Heat the mixture. Ammonium chloride sublimes and is collected as a sublimate leaving sodium chloride and copper (II) oxide. Add water to the mixture and stir. Filter to obtain copper (II) oxide as the residue and sodium chloride solution as the filtrate. Evaporate the filtrate to saturation to obtain crystals of sodium chloride
johnmulu answered the question on February 2, 2017 at 05:22
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