"Basic Skills Training for Chemical Experiments" Entering the Palace of Chemistry PPT

"Basic Skills Training for Chemistry Experiments" Entering the Palace of Chemistry PPT, 26 pages in total.

Understand laboratory safety rules

Laboratory safety rules

1. Eating, drinking, playing, and talking loudly are not allowed in the laboratory.

2. Keep flammable and explosive drugs away from fire sources; avoid getting corrosive drugs on your clothes or skin.

3. Before entering the laboratory, the experimental tasks, experimental procedures and precautions should be clearly understood. For experimental plans designed by yourself, you must obtain the teacher's consent before entering the laboratory for operation.

4. Before starting the experiment, check whether the experimental supplies are complete; during the experiment, keep the experimental supplies in order.

5. Do not touch the medicine with your hands, do not put your nostrils to the mouth of the container to smell the medicine, and it is strictly forbidden to taste the medicine.

6. Wear goggles as much as possible when doing experiments; during heating operations, do not get close to the heated instrument and look directly at it, and do not point the test tube mouth toward yourself or others.

7. Do not put the remaining medicines back into the original bottles, do not throw them away at will, and do not take them out of the laboratory. They must be placed in designated containers.

8. After the experiment is completed, the utensils used should be washed in time; the instruments and medicines should be classified and sorted and placed in the prescribed locations.

9. Pay attention to the safe use of electricity and water conservation. Always turn off power and water before leaving the laboratory.

Understand common chemical instruments

Do you recognize these instruments?

reaction vessel

Heating instrument

Measuring instruments

Fixed and supported instruments

Instruments for separating substances

Understand commonly used hazardous chemicals signs

Many of the chemicals used in chemical instruments are flammable, explosive, corrosive or toxic. Students should learn about the symbols of commonly used hazardous chemicals

Taking medicines

Principles for taking laboratory chemicals

1. Do not touch the medicine with your hands, do not put your nostrils to the mouth of the container to smell the medicine, and do not taste any medicine.

2. When taking medicines, you should pay attention to economy. If the dosage is not stated, you should generally take it according to ________. For liquids, it is _______, and for solids, it is only __________.

3. The remaining medicines from the experiment should be put into _____________. Neither ___________, nor ___________, nor ___________.

heating of matter

1. Heating equipment: alcohol lamp, alcohol blowtorch, electric furnace

2. The flame of an alcohol lamp can be divided into _____________, with the lowest flame core temperature and the highest _____ temperature. _____ heating should be used when heating.

3. Instruments that can be heated directly: _____________.

4. Instruments that should be padded with asbestos nets when heating: _____________.

5. Instruments that cannot be heated: measuring cylinders, gas bottles, funnels.

Class summary

1. Understand laboratory safety rules

2. Understand common chemical instruments

3. Rules for taking laboratory drugs

The "three no's" principle, the principle of economy, and the principle of disposal

4. Access to medicines

1. Taking solid medicines

Block form: tweezers Powder form: medicine spoon

2. Taking liquid medicines

Drop: dropper Pour: test tube

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