CH-1105
Preparing salts
Chemistry · Secondary 4 · Medium · Preparing salts
A student wants to prepare pure, dry crystals of copper(II) sulfate from dilute sulfuric acid and copper(II) oxide.
Which method should be used?
Which method should be used?
- Add excess copper(II) oxide to warm dilute sulfuric acid, filter, then crystallise the filtrate.
- Titrate copper(II) oxide with sulfuric acid using methyl orange, then evaporate to dryness.
- Mix equal volumes of copper(II) sulfate and sulfuric acid, then cool to form crystals.
- React copper metal with copper(II) sulfate solution, then filter and dry the solid.
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