Is there a requirement for which hand to use a beaker

Is there a requirement for which hand to use a beakerThere is a requirement to use the right hand, which is more stable for most people.

There is no requirement, which hand you use, and which hand you use can be used without asking which hand you use.

No! The use of beakers as a common equipment in daily life and laboratories depends on the user's ability, usage habits, use, and environment. The use should be based on safety and efficiency.

A beaker is a common type of laboratory glassware made of glass, plastic, or heat-resistant glass. The beaker is cylindrical in shape and has a notch on one side of the top for easy pouring of liquids. Beakers are widely used to hold corrosive solid drugs for weighing, heating, dissolving, mixing, boiling, melting, evaporation concentration, dilution and precipitation clarification of chemical reagents, etc., and the common beaker specifications range from 5ml to 5000ml.

In the process of using the beaker, the experimenter needs to hold the beaker in one hand and take sampling or stirring with the other hand, and the convenience of operation is poor, and if the reagent is easy to splash into the experimenter's hand, it brings certain potential safety hazards.

1) The beaker should not contain too much solution, about 1 2 of the volume, but when heating, the solution should not exceed 1 3 of the volume.

2) The beaker can not be dry boiled, and can only be heated for a long time when it contains liquid, but it must be padded with asbestos netting.

3) When holding the beaker, take the outer wall and do not touch the inner wall with your fingers. Take the beaker when it is heated, and use a beaker clip.

4) When it is necessary to stir the solution in the beaker with a glass rod, the glass rod should be rotated evenly along the wall of the cup, and the wall and bottom of the cup should not be hit.

5) The beaker should not be stored for a long time with chemical reagents, and should be washed, dried and stored upside down immediately after use.

A beaker is a common type of laboratory glassware that is cylindrical in shape and has a notch on one side of the top to facilitate pouring liquids. Its main uses are: 1. It is used as a reactor for substances; 2. Dissolve and crystallize a substance; 3. Containing, evaporating, concentrating or heating solutions; 4. Hold corrosive solid drugs for weighing.

Beakers are available in 5ml, 10ml, 25ml, 50ml, 100ml, 250ml, 500ml, etc. When using a beaker, pay attention to the fact that when heating the beaker, an asbestos net should be padded to provide uniform heating.

The beaker should not be heated directly to avoid uneven heat that could cause explosions. When used for dissolution, the amount of liquid should not exceed 1 3 of the beaker volume and stir gently and constantly with a glass rod. When the liquid is heated, it is generally appropriate to take 1 3 of the beaker volume, and when heating corrosive drugs, a surface dish can be covered on the beaker mouth to avoid the liquid from splashing.

1. The reactor of the substance, determine the combustion products. 2. Dissolve and crystallize a substance; 3. Containing, evaporating, concentrating or heating solutions;

4. Weigh anti-corrosive solid drugs in the city. Precautions The beaker is used as a reaction vessel for preparing solutions, dissolved substances and larger amounts of substances at room temperature or under heating conditions.

Beakers are a common one. Laboratory glassware, usually made of glass, plastic, or heat-resistant glass. So, what are the main uses of beakers, let's find out!

Main uses of beakers:

1. The reactor of the substance, the hand does not regret to determine the combustion products.

2. Dissolve and crystallize a substance;

3. Containing, evaporating, concentrating or heating solutions;

Notes:

Beakers are used as reaction vessels for the preparation of solutions, dissolved substances and larger quantities of substances at room temperature or under heating. Attention should be paid to the use of beakers:

1. When heating the beaker, an asbestos net should be padded. It is not possible to heat the beaker directly with a flame. Because the bottom surface of the beaker is large, it can only be burned to a part by direct heating with a flame, which causes the glass to burst due to uneven heating.

2. When heating the liquid with a beaker, the amount of liquid should not exceed 1 3 of the volume of the beaker to prevent the liquid from overflowing during boiling. When heating, the outer wall of the beaker must be wiped dry.

3. When heating corrosive drugs, a surface dish can be covered on the mouth of the beaker to avoid liquid splashing.

4. Do not use a beaker to hold chemicals for a long time, so as not to fall into the dust and evaporate the water in the solution.

The uses of the beaker are as follows:

1. It is used as a reactor for substances.

2. Dissolve and crystallize a substance;

3. Containing, evaporating, concentrating or heating solutions;

4. Hold corrosive solid drugs for weighing.

Types of beakers:

1. Low-type beaker. The low beaker is the most commonly used beaker in the laboratory, designed by the British chemist John Joseph Griffin, so it is also called the Griffin beaker (Griffin beaker).

The height of the low beaker is about twice its diameter, and it is used in most chemical experiments.

Beakers are used in different sizes for different applications, and beakers with a volume of 1 to 50 ml are mainly used for microanalysis. Beakers with a volume of 50 to 2000 ml are mainly used for constant analysis and as containers for general chemical reactions, or for temporary storage of liquids.

2. A tall beaker. The height of the high form berzelius beaker (also known as the beaker or electrolytic beaker) is about twice the diameter.

Its unique slim shape prevents splashing during heating due to boiling or when dripping liquid from above, and can also be used for electrolysis in place of an electrolyzer and occasionally for titration in place of an Erlenmeyer flask. Because the high beaker is smaller than the low beaker of the same height, it can relatively reduce the amount of reagent when using it for experiments, so as to achieve the effect of saving reagents.

3. A conical beaker. An Erlenmeyer beaker (also known as a Freund's beaker, milk beaker, or triangular beaker) is shaped like an Erlenmeyer flask, with a wide lower part and a narrow upper part to facilitate shaking and prevent liquid from spilling. It can be used to receive fractions at atmospheric distillation and to titrate the solution to be measured.

4. Dyeing beakers. The beaker dye pot is conical in the shape of a wide upper part and a narrow lower part, but there is a sudden widening in the middle and upper part, which is used in staining-related experiments.