Magic Colored Milk
In this animated gif, we can see what happens when a cotton bud, topped with dish-washing soap, is placed on a plate of milk containing droplets of food colouring.What happens
The liquid soap floats over the surface of the milk and attacks the fat molecules, causing it to move across the plate. As it does so, it picks up the food colouring, creating the swirling patterns: it's a truly explosion of color!How does it really work?
Milk is mostly water but it also contains vitamins, minerals, proteins, and tiny droplets of fat suspended in solution. Fats and proteins are sensitive to changes in the surrounding solution (the milk).
The secret of the bursting colors is the chemistry of that tiny drop of soap. Dish soap, because of its bipolar characteristics (nonpolar on one end and polar on the other), weakens the chemical bonds that hold the proteins and fats in solution. The soap's polar, or hydrophilic (water-loving), end dissolves in water, and its hydrophobic (water-fearing) end attaches to a fat globule in the milk.
The molecules of fat bend, roll, twist, and contort in all directions as the soap molecules race around to join up with the fat molecules. During all of this fat molecule gymnastics, the food coloring molecules are bumped and shoved everywhere, providing an easy way to observe all the invisible activity. As the soap becomes evenly mixed with the milk, the action slows down and eventually stops. Watch this video
:Color Changing Milk - Sick Science! #019
Further reading:http://chemistry.about.com/od/chemistryhowtoguide/a/magicmilk.htmGif source
:http://s3-ec.buzzfed.com/static/2013-10/enhanced/webdr02/29/17/anigif_enhanced-buzz-20060-1383083328-32.gif#chemistry #soap_in_milk #colors #animatedgif #science #sciencesunday #chemical_reactions