CH-367
Separation and purification
Chemistry · Secondary 3 · Easy · Separation and purification
A student wants to obtain dry samples of sand and sodium chloride from a mixture of the two. Which sequence of methods should be used?
- Add water, filter, evaporate filtrate to dryness.
- Add water, evaporate mixture to dryness, filter.
- Filter the dry mixture, then evaporate the residue.
- Evaporate the dry mixture, then add water and filter.
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