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 copper(II) carbonate from a suspension of copper(II) carbonate in waterto separate the different coloured dyes in a sample of black inkto obtain pure water from a sample of seawater containing dissolved saltsto separate a mixture of liquid ethanol and water \begin{array}{|l|l|} \hline \textbf{Separation} & \textbf{Method} \\ \hline \text{to obtain solid copper(II) carbonate from a suspension of copper(II) carbonate in water} & \\ \hline \text{to separate the different coloured dyes in a sample of black ink} & \\ \hline \text{to obtain pure water from a sample of seawater containing dissolved salts} & \\ \hline \text{to separate a mixture of liquid ethanol and water} & \\ \hline \end{array} Separationto obtain solid copper(II) carbonate from a suspension of copper(II) carbonate in waterto separate the different coloured dyes in a sample of black inkto obtain pure water from a sample of seawater containing dissolved saltsto separate a mixture of liquid ethanol and waterMethodA mixture of ethanol and water is separated, and two colorless liquids, X and Y, are obtained. Liquid X is ethanol containing a small amount of water. Liquid Y is pure water.
Describe a chemical test to show that liquid X contains water.
Describe a physical test to show that liquid Y 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.