CH-107
Preparing salts
Chemistry · Secondary 3 · Medium · Preparing salts
A student wants to obtain pure crystals of copper(II) sulfate from a solution of copper(II) sulfate in water. Which sequence of steps should be used?
- Filter the solution, then heat to dryness
- Heat to concentrate the solution, then cool to crystallise
- Cool the solution, then filter off the crystals and wash with hot water
- Evaporate to dryness, then add cold water to form crystals
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