CH-101
Preparing salts
Chemistry · Secondary 3 · Medium · Preparing salts
A student wants to obtain pure copper(II) sulfate crystals from a mixture of excess copper(II) oxide and dilute sulfuric acid.
Which step must be carried out after filtering off the excess copper(II) oxide?
Which step must be carried out after filtering off the excess copper(II) oxide?
- Add more copper(II) oxide until no more dissolves
- Heat the filtrate to concentrate the solution
- Add sodium hydroxide solution to the filtrate
- Cool the filtrate in an ice bath immediately
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