When is iodine violet, and when is it brown?

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When is iodine violet, and when is it brown?
Violet: solid, vapour, nonpolar solvents



Brown: some polar solvents.



Iodine is often dissolved along with potassium iodide in water. The solution is brown, and the iodine is actually bonded to the iodide, to make the I3 - anion.
Reply:It remains brown when there is no starch and it turns blue-black when there is starch.
Reply:Paul B is right.



It is purple in its pure form. In an aqueous solution is when it turns brown.



Much like copper is bronze when its solid, but is blue when in solution.



The other guy is also kind of right, it reacts with starch to turn a dark, dark blue (but not purple)
Reply:Iodine = Violet

Iodide = Brown
Reply:Iodine Solutions in chloroform, carbon tetrachloride, and carbon disulfide are violet.Aqueous and ethanol solutions are brown.