Sodium Iodide Test for Alkyl Chlorides and Bromides

Sodium Iodide Test for Alkyl Chlorides and Bromides 

Preparation Sign in at www.cengage.com/login to read the MSDSs for the chemicals used or produced in this procedure. 

Place 1 mL of the sodium iodide-acetone test soiution in a test tube, and add 2 drops of the chioro or bromo compound. If the compound is a solid, dissolve about 50 mg of it in a minimum voiume of acetone and add this solution to the reagent. Shake the test tube, and aiiow it to stand for 3 min at room temperature. Note whether a precipitate forms if no change occurs after 3 min. warm the mixture in a beaker of water at 50 C. After 6 min of heating, cooi the soiution to room temperature and note whether any precipitate forms. Occasionaiiy a precipitate forms immediateiy after combination of the reagents this represents a positive test only d the precipitate remains after the mixture is shaken and aiiowed to stand for 3 min. 

Carry out this reaction with a series of primary, secondary, and tertiary chio-rides and bromides. Note in aii cases the differences in reactivity as evidenced by the rate of formation of sodium bromide or sodium chioride. 

Place all solutions and solids involved in this test in the container for halogenated liquids, unless instructed to do otherwise. 

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