Experiment 9 - PROPERTIES OF FATS AND OILS Flashcards
are esters formed from the higher fatty acids (C12 – C22) and glycerols
Fats (are solids) and Oils (are liquids)
are the most widely occurring lipids
Animal fats and vegetable oils
Acrolein Test:
Heat 2 to 3 drops of coconut oil with about 0.5 gram of potassium bisulfite in an evaporating dish. Note the odor.
Observations?
After wafting the vapors close to her nose, the instructor was able to smell what she described as a “burning fat” smell. This denotes the presence of acrolein, which comes from the oxidation of unsaturated fatty acids, like in coconut oil.
equation for the acrolein test?
CH3CH=CH2 + O2 → CH2=CHCHO + H2O
Heat 2 to 3 drops of glycerol with about 0.5 gram of potassium bisulfite in an evaporating dish. Note the odor.
Observations?
After wafting the heated mixture’s vapor, the instructor was able smell the same burning fat smell like. This is a positive indiciation of the presence of acrolein in the glycerol.
equation for the glycerol test?
(CH2OH)2CHOH → CH2=CHCHO + 2 H2O
Which oil absorbed more alcoholic iodine solution?
Linseed oil absorbs more alcoholic iodine solution. Being high in unsaturated fatty acids, it makes it easier to react with and form iodine compounds.
Which oil is unsaturated?
The linseed oil is unsaturated. This means that it contains more double bonds between carbon atoms. This allows unsaturated fats to remain liquid at room temperature while saturated fats like coconut oil become solid.
Differentiate Fats and Oils.
Fats and oils are made up of chains of fatty acids. Saturated fatty acids are the main components used to compose the fats. Meanwhile, oils are mainly comprised of unsaturated fatty acids.
Fats are typically found in animals and become solid at room temperature, while oils can be found in plants and remain liquid at room temperature.
What kind of fat is considered good for the body, saturated fat or unsaturated fat? Why?
Unsaturated fats are better for the body. Unsaturated fats, which are liquid at room temperature, are considered beneficial fats because they can improve blood cholesterol levels, ease inflammation, stabilize heart rhythms, and play a number of other beneficial roles.
are lipids (waxy fats) that give your body energy. Your body makes these and also gets them from the foods you eat.
Triglycerides
are the building blocks of the fat in our bodies, and in the food we eat. During digestion, the body breaks down fats into this, which can then be absorbed into the blood. Their molecules are usually joined together in groups of three, forming a molecule called a triglyceride
Fatty acids
are fatty compounds that perform a variety of functions in your body. They’re part of your cell membranes and help control what goes in and out of your cells. They help with moving and storing energy, absorbing vitamins, and making hormones.
Lipids
a naturally occurring alcohol. It is an odorless liquid used as a solvent, sweetening agent, and medicine.
When this is in the intestines, it attracts water into the gut, softening stools and relieving constipation. When it is in the blood, it attracts water so that the water stays in the body longer.
glycerol
Rancidification Process
Initiation
Termination
Propagation
