Colored Milk Lab

  

The night before class, I watched the video of the milk in motion lab online. In class my partner and I came up with a two part hypothesis. The first part of our hypothesis was that the dish soap is a type of degreaser, so it attacks the fat of the milk. The second part of the hypothesis was that milk is an acid so it reacts with dish soap because it is a base.

 

            To test this two part hypothesis, we created two different experiments. In the first experiment we placed 10 milliliters of creamer into a Petri dish and put three drops of both red and green dye, and then we placed two to three drops of dish soap. We saw that where the soap was dropped bubbles were formed in the creamer and moved the dye. We repeated this process three times and we got the same results.

 

 

            In the second experiment, we placed 10 milliliters of vinegar into a Petri dish and put 3 drops of both red and green dye, and then we placed two drops of dish soap. We repeated this process three times. Each time there was small reaction between the vinegar and the dish soap but nothing significant.

 

 

            In conclusion, the first part of the hypothesis is more accurate than the second part because the detergent reacted with the fat in the creamer and let the pigment in the dye spread throughout the creamer. But before the fat and the detergent reacted, the detergent reduced the surface tension and allowed the food coloring to move throughout the milk. Also the detergent reacted with protein in the creamer and changed the shape of the molecules and set them in motion.