Final answer:
Before directing the head of the vaporizer towards anyone, ensure it is safe to do so, avoid direct inhalation of chemicals, and always work in well-ventilated areas with proper supervision and safety measures like not leaving Bunsen burners unattended.
Step-by-step explanation:
The head of the vaporizer should be turned away from the client until there is no risk of exposure to harmful vapors or chemicals. In a laboratory setting, safety is paramount, and proper protocols must be followed to ensure a safe learning and working environment.
One of the crucial rules when handling chemicals is to ensure they are not directed towards a person, as this could result in accidental injury. Similarly, substances should never be smelled directly; instead, you should use your hand to gently waft the fumes towards your nose, allowing you to detect the presence of chemicals without risking direct inhalation.
In accordance with safety protocols, it is essential to work in a well-ventilated room and avoid leaving items such as Bunsen burners unattended, which could lead to a fire or cause hazardous conditions.
Furthermore, substances should never be tasted or touched unless there are specific instructions or supervision stating that it is safe to do so. All these precautions help to create a laboratory environment where students and professionals can conduct their experiments safely.