The box shows some methods that can be used to separate mixtures.
crystallisationdissolvingfiltrationfractional distillationpaper chromatographysimple distillation \begin{array}{|ccc|} \hline \text{crystallisation} & \text{dissolving} & \text{filtration} \\ \text{fractional distillation} & \text{paper chromatography} & \text{simple distillation} \\ \hline \end{array} crystallisationfractional distillationdissolvingpaper chromatographyfiltrationsimple distillationThe table lists some separations. Complete the table by giving the best method for each separation. You may use each method once, more than once, or not at all.
SeparationMethodto obtain solid sulfur from a mixture of sulfur and waterto separate a mixture of colored pigments in flower petalsto obtain pure water from a sample of pond water containing dissolved saltsto separate the different liquid fractions from crude oil \begin{array}{|l|l|} \hline \textbf{Separation} & \textbf{Method} \\ \hline \text{to obtain solid sulfur from a mixture of sulfur and water} & \\ \hline \text{to separate a mixture of colored pigments in flower petals} & \\ \hline \text{to obtain pure water from a sample of pond water containing dissolved salts} & \\ \hline \text{to separate the different liquid fractions from crude oil} & \\ \hline \end{array} Separationto obtain solid sulfur from a mixture of sulfur and waterto separate a mixture of colored pigments in flower petalsto obtain pure water from a sample of pond water containing dissolved saltsto separate the different liquid fractions from crude oilMethodA mixture of propanone and water is separated, and two colorless liquids, A and B, are obtained. Liquid A is propanone containing a small amount of water. Liquid B is pure water.
Describe a chemical test to show that liquid A contains water.
Describe a physical test to show that liquid B is pure water.
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.