Chemistry 5070 · O Level · Separation and purification
Separation and purification — practice question
Mixtures may be separated by different methods, chosen according to the physical properties of the components. A student is given two mixtures.
(a)[5]
Describe a method for obtaining a pure sample of solid sodium chloride and sand from their mixture, including the names of the techniques and apparatus used.
(b)[5]
Describe a method for obtaining pure samples of ethanol and butanol from their mixture, including the names of the techniques and apparatus used.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Add water so that sodium chloride dissolves” …