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Gunpowder is a mixture of nitre (potassium nitrate) , sulphur and charcoal
Name of the method- filteration , evaporation and solvent extraction.
Steps-
1) Put the constituents in water. nitre will dissolve in water.
2) Filter the soln.
Filterate- water+nitre
Residue - sulphur+charcoal
3) Perform evaporation on the filterate.
Water will evaporate leaving nitre.
Solvent extraction-
4) Put the residue in carbon disulphide.
Sulphur will dissolve in this soln.
5) Filter the soln.
Filterate-carbon disulphide+sulphur
Residue- charcoal
6) Perform evaporation on the filterate.
carbon disulphide evaporates leaving sulphur.
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