CH-96
Preparing salts
Chemistry · Secondary 3 · Hard · Preparing salts
A student wants to prepare a pure, dry sample of magnesium sulfate crystals, , starting from dilute sulfuric acid and solid magnesium carbonate. Which final step will give crystals of magnesium sulfate?
- Filter the mixture and dry the filtrate with filter paper.
- Filter to remove excess solid, then evaporate the filtrate to dryness.
- Filter to remove excess solid, warm the filtrate to concentrate it, then cool to crystallise.
- Distil the filtrate to obtain crystals directly in the distillate.
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