Milk in Motion Lab
Today, after learning about the EXTREMELY confusing grading policy, we proceeded into a lab to figure out why milk interacts with food coloring and dish soap as it did during the video we saw.
Procedure:
1. Pour milk into Petri dish
2. Add a few drops of food coloring evenly spaced out on the milk DO NOT MIX
3. add dish soap in the middle of the milk and food coloring
4. PROFIT FROM THE RESULTS
So what happened?
THAT'S A VERY GOOD QUESTION MR. QUICK. As we saw in the video and the experiments we did, after the dish soap, we learn that the dish soap has a quality that is able to break up fat molecules by surrounding individual molecules and breaking the intermolecular forces between each molecules in the fats in the milk. This causes the surface tension of the milk to lower drastically because the cohesion between the lipids in the milk is decimated. Before the soap is applied, the food coloring is able to sit on top of the milk because the surface tension of the milk was still strong; however, when the dish soap was introduced, the nonpolar side of the soap molecule attached to the water molecules and the nonpolar side of the molecule attached and surrounded the fats and proteins in the milk.
WHAT AN INTERESTING CLASS.
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