With the help of labelled diagram explain the separation of ammonium chloride and sand.
Answers
Ammonium chloride sublime and can be separated from the mixture of salt and sand by the process of sublimation.
Answer:
(a) Ammonium chloride changes directly from solid gaseous on heating . So to separate mixtures containing a sublimable volatile component from a non-sublimable impurity i.e., sodium chloride, the sublimation process is used.
• Place the china dish over a wire gauze placed over a tripod stand.
• Cover the china dish with an inverted glass funnel and plug in a little cotton at the opening stem.
• On heating the mixture, white fumes evolve.
• Stop heating when the fumes stop rising and allow the funnel to cool.
• On cooling, remove the funnel and transfer the solid ammonium chloride sticking on the walls of funnel to a watch glass.
Explanation: