Which of the following is the proper procedure for cleaning up an acid spill in the laboratory?

• A. Absorb the acid with paper towels and dispose of them in the regular trash.
• B. Neutralize the acid with a suitable base, such as sodium bicarbonate, then clean the area with water.
• C. Cover the spill with sand and sweep it into a sink.
• D. Dilute the acid with large amounts of water and leave it to evaporate.

Answer: (B)

Verified step by step guidance

1. Understand that cleaning up an acid spill requires neutralizing the acid to make it safe before disposal or further cleaning.
2. Identify a suitable neutralizing agent, such as sodium bicarbonate (NaHCO\_3), which reacts with the acid to form water, carbon dioxide, and a salt.
3. Apply the neutralizing agent carefully to the acid spill until the reaction ceases (no more fizzing or bubbling), indicating neutralization is complete.
4. After neutralization, clean the area thoroughly with plenty of water to remove any remaining residues.
5. Dispose of the neutralized material according to your laboratory's safety protocols, never disposing of acid or neutralized acid directly into regular trash or sinks without proper treatment.