SC-822
Filtration
Lower Sec Science · Secondary 1 · Hard · Filtration
A teacher prepares a mixture of sand and common salt (sodium chloride). She wants to obtain pure dry salt.
Which sequence of methods should she use?
Which sequence of methods should she use?
- Filter the dry mixture, then evaporate the residue to dryness
- Add water and stir, filter, then evaporate the filtrate to dryness
- Add water and stir, evaporate the mixture to dryness, then filter
- Add water and stir, decant the liquid, then filter the liquid
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