Final answer:
The correct procedure for disposing of lab waste is to follow the teacher's instructions and local regulations, especially for hazardous materials. Shae's approach of returning chemicals to their original containers and disposing of them appropriately is the most accurate among the options provided.
Step-by-step explanation:
The correct approach to disposing of waste after a lab session is often guided by the specific materials involved and the recommendations of the teacher or lab supervisor. Regarding the students' debate in group C, the proper disposal method can be determined as follows:
- Tammy's suggestion to "mix all liquids and dispose of them in the trash can" is incorrect because certain chemicals can react with each other and should not be mixed, and liquids might not be suitable for the trash can.
- Ben recommends that "Most liquids may go down the sink. All solids are to be placed in the trash can." However, this is also incorrect, considering the provided information that advises checking with a teacher because chemicals should not be disposed of down the sink.
- Janet's idea that "As long as the materials are separated, everything can be thrown into the trashcan." is potentially unsafe as some materials, especially hazardous chemicals, should not be disposed of in the trash can without specific treatment.
- Shae's approach to "return the chemicals to the original container and then dispose of the liquids accordingly" seems the most accurate, as this takes into consideration the potential need for proper disposal methods for different chemicals.
In conclusion, it is vital to follow the teacher's instructions and local regulations regarding waste disposal to avoid causing harm to the environment or human health. For hazardous materials, proper disposal methods must be adhered to, rather than simply discarding them in the trash or pouring them down the sink.