CH-127
Preparing salts
Chemistry · Secondary 3 · Medium · Preparing salts
A student wants to prepare pure dry crystals of copper(II) sulfate from dilute sulfuric acid and excess copper(II) oxide powder. Which step should be done immediately after filtering off the excess copper(II) oxide?
- Cool the filtrate to allow crystals to form directly.
- Heat the filtrate to evaporate some water.
- Wash the filtrate with distilled water.
- Add more copper(II) oxide to the filtrate.
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