How can you separate mixture of gunpowder?
Gunpowder is a mixture of nitre (potassium nitrate) , sulphur
Name of the method- filteration , evaporation and solvent
1) Put the constituents in water. nitre will dissolve in
2) Filter the soln.
Residue - sulphur+charcoal
3) Perform evaporation on the filterate.
Water will evaporate leaving nitre.
4) Put the residue in carbon disulphide.
Sulphur will dissolve in this soln.
5) Filter the soln.
6) Perform evaporation on the filterate.
carbon disulphide evaporates leaving sulphur.
in the form of a paragraph:-
Answer: Gunpowder is a mixture of sulphur, charcoal and
potassium nitrate (nitre). When water is added to the mixture
potassium nitrate dissolves. The mixture is then filtered. The
filtrate is potassium nitrate solution while the residue is a
mixture of sulphur and charcoal. The filtrate is evaporated on a
sand bath to obtain nitre back. When carbon disulphide is added to
the residue, sulphur dissolves. When this mixture is filtered the
filtrate is sulphur solution while the residue is charcoal. Leaving
it open evaporates the sulphur solution. Carbon disulphide
evaporates and sulphur crystals are left behind.