Required Practical: Preparation of a Soluble Salt (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards

Soluble salt

Dissolve in water

Precipitate out (form solid crystals at bottom)

Hydrochloric acid ($HCl$)

Copper(II) oxide ($CuO$)

Copper(II) chloride ($CuCl_2$)

Increases the reaction rate

Excess $CuO$ remains undissolved at bottom

Remove unreacted excess $CuO$

Solution cools slowly and crystals form

$2HCl + CuO → CuCl_2 + H_2O$

Ensures all acid is neutralised