Question

Draw labelled diagrams of the following:

To show the separation of a mixture of common salt and ammonium chloride by sublimation.

Answer 1

• The method for the separation of a mixture of common salt and ammonium chloride is sublimation.
• In this ammonium chloride is a sublimable substance while NaCl(common salt) is a non-sublimable substance.
• Procedure for separation is as follows:
• Take a mixture of common salt and ammonium chloride in a china dish.
• The mixture is put on a burner then.
• Cover the china dish with an inverted glass funnel.
• On the open end of the funnel place a cotton plug so as to prevent vapors from escaping.
• Then the burner is made on.
• Vapors of ammonium chloride are formed. On rising these vapors get condensed.
• Ammonium chloride in the form of a white solid is obtained.
• Common salt remains in the china dish.

Fig: Separation of a mixture of common salt and ammonium chloride