Question

after completing an experiment, all chemical wastes should be...
después de completar un experimento, todos los desechos químicos deben ser
○ taken home/ llevado a casa
○ disposed of according to your teacher’s directions/ desechados de acuerdo con las instrucciones de su maestro
○ dumped in the sink/ tirado en el fregadero
○ left at your lab station for the next class/ dejó en su estación de laboratorio para la próxima clase

Explanation:

In a laboratory setting, especially after a chemical experiment, safety and proper handling of chemical wastes are crucial. Taking chemical wastes home is unsafe and against lab protocols. Dumping them in the sink can cause environmental or plumbing issues. Leaving them at the lab station is also improper as it can pose risks for the next class. The correct practice is to dispose of chemical wastes as per the teacher's (or lab instructor's) directions, as they know the proper and safe methods for disposal based on the nature of the chemicals.

Answer:

B. disposed of according to your teacher’s directions/ desechados de acuerdo con las instrucciones de su maestro