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[Chemical Knowledge]：Precautions for zinc sulfate heptahydrate experiment

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The zinc sulfate heptahydrate experiment requires careful compliance with the following precautions to ensure the smooth progress of the experiment and personal safety:
Be sure to wear the laboratory uniform and goggles and gloves before the experiment, and ensure that the experiment is fully armed.
2. Pay attention to the internal safety regulations of the laboratory, such as fire escape routes, emergency water and other facilities to ensure the safety of the laboratory environment.
3. Prepare the required experimental equipment and reagents in advance, keep the experimental table clean and tidy, and avoid the influence of sundries on the experimental process.
4. Before carrying out the experimental operation, carefully read the experimental manual or the experimental guidance provided by the teacher to understand the required steps and precautions.
5. Pay attention to the correct use of experimental equipment to avoid accidents caused by improper operation.
6. When preparing reagents, it should be carried out in accordance with the proportion and method specified in the experimental manual, and it is strictly forbidden to change the experimental steps at will.
7. Strictly control the temperature and stirring speed in the experiment to avoid affecting the experimental results.
8. During the reaction of the solution, carefully add the reagent slowly and observe the reaction process to prevent the generation of dangerous gases.
9. After the completion of the experiment, clean up the experimental table and recycle the waste articles in time, and thoroughly clean the experimental equipment.
10. The waste reagent after the experiment shall be disposed according to the method specified by the laboratory, and shall not be poured into the sewer or garbage can at will.
Through the careful compliance of the above precautions, the zinc sulfate heptahydrate experiment can be carried out safely and smoothly, and the personal safety of the experimental personnel and the accuracy of the experimental results can be guaranteed to the greatest extent.

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