Question on: JAMB Chemistry - 2019
Which of the following sets of operation will completely separate a mixture of sodium chloride, sand and iodine?
A
addition of water, filtration, evaporation to dryness and sublimation
B
filtration, evaporation to dryness, addition of water and sublimation
C
sublimation, filtration, evaporation and addition of water
D
sublimation, addition of water, filtration and evaporation to dryness
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Correct Option: A
The Process involves:
- Add water to the mixture and filter it. This will result in a salt solution as the filtrate; a mixture of iodine and sand as the residue.
- Evaporate the filtrate to dryness to get sodium chloride (salt).
- Heat the residue to sublime the iodine from the sand.
That is,
Addition of water \(\to\) Filtration \(\to\) Evaporation \(\to\) Sublimation.
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