Safety in chemistry lessons: the rules of behavior in the chemistry classroom for students

School. Non-settled students. Even in high school, children remain children. Therefore, special attention should be paid to ensure that they observe the safety rules in chemistry classes, since this lesson deals with hazardous substances and reagents.

Safety rules in the chemistry lesson are taught to children at the very beginning of acquaintance with a new subject. And throughout the academic year for how students observe them, the teacher is responsible.

How should a chemistry cabinet be prepared for the lesson?

In the laboratory, where experiments are conducted, there must be a first-aid kit filled with all necessary medicines, with the help of which it is possible to provide first aid in case of injury to students. In addition to the first aid kit, the room must be equipped with a fire shield and a fire extinguisher.

Before the beginning of the lesson, the instructor should conduct safety instruction in the chemistry lesson. Also, once a month, students are required to take the test according to the knowledge of the safety rules in the chemistry room. About the instruction and offset the data are recorded in a special safety journal at the chemistry lessons. And each student must sign, indicating that he is familiar with the rules and agrees to their observance.

The requirements that are put forward for personal protection of students

During laboratory work experiments with alkalis and acids, gases or other dangerous substances are sometimes put. Also used different heating appliances and glassware. For this reason, the risk of injury is very high if the safety precautions in chemistry lessons and the rules of conduct in the office are not followed.

For this, the teacher, and the students themselves, must be fully protected in case of unforeseen situations. First of all, clothes should be protected with a robe, rubber gloves on their hands, eyes covered with glasses. Shoes should also be comfortable and practical. Shoes with high heels or with a sliding sole are not allowed.

All experiments should be carried out strictly in the laboratory. In no case can they be carried out in rooms that are not adapted for experiments. Before starting classes, especially laboratory work, you need to carefully check the condition of all equipment, as well as to remind you how to observe the safety practices in chemistry classes. For students, the preparation is to get acquainted with the tasks of the work.

What will happen if a schoolboy breaks safety at a chemistry lesson?

In the process of experience, the most unforeseen situation can happen. Let us consider the approximate case. The schoolboy forgot to close the test tube with the reagent and left it open on the table. What can happen in this case?

In this case, the following events can occur:

• The reagent can evaporate, while producing an unpleasant odor, from which the head may be ill.
• Vapors can get into the human respiratory tract and cause irritation of the mucous membrane or toxic poisoning.
• Glassware can turn over, and the solution - get on the clothes or the skin of the pupil, which is fraught with such consequences as the inflammation of clothes or a burn.

Who can be admitted to work in the chemistry lab?

Observe the safety rules at the chemistry lesson should be by everyone who is in the office, without exception. To work with reagents it is allowed to admit only people who have reached the age of 18 and have undergone medical examination, in particular allergic reactions to drugs.

People who have been admitted to work should carefully observe the safety practices in the chemistry room, as well as the routine.

What are the consequences of non-compliance with TB?

No matter how the safety precautions are observed in chemistry lessons, unforeseen situations still occur.

• Chemical burns as a result of contact with reagents on the skin or eyes.
• Thermal burns by heating devices or open flame when the reagents are heated in flasks.
• Cuts in laboratory instruments with inaccurate use.
• Toxic poisoning with reagent vapors, if used improperly.
• Burns in case of a fire during inaccurate operation of heating appliances.
• During incorrect use of electrical appliances, there may be a severe electric shock.

The rules of behavior in the chemistry classroom that students need to perform

Since there are a lot of dangerous chemicals in the chemistry room, the following rules should be observed:

• First of all, we must remember that students in any case can not be in the study of chemistry without a teacher.
• Students are in no way allowed to perform the lab assistant's work.
• The chemistry cabinet should only be used for its intended purpose and in no case should it be reserved for holding extended-day groups, as well as conducting lessons in other subjects.
• During off-hour time only schoolchildren are admitted to the chemistry class who are engaged in a chemistry class or faculty.
• In no case is it allowed to eat in the chemistry cabinet and in overalls.
• In the study of chemistry must be present hood ;
• Everyone who is in the chemistry cabinet must wear individual protective equipment: a dressing gown, gloves, goggles, an apron. The robe is always fastened only in front, the cuffs should also be buttoned, the length of the robe must be below the knees.
• Wipe the personal protective equipment that is used in the chemistry cabinet, separately from the rest of the clothes and linen.
• To everyone who is in the chemistry room, you need to follow the rules of personal hygiene and not use other people's objects.
• In the office of chemistry must necessarily be a fire shield and a box of sand, as well as a fire extinguisher.
• In the laboratory it is necessary to have a first-aid kit, fully equipped with drugs for first aid.
• Everyone who is in the chemistry cabinet should be aware of where the fire shield and first-aid kit are located.
• In the event of an unforeseen event, you first need to notify the school administration.
• Everyone who is in the chemistry room must necessarily know how safety is observed in the chemistry lessons at school, the rules for handling reagents and electrical appliances that are used in the office. In addition, everyone should keep their workplace clean.
• Necessarily in the office should be equipped with a "Corner of safety engineering", in which all the rules of conduct in the chemistry lesson should be present.

Schoolchildren who do not adhere to the rules of behavior in the chemistry classroom, or if they do not observe the safety precautions in the chemistry room, are disciplined according to the internal rules for violation of discipline. And, accordingly , they will pass an extraordinary test to test knowledge of safety engineering.

Basic requirements for admission to work in the chemistry room

To work in the chemistry class, students can be admitted only when the following requirements are met:

• Before starting work, it is necessary to ventilate the room in order to avoid poisoning from possible evaporation of reagents.
• Wear all protective equipment to avoid contact with reagents on the skin and eyes.
• Carefully prepare for the experiments all the necessary equipment.

How to adhere to safety rules while working?

The teacher should first of all teach the students to follow several rules during their work:

• When carrying out work in the laboratory, the workplace must be kept clean.
• In no case should you try the reagents to taste, and do not inhale the vapors of reagents full.
• Handle reagents very carefully to avoid skin contact.
• Make sure that the dishes for the experiments are sterile clean.
• All dishes with chemicals must be marked;
• Bulb with reagents should be taken in hand, adhering to the rules. That is, we take one hand by the neck, the second we hold the bottom.
• When transferring the reagents from the dishes to the dishes, make sure that the label is on the top.
• The remainder of the reagent is washed from the neck of the dishes only by the edge of the flask into which the reagent
• When using a pipette, do not pull the reagents in by mouth.
• Reagents solid should be taken only with the help of sovochka or other special devices.
• During the heating of reagents, in no case should you turn the bowl with your neck to yourself or look into it.
• Do not pour reagents and acids into the sink, collect all the waste in a special dish.
• In no case can not be self-made dishes for experiments.
• Disciples should be given reagents only in quantities necessary for experiments.

What actions are taken after the end of classes

After working in the laboratory, students should prepare a room for the following young chemists. For this they must:

• Without fail, remove your workplace.
• Waste the waste in a special container for disposal.
• Remove work clothes and protective equipment;
• Wash hands with soap and water.
• Open windows and doors for ventilation.

What should you do during an emergency?

If during work an accident occurred and someone overturned the reagent, was injured by a chemical tool or something else happened, the actions should be as follows:

• If the vessel is damaged, the fragments should be collected with the help of special items intended for this purpose.
• Disperse reagents are cleaned in accordance with safety requirements.
• If the liquid spilled in the laboratory is flammable, you should start recycling as soon as possible and call the fire department immediately,
• In case of injury, notify the school director, if necessary - call an emergency.

What should be the first aid kit in the chemistry cabinet?

This is an inalienable object in the chemistry room, the most necessary medicines and antiseptics are stored there. The simplest set should be as follows:

1. Packaging of sterile bandage.
2. Packing of non-sterile bandage.
3. Packaging of sterile napkins.
4. 50 g sterile absorbent cotton wool.
5. Tweezers for tampons.
6. 1 bottle 25-50 ml glue BF-6, which is treated with small wounds.
7. Vial 25-50 ml of alcohol solution of iodine, for the treatment of cuts.
8. 50 ml of 3% hydrogen peroxide solution.
9. Activated carbon.
10. 10% solution of ammonia.
11. A vial of 10-20 ml of Albucida is 30%. Use when the reagent enters the eyes.
12. 30-50 ml of ethyl alcohol.
13. 20-30 ml of glycerin for the treatment of burn wounds.
14. 200-300 ml 2% solution of soda, for treatment of acid burn
15. 200-250 ml of a 2% solution of boric acid.
16. 3 pcs. Pipettes
17. Ordinary and bactericidal adhesive plasters.
18. Hemostatic tourniquet.