The Surprising Organic Chemistry of Soap Bubbles

Soap molecules have a water-loving head and a water-fearing tail, perfect for forming bubbles.
The tails gather together, trapping a thin film of water between layers of soap.
This sandwich-like structure creates the delicate skin of a bubble.
Organic surfactants lower water’s surface tension, allowing bubbles to form at all.
The rainbow colors on bubbles come from light waves reflecting and interfering in the thin film.
Glycerin or sugar can be added to soap solutions to strengthen bubbles and slow evaporation.
Bubble films are only a few micrometers thick—thinner than a human hair.
The spherical shape minimizes surface area, making it the most stable form.
Soap bubbles illustrate how organic molecules organize themselves in water.
From childhood play to scientific studies, bubbles show chemistry at work in surprising ways.