Creating an Invisible Fire Extinguisher with Chemistry

Next Generation Science

This video demonstrates a classic science experiment that illustrates evidence of a chemical change and the properties of carbon dioxide gas. Using common household items—vinegar and bicarbonate soda (baking soda)—the presenter creates a chemical reaction inside a beaker. The video clearly visualizes the immediate reaction, characterized by rapid foaming and bubbling, which serves as a primary indicator that a chemical change is occurring. The second half of the video explores the invisible byproduct of this reaction: carbon dioxide gas. The presenter performs a fascinating demonstration by "pouring" the invisible gas over lit tea light candles. Although no liquid touches the flames, the candles are extinguished one by one. This powerful visual helps students understand that gases are matter, have mass, and can displace other gases like oxygen. For educators, this video serves as an excellent hook for units on matter, chemical reactions, or fire safety. It provides a safe, clear visualization of concepts that are often abstract, such as the existence and behavior of invisible gases. The clear text overlays and narration make it accessible for upper elementary and middle school students to grasp the connection between chemical changes and the formation of new substances.