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Elements, compounds and mixtures

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Question 19

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 distillation​dissolvingpaper chromatography​evaporationsimple distillation​​

From the box, select the best method for each of the separations.

You may use each method once, more than once, or not at all.

a.

Separating insoluble barium sulfate precipitate from a mixture of barium sulfate and water.

[1]
b.

Obtaining pure liquid water from an aqueous solution of copper(II) sulfate.

[1]
c.

Extracting the soluble red pigments from a sample of crushed beetroot.

[1]
d.

Separating and identifying the individual amino acids present in a mixture.

[1]
e.

Separating a mixture of liquid hydrocarbons: pentane (boiling point 36∘C36^\circ\text{C}36∘C) and hexane (boiling point 69∘C69^\circ\text{C}69∘C).

[1]

Elements, compounds and mixtures Questions

  1. IGCSE
  2. /Chemistry
  3. /Elements, compounds and mixtures