A sample equation would be Next 18 Sep This academia was first published 25 Sep and last revised 13 Feb This chapter introduces representative lipids of each type, with emphasis on their chemical structure and physical properties.
It involves hydrogenation, the process of adding hydrogen across the double bond of unsaturated fatty acids to produce the saturated counterpart. This difference was how much liquid was dispensed.
Different foods contain different proportions of these three groups of lipids. However, my accuracy turned out to be very high, as my error was very low.
My accuracy was also high, as my error was only 0. My accuracy was very high, but my precision was not quite as good.
Note that the three ester groups are the polar part of the molecule, whereas the tails of the fatty acids are nonpolar. When all three of the alcohol groups form ester linkages with fatty acids, the resulting compound is a triacylglycerol; an older name for this type of compound is triglyceride.
Also, I may have gotten finger prints on the flask, which would have added a slight bit of extra weight that could throw my calculations off. A precision of In terms of chemistry, lipids are a mixed bag of compounds that share some properties based on structural similarities, mainly a preponderance of nonpolar groups.
Classified according to their chemical nature, lipids fall into two main groups. Finally to find the error, I found the absoulte value of my measured density minus the actual density. To find the average density, I added the three densities I found, then divided that total by three to find the average.
They are found in places as diverse as egg yolks and the human nervous system and are an important component of plant, animal, and microbial membranes. Fats and oils are the principal stored forms of energy in many organisms.
Triacylglycerols do not occur as components of membranes as do other types of lipidsbut they accumulate in adipose tissue primarily fat cells and provide a means of storing fatty acids, particularly in animals.
This same method was used to find the volume of water in the flask.
And also for the students to understand deeply through personal experience and could conclude whether it is positively or negatively present according to the corresponding results.
With my data, my equation for the water was 0. I subtracted the intial amount of liquid in the buret from the final amount of liquid in the buret. Complex lipids also contain fatty acids, but their alcohol may be either glycerol or sphingosine.
Lipids are marginally soluble at best in water but readily soluble in organic solvents, such as chloroform or acetone. An important representative of this group is lecithin, a glycerophospholipid, containing fatty acids, glycerol, phosphate, and choline.
Precision was found by taking the absolute value of the highest density minus the lowest density, dividing that difference by the average density, and then multiplying that answer by The following statements are the objectives of this experiment: The defi nition of a lipid is based on solubility.
One group, which consists of open-chain compounds with polar head groups and long nonpolar tails, includes fatty acids, triacylglycerols, sphingolipids, phosphoacylglycerols, and glycolipids.
Phospholipids and sterols are major structural elements of biological membranes. Conversion of oils to fats is a commercially important process. For example, the precision for the water was found by this equation: The only common property they have is their insolubility in water.
Fats and oils are typical lipids in terms of their solubility, but that fact does not really define their chemical nature. The second major group consists of fusedring compounds, the steroids; an important representative of this group is cholesterol.
Structurally, cholesterol contains the steroid nucleus that is the common core of all steroids: In order to find the density, I simply divided the mass found by the volume found.
Fats are triglycerides, esters of fatty acids and glycerol.Spectrophotometry Lab Report Instructions for the final laboratory report Your Full Name Cebu Institute of Technology - University [email protected] Abstract The abstract should have a maximum of words and should briefly state the problem, method, and the summary of the lab report Lab reports can be computerized or.
IB Chemistry - Internal Assessment Lab Format The following titles and subtitles should be used for your lab report and given in this order within your lab report.
Use the following sheet as a checklist when writing lab reports. Each lab report may focus on different sections so be sure that you are focusing on the section(s) that the lab is addressing. Los Angeles City College Chemistry 51 Fall observe the bottom of the meniscus).
Re-weigh the graduated cylinder now containing alcohol. Record the weight of alcohol then calculate the density of the alcohol using the equation, d = m/V. lab report lipid 1.
experiment of lipiddr.
rosmilah binti misnanumi abibah bt sulaiman dsiti rahayu bt mohamed noor dazma amira bt mohamad dnur afiqah bt muhamad apandi dameera bt yahya. For example, a person might write the following] In this experiment, correct methods for using an analytical and top-loading balance, as well as finding the density of an unknown solution by using a pipet and buret, will be investigated.
Here is an excellent example of how to write an unknown lab report in Microbiology class. Please note that due to formatting issues the flow charts had to be removed.Download