Question

what is van arkel methed

Answer 1

Ultra pure metals are being prepared by the Van Arkel Method. ... The compound so formed is then decomposed by heating to get the pure metal. Van Arkels method is used to purify crude titanium metal. It is heated with iodine to about 500K to form volatile compound.

Answer 2

Hey !!

                  VAN ARKEL METHOD        

Small amounts of very pure titanium or zirconium metal can be prepared by this method. Impure metal is heated is an evacuated vessel with I₂. Til₄ is formed which vaporizes leaving behind impurities. The gaseous MI₄ decomposes on a white hot tungsten filament.

        Zr + 2I₂(Impure) --(870K)--> Zr + 2I₂ (Pure)

        Ti + 2I₂(Impure) - (523K)--> TiI₄ + 2I₂ (Pure)

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