Required Practical: Preparation of a Soluble Salt (AQA GCSE Chemistry Combined Science): Flashcards

Dissolve and remain in solution

Precipitate/form solid crystals that settle

Hydrochloric acid ($HCl$)

Copper(II) oxide ($CuO$)

Copper(II) chloride ($CuCl₂$)

Increases reaction rate

Excess $CuO$ remains undissolved

Remove unreacted excess $CuO$

Increase salt concentration

Cool solution slowly

$CuCl₂ + H₂O$

Ensures all acid neutralised

Pure crystals form as solution cools

Insoluble metal base