Question

this is the procedure of melting point experiment

( preparation acetanilid) I want the summarize of this procedure

EXPERIMENTAL PROCEDURE Measure 0.100 to 0.125 g of aniline (in dropper bottles near the balances) into a tared reaction tube from the microscale kit and record the weight to the nearest milligram. Add 2 mL of distilled water and 6 to 7 drops (an excess amount, 21 drops =1 mL) of acetic anhydride. Stir the mixture for about 4 minutes untiha solid forms. Chill the reaction tube in ice water for about 5 minutes. Collect the solid by using the microscale Hirsch funnel (See Williamson, p. 73 Procedure B). Rinse the solid out of the reaction tube using a small portion of ice-cold watér and scrape with the spatula. Allow the solid to dry on a paper towel and weigh to obtain the crude yield of acetanilide. Record the appearance of the material. Save a small amount of the crude product for a melting point determination. The crude material is transferred to a clean reaction tube for recrystallization. Add 1 mL of hot water and stir to dissolve in a hot water bath. Add more water in 1 mL increments until all solid dissolves. If there are insoluble impurities, remove them with hot gravity filtration (Williamson p. 69 Procedure B). Set the tube aside to cool to room temperature for 3-5 minutes and then chill in an ice bath for 10-15 minutes. Collect the product by vacuum filtration using the microscale Hirsch funnel. Use a small amount of ice cold water, if necessary, to remove all solid from the reaction tube.

Answer 1

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