downwards and the nucleus is carried with a smooth lead leak with a pure face down.

The density of chlorine in item B is greater than that of air-air decay, so the gas collector cylinder is square, and the smooth side is facing the argument and is not excavated. cd judge for yourself.

Because the mouth of the gas cylinder is frosted and silver, it can be sealed well in contact with the rough surface of the glass sheet.

Because the mouth of the gas collection cylinder is frosted in good spring, the high contact with the rough surface of the glass sheet can be sealed well

The ground glass is not easy to slip away because of the Qin Nian water, and the reason why it must be put down is that the density of hydrogen is too small, no matter how small the crack is, it can leak out of the stool, unless there is no gap between the closed glass and the state of the gas cylinder, you can put it as you want, otherwise the hydrogen will eventually run out of light and carry the dates.

The downward side of the ground glass is rougher, which can be completely fitted with the mouth of the gas collection cylinder, so that the inside of the gas collection cylinder is isolated from the outside world

Blocking the article

1. In order to make the sealing effect better, the frosted glass sheet is used to face the gas in the bottle with the frosted side of the glass sheet. 2. Some parts of many glass instruments should be frosted, such as the frosted surface of the gas collection cylinder at the mouth of the bottle. One side of the frosted glass sheet is also frosted, and gas collector cylinders filled with gas usually cover the mouth of the bottle with the rough side of the glass sheet facing down, instead of the smooth side.

3. Ground glass is also used to seal Hezhou cover when draining and exhausting air. Extended information: According to the simple classification of production glass, it is mainly divided into flat glass and deep-processed glass.

There are three main types of flat glass: flat glass (divided into two kinds of grooved and non-grooved), flat flat glass and float glass. Due to the uniform thickness, flat and parallel upper and lower surfaces, high labor productivity and management, float glass is becoming the mainstream of glass manufacturing.

There are many varieties of special glass, and the following is explained one by one according to the common varieties in decoration: 1. Ordinary flat glass - 4 clip glass, mm is also known as centiglass or one in daily life. When we say 3 centimeters of glass, we mean glass with a thickness of 3 mm.

This specification of glass is mainly used on the surface of the picture frame - 6 centiglass glass, mainly used for exterior wall windows, doors and other small area light transmission modeling.

Because the mouth of the silver in the beam of the gas cylinder is frosted, contact with the surface of the glass sheet can seal the rubber well

The smooth side is facing up, the frosted side is facing down, and the bottle mouth can be dipped in water to seal the bottle mouth and prevent gas leakage.