Answer to Question #53089 in Analytical Chemistry for rmachris

Question

what is the best method to purify iodine?

Answer 1

The best method to purify iodine is sublimation. On heating at atmospheric pressure iodine sublimes, transformed into a purple vapour; under cooling, at atmospheric pressure, iodine vapor crystallizes, bypassing the liquid state. This is used in practice for the purification of iodine from the non-volatile impurities.