Why is it important to care when making rubber to glass connections in the laboratory?

• A. It prevents corrosion
• B. It improves reaction speed
• C. It increases accuracy
• D. The glass can't break and cause injury

Answer: (D)

Safety is the focus when connecting rubber to glass. Glass joints are fragile, and if the connection is forced, poorly seated, or subjected to pressure or heat, the glass can crack or break, and a poor seal can leak or spray hot or hazardous liquids. By ensuring a proper fit, using compatible materials, keeping joints clean and crack-free, and securing connections, you reduce the risk of injury from shattered glass or exposure to chemicals. The other options don’t address the real danger here—breakage and spills—so the main concern is preventing physical injury and accidents from a compromised connection.