Chemistry 0620 · IGCSE · Separation and purification

Separation and purification — practice question

Some facts about solid silver chloride and solid sodium chloride are given below. • Silver chloride and sodium chloride do not dissolve in kerosene. • Silver chloride does not dissolve in water, whereas sodium chloride does dissolve in water. • The boiling point of silver chloride is $1547\,^\circ\text{C}$ and the boiling point of sodium chloride is $1413\,^\circ\text{C}$. What processes are used to separate a mixture of solid silver chloride and solid sodium chloride?

  • Aadd kerosene, stir and then filter
  • Badd water, stir and then filter
  • Cadd water, stir and then leave to crystallise
  • Dadd water, stir and then perform fractional distillation

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