Excuse me, what does "beaker" mean?

Beaker refers to a common laboratory glassware, which is made of glass, plastic or heat-resistant glass. The beaker is cylindrical and has a notch on the top side, which is convenient for pouring liquid. Beakers are widely used for heating, dissolving, mixing, boiling, melting, evaporation and concentration, dilution, precipitation and clarification of chemical reagents.

use

Matters needing attention

Beakers are used as reaction containers to prepare solutions, dissolved substances and a large number of substances at room temperature or under heating conditions.

Attention should be paid to the use of beaker:

1. When heating the beaker, put a clay net (a substitute for asbestos net) on it to provide uniform heating. You can't directly heat the beaker with flame because the bottom of the beaker is large. If directly heated by flame, it can only burn locally, which will cause the glass to burst due to uneven heating. When heating, the outer wall of beaker must be dry.

2. When used for dissolution, the amount of liquid should not exceed 1/3 of the beaker volume, and gently stir with a glass rod. In the process of dissolution or dilution, when stirring with a glass rod, do not touch the bottom or wall of the cup.

3. When the liquid is heated, it should not exceed 2/3 of the beaker volume, and generally 65438+ 0/3 of the beaker volume is appropriate.

4. When heating corrosive drugs, cover the watch mirror on the beaker mouth to avoid liquid overflow.

5. Don't put the chemicals in the beaker for a long time, so as not to fall into the dust and evaporate the water in the solution.

6, can't use a beaker to measure liquid.