Question

Describe how you would separate a mixture of chalk powder iron fillings iodine and sodium chloride in the laboratory

Answer 1

first use magnet to separate iron fillings then add water, chalk powder will float, separate it by filtration then evaporate water to get NaCl

Answer 2

Firstly use a magnet, it will separate the iron fillings. Then add water, iodine and sodium chloride will mix in it but the chalk powder will be floating. To separate sodium chloride and iodine the best way is to slightly heat the mixture. The dark purple vapors of iodine can be collected and cooled to give solid iodine. During this process the sodium chloride is not affected and hence this is the perfect way of separating the two. Then heat up the salt and water mixture. The water will evaporate into vapors and the residue salt( sodium chloride) will be left.