Prepared for: Mrs. Elena Gallagher
By: Anna Villanella
March 25, 2014
Oil is a nonpolar molecule. Polar molecules have charged groups or atoms. Nonpolar molecules have no charged groups or atoms. Polar molecules, like water, are good solvents for other polar molecules. This means they molecules that react with the water disperse into the water. Nonpolar molecules don’t disperse in water because nonpolar molecules and polar molecules don’t interact. How exactly can we discover the effect of emulsifiers, and what do we think will happen to the samples? The prediction is that the oil and water will not mix, but given an emulsifier, the two will mix. Emulsification means to disperse nonpolar molecules in a polar solution. An emulsifier can cause fat to disperse in water. They contain polar and nonpolar ends which makes the fat disperse in the water. The result is emulsion. In the human body the liver produces bile, which contain bile salts. These bile salts are emulsifiers that are used in the digestive tract. In the grocery store some products, like detergents and milk, contain emulsifiers. Milk has been homogenized so that fat droplets do not rise to the top if the container. The emulsifier keeps the fat droplets from clumping and separating in the milk. This requires the addition of natural emulsifiers such as phospholipids. The phosphate part of the molecule is polar and the lipid portion us nonpolar. To prepare for this experiment, one must contain three test tubes. Tube one should be marked at the one, three, and four cm. mark. Tube two should be marked at the two, three, and four cm. mark. Tube three at the one and two cm. levels. In tube one fill it to the 3 cm. mark with water and then to the 4 cm. mark with vegetable oil and shake the test tube. See the oil and water mix and immediately separate into two layers. Vegetable oil isn’t soluble in water. Let the sample settle for 5 minutes. Next is to take a sample of the