OCR GCSE Chemistry A · J248
Specification PAG 7 · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
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GCSE Chemistry · key term
An insoluble reactant added in more than the amount needed to react completely, so that some remains and can be filtered off.
Used by OCR
Specification PAG 7 · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
For each step in a salt-making method, explain its purpose: excess insoluble solid uses up the acid, filtration removes that excess solid, and crystallisation separates the dissolved salt from water.
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