Which safety measure is essential when working with strong acid or base stock solutions?

Performing procedures involving strong acid or base stock solutions in a fume hood is essential for several reasons. Fume hoods are designed to protect laboratory personnel from exposure to hazardous fumes, vapors, or dust that may be released during the handling of these corrosive substances. Strong acids and bases can emit harmful vapors that pose health risks, including respiratory irritation or chemical burns upon contact. A fume hood offers a controlled environment that allows for safe ventilation of these fumes, minimizing the risk of inhalation or exposure to harmful chemicals.

Additionally, working within a fume hood ensures that any spills or splashes are contained within the hood, reducing the likelihood of contaminating the surrounding area and protecting both the individual working and other laboratory personnel from potential harm. Other protective measures, such as using gloves, are important for direct contact prevention, but they do not address the larger issue of air quality and exposure control that a fume hood provides.