How can crystals of a pure salt be obtained from dilute sulfuric acid?
- Aadd an excess of aqueous sodium hydroxide, filter, evaporate the filtrate to crystallisation point
- Badd an excess of copper(II) carbonate, filter, evaporate the filtrate to dryness
- Cadd an excess of copper metal, filter, evaporate the filtrate to crystallisation point
- Dadd an excess of zinc oxide, filter, evaporate the filtrate to crystallisation point