The box shows some methods that can be used in separating mixtures.
crystallisationdissolvingevaporationfiltrationpaper chromatographysimple distillationfractional distillation \begin{array}{|ccc|} \hline \text{crystallisation} & \text{dissolving} & \text{evaporation} \\ \text{filtration} & \text{paper chromatography} & \text{simple distillation} \\ \text{fractional distillation} & & \\ \hline \end{array} crystallisationfiltrationfractional distillationdissolvingpaper chromatographyevaporationsimple distillationFrom the box, select the best method for each of the separations.
You may use each method once, more than once, or not at all.
Separating insoluble sand particles from a mixture of sand and water.
Obtaining pure water from sea water.
Extracting the green pigments from a sample of crushed leaves.
Separating a mixture of different food colourings.
Separating a liquid mixture of methanol (boiling point 65∘C65^\circ\text{C}65∘C) and ethanol (boiling point 78∘C78^\circ\text{C}78∘C).
29 exam-style questions on Edexcel IGCSE Chemistry Elements, compounds and mixtures. Each one has a worked solution and a mark scheme showing where the marks go.