Ammonia Fountain Experiment - Chemistry Demonstration Explained #265162 (License: Personal Use)

This line drawing illustrates the ammonia fountain experiment, where a flask filled with ammonia gas is inverted over a beaker of water. Upon introducing a small amount of water via the pipette, the highly soluble ammonia dissolves, drastically reducing internal pressure and causing atmospheric pressure to push water up the tube in a fountain-like jet. The apparatus includes a stopper with two tubes-one for gas entry and one for the fountain-and a rubber bulb for initiating flow.

Used in high school or undergraduate chemistry labs to demonstrate gas solubility, partial pressure, and ideal gas behavior; often paired with lessons on Le Chatelier’s principle and Henry’s law. Matches user intent for educational diagrams, lab procedure references, or science illustration resources.