Chemistry 5070 · O Level · Separation and purification

Separation and purification — practice question

A laboratory contains a powdered blend of solid iodine and solid carbon. Iodine is very soluble in hexane and only slightly soluble in water. Carbon is insoluble in both solvents. One portion of the mixture is shaken with hexane. This is $X$. A different portion of the mixture is shaken with water. This is $Y$. Which procedure is used to obtain a pure sample of iodine?

  • A$X$ is distilled and the distillate is evaporated to dryness.
  • B$X$ is filtered and the filtrate is allowed to evaporate to dryness.
  • C$X$ is filtered and the residue is allowed to evaporate to dryness.
  • D$Y$ is distilled and the distillate is evaporated to dryness.

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