Experiment with milk, dyes, and liquid soap!
Milk, several drops of dye and… soap! What will happen? Find out in our experiment!
Warning! Only under adult supervision
- plate with milk;
- aluminum foil;
- food colorings;
- liquid soap;
Pour some milk into a plate. Make four strips out of several layers of aluminum foil, bend them at right angles, and set them in the milk. Drip some food coloring into the milk, then add a drop of soap right in the center. The soap spreads over the surface of the milk, forming a thin film, and the food coloring begins to spread along with it.
Why does this happen? On the one hand, the soap spreads outwards as it strives to be in contact with as much liquid (in this case, milk), and as little soap, as possible. On the other hand, due to its special molecular structure, soap tends to stay on the liquid’s surface. When the soap droplet comes into contact with the surface of the milk, it thus begins to spread out across its entire surface, pushing the food coloring outward and forming beautiful patterns.
A similar experiment is included in the MEL Chemistry subscription!