CH-451
Separation and purification
Chemistry · Secondary 3 · Easy · Separation and purification
A student wants to separate a mixture of sand and sodium chloride. Which sequence of steps should be used to obtain pure dry sodium chloride?
- Filter, then wash residue with water and dry it.
- Add water, filter, wash residue and dry it.
- Add water, filter, then evaporate the filtrate to dryness.
- Evaporate mixture to dryness, then filter.
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