Final answer:
When using flammable refrigerants, the key safety precaution is to ensure proper ventilation. Avoid using them in confined spaces, increasing temperature around them, or wearing minimal protection. Always follow safety instructions to prevent accidents involving flammable chemicals.
Step-by-step explanation:
The additional safety precaution that should be followed when using flammable refrigerants is a) Ensure proper ventilation. It is critically important to prevent the build-up of flammable vapors which could ignite if exposed to a spark or open flame. Proper ventilation helps to dissipate any potential flammable vapors, significantly lowering the risk of a fire or explosion. Situations to avoid include b) Use in a confined space, c) Increase temperature, and d) Wear minimal protection, as these could all increase the risk of an accident.
Always follow safety instructions carefully when handling flammable chemicals. Do not expose chemicals to flames or high heat unless instructed, and ensure that you use safety equipment, like fume hoods, to mitigate the inhalation of harmful fumes. It is also essential to keep flammable substances away from open flames, like Bunsen burners, and never leave them unattended. Flammable chemicals should be handled with the same care in laboratory settings, adhering to your teacher's instructions and knowing the location of fire safety equipment.