Question

describe the role of I2 in the Van arkel method of refining zirconium​

Answer 1

Answer:Iodine is heated with Zirconium to form a volatile compound which on further heating decompose to give pure zirconium. I2 helps to purify the zirconium by making compounds. - Zirconium is treated with iodine to form zirconium iodide

Explanation:Van Arkel method is used for refining Zirconium or Titanium. In this method oxygen and nitrogen, present as impurity are removed by heating metal in an evacuated vessel with iodine. The metal iodide volatize and it is decomposed on a tungsten filament, heated to about 1800K.

Answer 2

The role of $I_2$ in the Van arkel method of refining zirconium​ is formation of volatile complex.

Explanation:

Van Arkel method is used to prepare ultra pure elements by removing all the oxygen and nitrogen present as impurities in metals zirconium and titanium metals.

In this method, crude zirconium metal is heated in an evacuated vessel with iodine at high temperatures to form zirconium tetra iodide which is then decomposed over tungsten filament to give pure zirconium.

[tex]Zr(s)+2I_2(g)\rightarrow ZrI_4(g) [/tex]

$ZrI_4\rightarrow Zr(s)+2I_2(g)$

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