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新闻展览  2022 03-25 Chemical dictionary tells you what is a wash bottle, the cleaning method of the wash bottle and the use of precautions, wash bottle is used to inject a fine stream of water to achieve the rinsing of r 2021 10-16 I. Classification according to the heat change of resin (A) thermosetting plastics Thermosetting plastic material refers to a class of plastics that cannot be heated and softened again after mold... 2021 08-10 (a) PE, PP, PA, etc. have different bendability, hard wax-like slipperiness to the touch, and soft horn-like sound when tapped. In comparison, PS, ABS, PC, PMMA, etc., there is no extensibility, ha... 2021 06-11 Plastic beaker chemistry experiment basic operationA, the plastic beaker drug access(a) three principles 1. access to drugs "three" principle of not: do not touch, do not taste, do not smell2. take... 2021 06-21 Unconventional methods to measure the density of solids in a variety of ways Balance, measuring cylinder (or measuring cup) are two common tools for measuring density, but sometimes subject to the ... 2021 06-21 Washing bottle cleaning method1、Check whether the plastic washing bottle is leaking before use. The specific operation is: fill two-thirds of the bottle of water in the plastic washing bottle, scre... 2021 06-21 The use of plastic beakers and the introduction of the use of How to use beakers and how to use them Usage and use Beakers are the most commonly used reaction containers for simple chemical ... 2021 06-21 I believe we all know about the measuring cylinder, after all, we have seen and used this kind of things when we were studying in school, so we should know more about it. In fact, the measur... 2021 06-21 Caution:(1) Do not use a measuring cylinder to prepare a solution or perform a chemical reaction.(2) Do not heat or fill with hot solutions to avoid blowing up.(3) When measuring liquids should be ... |