A student accidentally spills a small amount of concentrated sulfuric acid on the laboratory bench. Which of the following is the most appropriate immediate action?
Show the answer and explanation
Correct answer
C. Cover the spill with sodium bicarbonate powder, then clean up and rinse the area.
Principle or equation
For acid spills, the immediate action is to neutralize with a mild base like sodium bicarbonate, then clean up and rinse. Adding water can spread the acid; using strong base can cause exothermic reaction; dry wiping may leave residue.
Why this answer is correct
Sodium bicarbonate is a mild base that reacts with sulfuric acid to produce carbon dioxide, water, and a salt, effectively neutralizing the spill. After effervescence stops, the residue can be swept up and the area rinsed with water. This is safer than using a strong base or adding water.
Example
For a hydrochloric acid spill, sprinkle sodium bicarbonate until bubbling stops, then clean up.
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