Gas Collection Over Water Experiment - Classic Chemistry Lab Setup #1952394 (License: Personal Use)

This black-and-white line drawing depicts a standard laboratory technique for collecting insoluble gases by water displacement. An inverted graduated cylinder is submerged in a water-filled trough, and gas generated from a reaction (e.g., zinc with acid) displaces the water inside the cylinder. Two additional glass cylinders stand nearby, likely representing alternative collection vessels or controls.

Used in high school and introductory college chemistry curricula to teach gas laws, stoichiometry, and experimental methods. Matches user intent for educational diagrams, lab manuals, or science textbook illustrations.