Question

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Napthalene is insoluble in water but
soluble in benzene (organic solvent
). Ammonium chloride is soluble in
water but insoluble in benzene.(a)
Add water to the mixture of
napthalene and ammonium chloride and
shake it vigorously to dissolve
ammoium chloride.(b) Filter the
mixture .Napthalene is obtained as a
residue, whereas filtrate contains
ammonium chloride .(c) Crystallize
the filtrate by heating till
saturated solution of ammonium
chloride is obtained.(d) Cool the
saturated solution to get crystals of
ammonium chloride. I. Which is more
volatile ?
​

Answer 1

Answer:

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Answer 2

Explanation:

Napthalene is insoluble in water but soluble in benzene (organic solvent). Ammonium chloride is soluble in water but insoluble in benzene. Napthalene changes into vapours at room temperature whereas ammonium chloride changes into vapours on heating.

Method :

(a) Add water to the mixture and shake it vigorously to dissolve ammonium chloride.

(b) Filter the mixture. Napthalene is obtained as residue whereas, filtrate contains ammonium chloride. Crystallize the filtrate by heating till saturated solution of ammonium chloride is obtained.

(c) Cool the hot saturated solution to get crystals of ammonium chloride.