Chemistry 0620 · IGCSE · Separation and purification

Separation and purification — practice question

A sample includes a mixture of powdered limestone (calcium carbonate), sugar and wax. What is the correct method for obtaining a pure sample of sugar?

  • ADissolve the mixture in dilute hydrochloric acid, filter and wash the residue.
  • BDissolve the mixture in hexane, filter and evaporate the filtrate.
  • CDissolve the mixture in water, filter and evaporate the filtrate.
  • DDissolve the mixture in water, filter and wash the residue.

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