Question

what separation methods is used to separate ammonium chloride from sodium chloride

Answer 1

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.