CH-489
Separation and purification
Chemistry · Secondary 3 · Medium · Separation and purification
A solution contains only sodium chloride and sand. Which method will best obtain pure, dry sodium chloride crystals from the mixture?
- Filter, then evaporate the filtrate to crystallisation
- Distil the mixture and collect the first distillate
- Use a magnet, then evaporate to dryness
- Decant the liquid and dry the residue in an oven
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