CH-122
Preparing salts
Chemistry · Secondary 3 · Medium · Preparing salts
A student wants to obtain pure crystals of copper(II) sulfate from copper(II) oxide and dilute sulfuric acid. Which step must be done after filtering off the excess copper(II) oxide?
- Add more copper(II) oxide until no more dissolves.
- Cool the filtrate in an ice bath immediately.
- Heat the filtrate to evaporate some water.
- Add sodium chloride to precipitate the salt.
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