"Entering the Chemistry Laboratory" Entering the World of Chemistry PPT Courseware 4

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"Entering the Chemistry Laboratory" Entering the World of Chemistry PPT Courseware 4

Taking medicines

Many of the drugs used in laboratories are flammable, explosive, corrosive or toxic.

Taking solid medicines

Taking liquid medicines

heating of matter

How to use alcohol lamp

heat a substance

Stir while heating

Taking solid medicines

Solid medicines are usually stored in wide-mouth bottles, and medicine spoons are generally used to access medicines. Some lumpy products (such as limestone, etc.) can be picked up with tweezers. Used medicine spoons or tweezers should be wiped immediately with clean paper for next use.

When putting denser block medicines or metal particles into a glass container, you should first place the container horizontally. After putting the medicine or metal particles into the mouth of the container, slowly put the container upright so that the medicine or metal particles can slowly Slide it to the bottom of the container to avoid breaking it.

Taking liquid medicines

Liquid medicines are usually placed in narrow-mouth bottles.

1. Why should the stopper of a narrow-mouth bottle be placed upside down on the table?

2. When pouring liquid, why should the mouth of the bottle be close to the mouth of the test tube? Should it be poured quickly or slowly?

3. When pouring liquid from a narrow-mouth bottle, why should the labeled side of the narrow-mouth bottle face the palm of your hand?

4. After pouring the liquid, why should we immediately close the cork and put the bottle back to its original place?

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"Entering the Chemistry Laboratory" Entering the World of Chemistry PPT Courseware 6:

"Into the Chemistry Laboratory" Entering the World of Chemistry PPT Courseware 6 [Review Introduction] In the last class, we learned that chemistry is a science based on experiments. We learned how to observe experiments, how to describe experimental phenomena and analyze them and reasoning to draw experimental conclusions. I..

"Entering the Chemistry Laboratory" Entering the World of Chemistry PPT Courseware 5:

"Into the Chemistry Laboratory" Entering the World of Chemistry PPT Courseware 5 1. The use of solid medicines The use of solid medicines in block form: tweezers The key to the operation: one horizontal, two, three slow and vertical The key to the powder use: the medicine spoon The key to the operation : One oblique, two sent to the bottom, three upright... .....

"Entering the Chemistry Laboratory" Entering the World of Chemistry PPT Courseware 3:

"Entering the Chemistry Laboratory" Entering the World of Chemistry PPT Courseware 3 1. Chemistry Laboratory Rules 1. Entering the laboratory: step lightly and speak in a low voice. 2. Before the experiment: Preview the content, understand the purpose, and clarify the steps. 3. During the experiment: check supplies, follow instructions,...

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Update Time: 2024-10-03

This template belongs to Chemistry courseware People's Education Press Ninth Grade Chemistry Volume 1 industry PPT template

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