Properties of Some Triglycerides
The formulas of three triglycerides, A, B & C, are shown below, with their fatty acid components specified by name. The formulas of the fatty acid components and two useful analytical procedures are described below.
| Arachidic Acid
CH3(CH2)18CO2H Stearic Acid CH3(CH2)16CO2H Lauric Acid CH3(CH2)10CO2H Palmitoleic Acid CH3(CH2)5CH=CH(CH2)7CO2H Oleic Acid CH3(CH2)7CH=CH(CH2)7CO2H Linoleic Acid CH3(CH2)4CH=CHCH2CH=CH(CH2)7CO2H |
Saponification Value: A measure of the molar concentration of ester functions. The mg of KOH required to completely saponify (hydrolyze) one gram of triglyceride. (Also called the "saponification number".) Iodine Value: A measure of unsaturation. The grams of iodine consumed by 100 grams of triglyceride. In practice ICl is used, since iodine does not add completely to double bonds. However, the calculation gives results equivalent to iodine addition. (Also called the "iodine number".) |
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1.Which has the largest
saponification value? ... 2.Which has the largest iodine value? ............ 3.Which if any is chiral? (enter "X" for none) ... Enter letter(s) corresponding to your selections, in each answer
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