How Do You Test For Iodine Number In Stearic Acid?
The iodine value is a measure of the unsaturation of fatty acids and is expressed in terms of the number of centigrams of iodine absorbed per gram of sample (percent iodine absorbed). Iodine number test is applicable to all normal fatter acids. Stearic acid belongs to this class of fatty acids. Read on to learn how to test for iodine in stearic acid. Collect all the apparatus and reagents so that you will have them handy when you begin the test. Clean the glassware and dry it in a mid-temperature oven. Heat the hot plate to a temperature of 50 to 60-degrees Fahrenheit (10 to 15-degrees centigrade). Place the stearic acid sample on the hot plate and melt it. Pour 20 ml of carbon tetrachloride into a 500 ml Erlenmeyer flask. Weigh the stearic acid sample and add it to the same Erlenmeyer flask. Pipet 25 ml of the Wijs solution into the flask. Stopper the flask and swirl it to insure a thorough mixture. Prepare and conduct at least 2 blank determinations with each group of samples simulta
