Answer to Question #211139 in General Chemistry for emmanuel kazeya

Question #211139

(1).List down ten donts and dos in the laboratory.

(2)list down 20 laboratory safety rules.

(3)what is sterilization.

(4) list down methods of sterilization



1
Expert's answer
2021-06-30T03:57:04-0400

When working in a chemical laboratory, the following rules must be observed:

The work must be pre-planned by the student and approved by the teacher.

There should be no foreign objects on the laboratory table during work.

In the laboratory, you should work in a cotton robe, your hair should be removed.

It is strictly forbidden to take food in the laboratory.

It is necessary to wash your hands before and after performing the work.

You need to work carefully, the result of the experiment depends on the purity of the experiment.

All experiments with toxic and odorous substances should be carried out in a fume hood.

Take chemical reagents only with a spatula, tweezers or a spoon (not with your hands!).

Do not pour out unspent reagents and do not pour them back into the vessels from where they were taken.

Work with solid alkalis should be carried out only with protective glasses and gloves.

Pour liquids through chemical funnels. The bottle from which the liquid is poured must be held with the label to the hand in order to avoid its damage.

When heating solutions and substances in a test tube, it is necessary to use a holder. The opening of the test tube should be directed away from yourself and other workers.

Do not bend over the vessel in which the liquid is heated or boiled.

If necessary, to determine the smell of gases released during the reaction, you need to direct a stream of gas from the throat of the vessel to yourself with a slight movement of the palm of your hand and carefully inhale.

When diluting concentrated acids and alkalis, pour the acid (or a concentrated solution of alkali) into the water in small portions, and not vice versa.

Dangerous reaction products should only be drained into the appropriate cans in the fume hood.

If you have any questions, please contact the teacher immediately.


Sterilization is the complete destruction of microorganisms (including bacteria, fungi, viruses and prions) and their spores on various products, surfaces and preparations. It is carried out by thermal, chemical, radiation, filtration methods.


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