In many chemical experiments, the beaker is indispensable equipment, chemical products can be better enough to display in a beaker, the beaker is a common laboratory glassware, usually made of glass, plastic, or made of heat-resistant glass. The beaker is cylindrical, the top side is provided with a notch, which is convenient for pouring liquid chemical reagents. Some also graduated beaker wall, the liquid can be roughly estimated that the volume of the beaker.
The beaker can generally be heated when heated should generally uniform heating, it is best not to dry. The beaker is often used to configure solution and the reaction vessel as a chemical reagent of relatively large amounts of. In the operation, often with a glass rod or magnetic mixer for mixing. Common beaker specifications are: 10mL, 15mL, 25mL, 50mL, 100mL, 250mL, 400mL, 500mL, 600mL, 1000mL, 2000mL.
Using the method of 1 Chemical reagent products in the beaker
Because of its uniform caliber beaker, using chemical reagent liquid is very convenient, is the reaction vessel do simple chemical reaction most commonly used. The outer wall of a scale, can estimate the volume of solution in the. Some beaker at the outer wall will also have a small piece of white or burr, name in this area can be described in writing with a pencil containing objects. If the area can be the name of the beaker, Sheng material written on the label paper, then paste in the beaker wall as a logo for. When the reactants need to be stirred, they are usually stirred with a glass rod. When the solution to be moved to other containers, can be the cup to the side has highlighted the gap can be smoothly inclined, pour the solution. To prevent the solution along the cup wall lateral flow, available a glass rod touch cup is attached to the solution in the cup smoothly along the glass flow.
2 chemical reagent products mainly used in the beaker
1, the substance of the reactor, to determine the combustion product.
2, dissolution, crystallization of a material.
3, Sheng take, evaporation condensation or heating solution.
3 note in the beaker of chemical reagent products
Normal temperature or heating condition of preparation of reaction vessel solution, dissolved substances and a large amount of material in a beaker. Use the beaker should pay attention to:
1, the beaker heating pad on the asbestos net, with uniform heating. With direct flame heating not because the bottom of beaker, beaker, with direct flame heating, can only be burned to the local, the glass is heated unevenness caused by explosion. When heated, the beaker wall shall be dry.
2, when the quantity of liquid for dissolving, not to exceed the beaker volume should be 1/3. And gently stirring with the glass rod. In the process of dissolving or dilution, when the glass rod is stirred, the cup bottom or the cup wall is not touched.
3, liquid heating, do not exceed the beaker volume 2/3, with volume beaker should be 1/2.
4, heating corrosive drugs, can be a dish cover in the mouth of the beaker, in order to avoid spills.
5, is not available for long-term beaker chemical reagent, so as not to fall into the dust and the water evaporation in the solution.
6, can not use the beaker amount of chemical reagent liquid
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