During the sublimation process illustrated, vapors condense on the cold surface labeled X. Which substance is most likely collected at this point?
Correct answer: C. Ammonium chloride
- A. Sand
- B. Water
- C. Ammonium chloride
- D. Sodium chloride
Explanation
Ammonium chloride sublimes on heating and re-solidifies on a cold surface.
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About Experimental Techniques in Chemistry
Separation methods are selected according to differences in solubility, particle size, volatility and sublimation behaviour. Filtration and crystallisation separate insoluble or dissolved solids, sublimation isolates suitable volatile solids, distillation separates liquids by boiling point, and solvent extraction transfers a substance between immiscible solvents.
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