What is a Beaker?
A beaker is a common laboratory glassware made of glass, plastic, or heat-resistant glass. The beaker is cylindrical with a notch on one side of the top for easy pouring of liquid. Beakers are widely used for heating, dissolving, mixing, boiling, melting, evaporating, concentrating, diluting, and clarifying chemical reagents. [1]
- A beaker is a common laboratory glassware, usually made of glass, plastic, or heat-resistant glass. The beaker is cylindrical with a notch on one side of the top for easy pouring of liquid. Some beakers are also marked on the outside wall to give a rough estimate of the volume of liquid in the beaker.
- The beaker can generally be heated. Generally, the beaker should be heated evenly, and it is better not to dry it.
- Beakers are often used to configure solutions and reaction vessels as larger amounts of reagents. During operation, glass rods or magnetic stirrers are often used for stirring. [2]
- The specifications of common beakers are: 5mL, 10mL, 15mL, 25mL, 50mL, 100mL, 250mL, 300mL, 400mL, 500mL, 600mL, 800mL, 1000mL, 2000mL, 3000mL, 5000mL.
- The specific specifications are as follows:
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- Because the beaker has the same caliber, the liquid is very convenient to take, and it is the most commonly used reaction container for simple chemical reactions. When the outer wall of the beaker is graduated, the volume of the solution in it can be estimated. Some beakers will also have a small block on the outer wall that is white or edging. In this area, you can use a pencil to describe the name of the contents. If there is no such area on the beaker, the name of the contents can be written on the label paper, and then pasted on the outer wall of the beaker for identification. When the reactants need to be stirred, they are usually stirred with a glass rod. When the solution needs to be moved into other containers, the cup mouth can be tilted toward the side with the protruding notch, and the solution can be poured out smoothly. To prevent the solution from flowing down the outside of the cup wall, you can touch the mouth of the glass with a glass rod, and the solution attached to the mouth of the cup can flow down the glass rod smoothly. [2]
- The main uses of the beaker are as follows:
- 1.material
- The beaker is used as a reaction container for preparing a solution, a dissolved substance and a relatively large amount of substance at normal temperature or under heating.
- When using a beaker:
- 1. When heating the beaker, put on an asbestos net to provide uniform heating. The beaker cannot be heated directly with a flame, because the bottom surface of the beaker is large, and the direct heating with a flame can only be burned to the local area, which causes the glass to be unevenly heated and cause the glass to burst. When heating, the outer wall of the beaker must be dried.
- 2. When used for dissolution, the amount of liquid should not exceed 1/3 of the beaker volume, and it should be constantly stirred with a glass rod. When dissolving or diluting, do not touch the bottom or wall of the cup while stirring with a glass rod.
- 3. When the liquid is heated, do not exceed 2/3 of the beaker volume, generally 1/3 of the beaker volume is appropriate.
- 4. When heating corrosive medicines, cover a watch glass on the mouth of the beaker to prevent liquid from splashing.
- 5. Do not use chemicals in the beaker for a long time to avoid falling into the dust and evaporating the water in the solution.
- 6. Do not use a beaker to measure liquid. [2]