The safety of chemical experiments is an important examination content of the competition, and it is also a basic requirement for experimental operation. Safety specifications include: 1. To enter the laboratory, you must wear lab clothes, goggles, and long hair; 2. It is strictly forbidden to eat or play in the laboratory; 3. It is necessary to understand the nature of hazardous chemicals and emergency measures before using them; 4. When heating the tube, the nozzle should not be facing the person; 5. When smelling gas, gently fan it with your hand, and do not directly smell it; 6. When diluting concentrated sulfuric acid, slowly pour the acid into the water and stir, do not pour the water into the acid; 7. The experimental waste liquid shall be poured into the designated container and shall not be directly poured into the sink; 8. Wash hands and organize equipment after the experiment. Emergency treatment: Apply sodium bicarbonate solution after rinsing with plenty of water for skin contact with acid; apply boric acid solution after rinsing with plenty of water for contact with alkali; extinguish the fire immediately with a damp cloth or fire extinguisher, evacuate and alarm if necessary. Safety first, any experiment must be conducted under the guidance of a teacher.