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  • Separating Sodium Chloride and Iodine: Sublimation Explained
    The most suitable method for separating a mixture of sodium chloride (table salt) and iodine is sublimation. Here's why:

    * Sublimation: Iodine has a unique property where it transitions directly from a solid to a gas (sublimes) when heated. Sodium chloride, on the other hand, has a much higher melting point and will not sublimate at the same temperature.

    How it works:

    1. Heat the mixture: Gently heat the mixture in a suitable container. The iodine will sublimate, turning into a purple vapor.

    2. Collect the iodine: The iodine vapor can be collected on a cool surface, where it will condense back into solid iodine crystals.

    3. Remaining salt: The sodium chloride will remain behind in the original container.

    Other methods to consider, but less ideal:

    * Distillation: This method could be used, but iodine is somewhat soluble in water, so some iodine would remain in the water during distillation.

    * Filtration: This method wouldn't work effectively because both sodium chloride and iodine are solids.

    Sublimation is the most efficient and reliable way to separate these two substances.

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