Question

Explain the methods required for the separation of the following mixtures.

iron filing, sand, and iodine

Answer 1

Methods of separation - Magnetic separation, sublimation

• At first, the magnet is moved through this mixture, and iron filings cling to it and separate. The only things left in the mixture are sand and Iodine.
• Sublimation is the process of converting a solid directly into a gas without converting it into a liquid state.
• Iodine has the tendency to sublimate.
• Now, take the mixture of sand and iodine, into a china dish, put it above a bunsen burner, and insert an inverted flask over it.
• Heat the mixture gently, after some time, iodine will sublimate and get condensed on the inverted flask.
• While sand will remain behind on the china dish.
• That's how, a mixture of iron filling, sand and iodine can be separated.