Question

1. after you clean your work area, what should you do before leaving the laboratory?
2. is it always appropriate to dispose of chemicals by flushing them down the sink?

Explanation:

For question 4, laboratory safety protocols usually require washing hands to remove any potential chemical residues. For question 5, flushing chemicals down the sink can cause environmental pollution and damage to plumbing systems, so it is not always appropriate.

Answer:

1. Wash your hands.
2. No.