In water, calcium carbonate is insoluble, but sodium chloride is soluble. What sequence of steps would you use to isolate a pure, dry sample of calcium carbonate from a mixture containing calcium carbonate and aqueous sodium chloride?
- Afilter → dry the residue with filter paper → wash the residue with water
- Bfilter → heat the filtrate to crystallising point → leave the filtrate to cool and crystallise
- Cfilter → wash the filtrate with water → dry the filtrate
- Dfilter → wash the residue with water → dry the residue