Chemistry 0620 · IGCSE · Separation and purification

Separation and purification — practice question

The following details are given about solid silver chloride and solid sodium chloride. • Silver chloride and sodium chloride do not dissolve in kerosene. • Silver chloride is insoluble in water, whereas sodium chloride is soluble 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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