A chemist needs to separate a dry solid mixture containing iron turnings, iodine crystals, and sodium chloride into its pure individual components. Arrange the following procedural steps in the correct order to achieve this separation.
- 1Pass a magnet over the dry mixture to isolate the iron turnings.
- 2Heat the remaining mixture gently under a cooled inverted funnel to sublime and condense the iodine crystals.
- 3Dissolve the remaining residue in distilled water and filter the solution to remove any insoluble impurities.
- 4Evaporate the clear filtrate to dryness to recover pure sodium chloride solid.
Answer
The correct sequence of steps is: First, pass a magnet over the dry mixture to isolate iron turnings; second, heat the remaining dry mixture under a cooled inverted funnel to sublime iodine crystals; third, dissolve the residual solid in distilled water and filter; fourth, evaporate the clear filtrate to dryness to obtain pure sodium chloride.
The correct order respects the physical states and properties of each component. Performing magnetization first isolates dry iron turnings cleanly. Controlled heating sublimates volatile iodine next. Dissolving the residue in water followed by evaporation isolates pure sodium chloride last.
Step-by-Step Solution
Key Concept
Sequential separation of solid mixtures by exploiting distinct physical properties (magnetism, volatility/sublimation, and aqueous solubility).
Estimated Time:1m 30s