Science Questions and Answers

Start Your Free Trial

how we can separate a mixture of ammonium chloride and sodium chloride

Expert Answers info

jerichorayel eNotes educator | Certified Educator

calendarEducator since 2012

write937 answers

starTop subjects are Science, Math, and Social Sciences

There are way in separating mixtures of chlorides salts such as that of sodium chloride and ammonium chloride. It can be done by crystallization, filtration or sublimation. The easiest method among the three is separation by sublimation. 

Ammonium chloride sublimes upon heating. Actually, the sublimation is a decomposition of ammonium chloride forming ammonia and hydrogen chloride. The reaction can be written as:

`NH_4Cl _((s)) -> NH_3_(g) + HCl_((g))`

Sodium chloride on the other hand doesn't sublime and has a higher melting point than ammonium chloride. If we want to separate the mixture, we have to heat up to 330-350 degrees Celsius and collect the gas that will be produced. 

check Approved by eNotes Editorial