Laboratory 28: Properties of Lipids Procedure A. Lipid Extraction 1. Perform the extraction part of the test on the rst day of lab, and the solubility tests, reaction with bromine, and acrolein tests on day two of the lab. 2. Choose either peanuts, chocolate chips, potatoe chips or sun ower seeds to perform the extraction on. 3.
All of these substances belong to the diverse class of biological compounds called lipids. What are lipids and what role do they play in our body chemistry? In this three-part student laboratory kit, students first examine the solubility of lipids and use Sudan III—a special “fat stain”—to identify lipids.
Lab 5 – Properties of Lipids Ryan Fiter 23/Oct/2013 Objective The goal of this lab is to gain an understanding of the properties of lipids. Properties that will be investigated include solubility, greasiness and chemical reactivity. Reactions performed to test reactivity include emulsification, saponification and iodine absorption.
View Notes - Lab # 7 - Lipds from BIOLOGY 120 at New York Institute of Technology, Westbury. Biochemistry Lab # 7 Introduction to properties of lipids Nahima Hoque April 12th, 2011 Station 1: Grease
Vocabulary to know Post Lab questions: Post lab Question: Intro What is a Lipid? Each substance had a lower dark orange layer and an upper yellow layer. Initial appearance of substances after adding bromine water: What substances that you tested were unsaturated (had
Conclusion: The different test performed in the lipids determined some of its properties. Solubility test determined that lipids are largely non-polar(since they only dissolved or mixed with non-polar substances e.g. ether, benzene, chloroform) thus they tend dissolve in non-polar substances also.
Lipids are used by organisms for energy storage, as a signalling molecule (e.g., steroid hormones), as intracellular messengers, and as a structural component of cell membranes.The fat-soluble vitamins (A, D, E, and K) are isoprene-based lipids that are stored in the liver and fat.
LIPIDS LAB. POST-LAB QUESTIONS: 1. How can you tell that the dark spot on the paper towel is fat and not water? 2. Rank from most to least the percentage of lipid extracted from all three foods. 3. Determine which lipids contained saturated and unsaturated fatty acids in this experiment based on your descriptions of the fats on the watch ...
the structure of the fatty acid. This is the reason that lipids containing a high percentage of saturated acids tend to be solid, but as the percentage of unsaturated fatty acids increases, the more fluid the lipid. The “kinks” in the unsaturated fatty acids keep them from packing close together, and this keeps unsaturated lipids fluid.
The Chemistry of Lipids Experiment #8 Objective To observe the solubility of lipids in polar and nonpolar solvents and to compare saturated and unsaturated fats in their chemical reaction with bromine. The percent fat in a food will be determined by extraction of the fat and weighing it. Introduction