CH-1396
Separation and purification
Chemistry · Secondary 4 · Easy · Separation and purification
A mixture of sand and sodium chloride is given. A student wants to obtain pure dry sodium chloride.
Which method should be used?
Which method should be used?
- Dissolve in water, filter, then evaporate the filtrate to dryness
- Heat strongly to melt sodium chloride and pour it off
- Use a magnet to remove sodium chloride, then dry it
- Filter the dry mixture, then evaporate the residue
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