Question

Suggest separation technique (s) one would need to employ to separate the following mixtures. (a) kerosene oil , water and salt (b) common salt , water and sand (c) potassium chloride and ammonium chloride​

Answer 1

Answer:- (a) Separation can be done with a separating funnel. Mercury being heavy forms lower layer.

(b) Sublimation can be used. Ammonium chloride sublimes.

(c ) Filtration followed by crystallisation techniques can be used here. Sand can be removed as an insoluble residue upon filtration. Upon evaporating the filtrate in a china dish to about one third followed by slow colling crystals of common salt (NaCl) are formed.

(d) Kerosene oil can be separated with a separating funnel. What and salt can be separated either by distillation (water distils) or by evaporation (water evaporates). Salt is left behind as residue.