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The reactions below illustrate which purification technique? Ti(s) + 2I2(g) 523 Kb7b7b7b7b7b7 TiI4(g) TiI4(g) b1700 Kb7b7b7b7b7b7 Ti(s) + 2I2(g)

1. Zone refining
2. Cupellation
3. Poling
4. van Arkel method

Correct answer: van Arkel method

Solution

The van Arkel method is a purification technique that involves the formation and subsequent decomposition of a volatile compound, in this case, titanium iodide (TiI4), allowing for the separation of pure titanium from impurities.

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