CH-1129
Preparing salts
Chemistry · Secondary 4 · Hard · Preparing salts
A student reacts excess magnesium with dilute hydrochloric acid to prepare a pure sample of magnesium chloride crystals.
Which pair of reagents and method is correct?
Reagents: magnesium and dilute hydrochloric acid
Method: ?
Which pair of reagents and method is correct?
Reagents: magnesium and dilute hydrochloric acid
Method: ?
- Add excess magnesium, filter, then evaporate and crystallise the filtrate
- Mix equal volumes of magnesium and hydrochloric acid, then filter and dry the residue
- Titrate magnesium solution with hydrochloric acid, then evaporate to dryness
- Add excess hydrochloric acid, filter, then wash and dry the residue
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