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test tubes both with 5mL of distilled water and 15 drops of mineral oil. A small amount of soap was added to one of the test tubes. The other test tube was a control test tube. Theobservation of whether or not the soap allowed the water and oil to emulsify was recorded. Then, the soap solution was prepared by mixing 25mL of distilled water with a small amount of soap. The mixture was then gently warmed on the hot plate. Then five test tubes were labeled, #1 to #5. 5mL of the prepared soap solution was added to each test tube. In test tube #1, 2 drops of 5% CaCl2 was added. In test tube #2, 2 drops of 5% MgCl2 was added. In test tube #3, 2 drops of 5% FeCl3 were added. In test tube #4, 2mL of tap water was added. Test tube #5 was kept as a control test tube. The pH of test tube number 5 then was recorded using the pH paper.Data:Physical Properties of Olive Oil Vs. Grape Seed OilOur Soap (Olive Oil)Another Group’s Soap (Grape Seed Oil)Physical PropertiesLight yellowLooks like butterSlimy YellowResembles corn mashed upSolubility of Mineral Oil in Distilled Water and Soapy WaterDistilled WaterSoapy WaterSolubility (Yes/No)NoYesObservations of Each Test TubeTest TubeObservations#1White precipitate #2Cloudy#3Orange cloudy#4Clear#5Clear, pH = 10Analysis: Our soap, made from olive oil, was a thick and buttery looking. It was light yellow in color and slimy. The other group’s soap, made from grape seed oil, was a brighter yellow and resembles corn mashed up. They are similar because they formed a solid and were both a yellow color and slimy.
The primary fatty acid of olive oil is oleic acid. Below is the structure of a fatty acid as a triglyceride:The chemical equation for the saponification of olive oil: