CH-100
Preparing salts
Chemistry · Secondary 3 · Medium · Preparing salts
A student reacts excess copper(II) oxide with dilute sulfuric acid to prepare copper(II) sulfate crystals. Which step should she carry out immediately after filtering off the excess copper(II) oxide?
- Gently heat the filtrate to concentrate the solution.
- Add more copper(II) oxide until no more dissolves.
- Cool the filtrate in an ice bath immediately.
- Add sodium chloride solution to precipitate crystals.
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