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[Chemical Knowledge]：Notes on the preparation of sodium sulfide solution

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Sodium sulfide is a common chemical reagent, which is widely used in laboratory and industrial production. When preparing sodium sulfide solution, the following matters need to be paid attention to to ensure the safety of the experiment and the accuracy of the preparation.

need to prepare clean containers and laboratory utensils. The container for preparing sodium sulfide solution should be clean and free of impurities, so as not to affect the concentration and purity of the prepared solution. Laboratory utensils should also be strictly cleaned to avoid reaction with other chemical reagents.

The preparation of sodium sulfide solution needs to be prepared in strict accordance with the formula ratio. Too high or too low concentration will affect the accuracy of the experiment, and may even lead to the failure of the experiment. When measuring the ratio of sodium sulfide to water for preparation, precise weighing instruments and accurate volumetric flasks should be used to ensure the accuracy of the prepared solution.

sodium sulfide will release a lot of heat during the dissolution process, it is necessary to be careful in the process of slowly adding sodium sulfide to prevent the solution from splashing.

sodium sulfide solution is a toxic chemical reagent, which needs to be prepared and used. It is recommended to prepare in a well-ventilated laboratory to avoid inhalation of sodium sulfide vapor. When using sodium sulfide solution, protective glasses and gloves should also be worn to avoid contact with skin.
The
prepared sodium sulfide solution should be clearly marked with the concentration, preparation date and user in time to avoid confusion and misuse.

prepared sodium sulfide solution should be properly stored, avoid exposure or high temperature, to ensure its stability and extend the service life. At the same time, sodium sulfide solution also needs to be kept away from acids and oxidants and other chemical reagents to avoid dangerous accidents. These are the precautions for the preparation of sodium sulfide solution. I hope everyone can strictly abide by them in the laboratory operation to ensure the safety and accuracy of the experiment.

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