Question
Explain Van-Arkel method of refining.
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Answer
In Van-Arkel method impure metal is converted into a volatile compound which is decomposed electrically to get the pure metal. For example,
$Ti _{(s)}+2 I _{2(g)} \xrightarrow{523 K} TiI _{4(g)} \xrightarrow{1700 K} Ti _{(s)}+2 I _{2(g)}$
$Ti _{(s)}+2 I _{2(g)} \xrightarrow{523 K} TiI _{4(g)} \xrightarrow{1700 K} Ti _{(s)}+2 I _{2(g)}$
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