Im confused How could crystals of a pure salt be prepared from dilute
sulfuric acid?
A add an excess of aqueous sodium hydroxide, filter, evapora
the filtrate to crystallisation point
B add an excess of copper (II) carbonate, filter, evaporate the
Tholunte
filtrate to dryness
copper sulfate
C add an excess of copper metal, filter, evaporate the filtrate
crystallisation point
add an excess of zinc oxide, filter, evaporate the filtrate to
crystallisation point

Soluble
insoluble​