Experiment
Color Changing Milk GROUP 220 DAENNA GONZALEZ EIMY MENDOZA DANIELA CARVAJAL VERONICA GLORIA
ANETTE SALAZAR ELIUD GUERRERO ERSAEL SANCHEZ ESTEFANIA COLLADO
Science experiments help us grow through experimenting and exploring we are able to ask questions, make assumptions, and then seek solutions. Purpose: -The main purpose of this experiment is to figure out how milk reacts when making contact with the dish soap.
Hypotesis - We think if we put some milk in a dinner plate, pour some food coloring and put a swab with liquid soap, then the food coloring in the milk would expand and start moving to all directions because the soap makes a big chemical reaction with the milk which makes the particles of the milk go crazy.
EXPERIMENT
Materials: • Milk • A plate • Food coloring • Dish soap • A cotton swab
Process
How does it works?
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 in the chemistry of that tiny drop of soap. Like other oils, milk fat is a nonpolar molecule and that means it doesn’t dissolve in water.
When soap is mixed in, however, the non-polar (hydrophobic) portion of micelles (molecular soap structures in solution) break up and collect the non-polar fat molecules. Then the polar surface of the micelle (hydrophilic) connects to a polar water molecule with the fat held inside the soap micelle. Thanks to the soap connection, literally, the non-polar fat can then be carried by the polar water. This is when the fun begins.
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. This is why milk with a higher fat content produces a better explosion of color—there’s just more fat to combine with all of those soap molecules.
Soap has a bipolar characteristic. It has one polar end and one non polar end. When soap is used for cleaning, it allows insoluble particles to become soluble in water and then be rinsed away. Here, milk has fat contents and water. When a drop of liquid soap or shampoo is added to the milk, the insoluble fat molecules (present in milk) become associated inside micelles, tiny spheres formed from soap molecules with polar hydrophilic (water-attracting) groups on the outside and encasing a lipophilic (fat-attracting) pocket, which shields the fat molecules from the water (and milk) making it soluble. These fat molecules are so tiny that we can’t see those with naked eyes. When we added food color in milk, the molecules of food colors also move with fat molecules and we can see the chemical reaction through the movement of food color.
Academic benefits for the future users of the didactic model This experiment can help us to understand much better the reaction between the polar and non-polar substances, the definition and physical characteristics of a micelle and its function, the detergents chemical purpose and the properties of the fat and the water and how micelles act to make them “collision” or carry out a process being together, without care if they are ”incompatibles”. Finally, talking about chemical definitions, this can help us to understand the composition of micelles, the molecules role, the solubility of determined substances and chemical reactions by a funny way.
Conclusion What we can conclude about this experiment is that the entire process is very fast and it displays as scattering of food colors almost as beautiful explosion of colors, which leave us learning about chemical concepts, as like the lipophilic, hydrophilic, polar and non-polar bonding, micelles, etc. This experiment is able to make us to understand chemical processes and reactions by a funnier way and that can let us learn better and understand some complicated chemistry concepts by a simpler way.