Question

The teacher asks Humaira to separate a mixture of iron filings, sand and iodine. How can she do that?

Answer 1

• At first use the magnet to remove the iron - On a level surface, spread the iodine, sand, and iron mixture. Wrap a paper towel around the magnet. By moving the magnet across the surface of the mixture, you may remove the iron.
• To collect the filings, remove the paper towel from the magnet.
• The process of sublimation separates the iodine and sand mixture.
• When iodine and sand are heated together, the iodine sublimates and the sand remains.
• In this way, Humaira can separate the mixture of iron fillings, sand, and iodine.